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Ignored 08 Aug 2018, 12:57

Ignored!


.... 06 Jul 2018, 14:53

It's a shame.

I repeat ...

This website has always been a meeting point, where people asked questions and are nicely helped by experienced peers like Cactus Jack or Soundmanpt, and it should continue in this social function ...

WHY ...

... can people try to destroy this fine meeting point?


Soundmanpt 06 Jul 2018, 07:36

Sorry I posted the wrong time it should read "05 Jul 2018 17:18"


Soundmanpt 06 Jul 2018, 07:35

Once again the comment posted as me on "05 Jul 2018 14:18" isn't by me.


Weirdeyes 05 Jul 2018, 20:50

Dad

That is not Soundmanpt. This site isn’t too useful with all the impostors. Try reddit instead.


Dad 05 Jul 2018, 20:48

Thank you Soundmanpt for your honesty regarding your fetish.

I at this time will bow out from this fetish site.

I will disregard your advice to not allow my daughter to wear glasses, and will go with her eye doctors advice to get the stronger prescription.


Soundmanpt 05 Jul 2018, 17:18

To be honest, Glass Lenses does raise a small valid point which I should clarify. This website is for people with a strong sexual fetish for glasses wearers. I actually do find your stories quite arousing, Dad. I am especially interested in hearing more. Normally I would not say these things in public, but I am an honest man and believe you should know the truth. I don't think you should let your kids wear glasses. It is bad for their eyes at this age. They have no need for glasses right now because they have nothing important to see. Just forget about it because they will break them too often and it will be expensive. I am only being realistic with you. When your children truly need glasses, then you will know it is the right time to buy them.

This post is from me.


Soundmanpt 05 Jul 2018, 06:27

Once again the imposture is using my name and posting as me. I did not make that comment posted " "04 Jul 2018 00:42"


Carl 05 Jul 2018, 05:47

This website has really deteriorated. :(


.... 05 Jul 2018, 02:44

Soundmanpt 03 Jul 2018, 06:09

is the real Soundmanpt - this as a result of the language and error analysis I recently presented.

This website has always been a meeting point, where people asked questions and are nicely helped by experienced peers like Cactus Jack or Soundmanpt, and it should continue in this social function.


 04 Jul 2018, 01:36

Dad

Oh WOW, Soundmanpt is really telling you what he thinks you want to hear.

As he suggested, go back through his posts, especially the ones where he asks if the girls were aroused when their optician wisk back their hair to adjust the ear pieces of their glasses. One can only imagine his arousal doing this as an optician.

A lot of other creepy stuff there also.


Soundmanpt 04 Jul 2018, 00:42

Dad

Please disregard what was written by Glass Lenses.

As a retired optician, I can assure you that my posts have nothing to due with a glasses fetish.

If you read back through some of my prior posts, two many of the threads hear throughout the years, you will see that their is nothing related to what Glass Lenses is true, at least concerning my posts.


Antonio 03 Jul 2018, 22:17

Dad,

if your daughter reports to see fine in them and as she needs only -0.5 more you don.t have to buy necessarily new glasses to her.

But stay ready she will really need new stronger ones in 1 or 2 years as it is likely or possible her eyes proceed for a while in her youth this way and at -1 more she will be really on need of them to see the board.

From Dad to Dad, best regards, Antonio


Glass Lenses 03 Jul 2018, 21:22

Dad

You need to know that this is a glasses fetish web site.

People here get off sexually, talking and thinking about women, and young girls in glasses, especially for nearsightedness.

They love to talk about the progression of nearsightedness, and how prescriptions increase.

If I were you, I would ask your questions at Web MD, or some other site.

As a Dad, I think that you would be appalled at the thought of guys here masturbating, or getting aroused by information about your daughter.


Soundmanpt 03 Jul 2018, 06:09

Dad

When you daughter got her first pair of glasses 2 years ago when she was only 10 years you needed to expect then that her eyes were just starting to change and this wouldn't be a one time thing. She did good by making it 2 years without needing her glasses changed and she must still feel that her glasses are still working fine correcting her eyesight, but it isn't. The increase she needs isn't very much but enough that with the new prescription it will sharpen things up for her. Be prepared because she is almost certain to need her glasses changed all through her teen years and until sometime in her twenties when her eye will become stable and stop changing. If the cost of glasses is a problem you need to check out some on line sites. Their are a number of very good ones out their that won't cost you an arm and a leg. The one I always recommend is Zenni (zennioptical.com) They have a very nice selection of glasses starting as low as $6.95 for a complete pair in your daughter's prescription. And they have several hundred for under $13.00. Other sites that are good is Eye Buy Direct (eyebuydirect.com) and Frimoo (frimoo,com). But you do need to upgrade her prescription because her eyesight should be very important to you.


Dad 02 Jul 2018, 18:48

My 12yo daughter who has been wearing glasses for about 2 years recently had a checkup and her script changed. Her old prescription was OS -1.00 -0.50 OD -1.25 pl. Her latest script: OS -1.25 -0.75 OD -1.75 pl. Is it worth it for me to buy new glasses. Will it make a huge difference for her? She said she sees fine with her old script. Any guidance would be helpful. The doctor thought we should definitely get new glasses,but I wasnt sure if he was just trying to get us to spend more money at his store, thx.


Cactus Jack 19 Jun 2018, 09:43

Simon39,

It may be a little late for this, but you don't need to be too concerned about comments about your glasses. It only lasts a day or two. It is normal to be nervous about what others will say, but it really isn't much different than a new hair style or a new suit or in my case, seeing and old friend who remembers when I had hair and has not seen me since most of it fell out.

One thing you might experience if the pub is dimly lit, is that the menu is hard to read with your glasses. Don't be shy about lifting your glasses up to read the menu, unless it is posted on the wall. If it is on the wall, it will likely be easier to read with your glasses.

Don't be surprised if your friend needs glasses also.

C.


Simon39 19 Jun 2018, 08:46

Thanks CatusJack for your advice. Collected my glasses today. It is quite exciting wearing them. I can't believe how sharp everything is - bus numbers, text, bricks on buildings, eye colours, leaves on trees etc. I'm meeting a mate in the pub later will wear them then. Bit nervous...


Simon39 19 Jun 2018, 08:46

Thanks CatusJack for your advice. Collected my glasses today. It is quite exciting wearing them. I can't believe how sharp everything is - bus numbers, text, bricks on buildings, eye colours, leaves on trees etc. I'm meeting a mate in the pub later will wear them then. Bit nervous...


Cactus Jack 18 Jun 2018, 22:31

Simon39,

Whenever you want to, is my probably surprising answer. You glasses prescription which in the common format is:

OD (Right Eye) Sphere -1.00, Cylinder -0.25 x 88

OS (Left Eye) Sphere -1.00

are glasses for distance. Your vision is almost perfectly matched to your visual IT environment. You actually have built in "computer" glasses. A Sphere correction indicates that you have -1.00 diopter of Myopia in each ey and an almost inconsequential amount of Astigmatism in your Right Eye. With out correction your eyes have a built in +1.00. That means that when relaxed, your eyes focus at 100 cm (1 meter). With just a small amount of focusing effort you can focus closer if a display is less than 100 cm from your eyes or you want to read something at say a typical reading distance of 40 cm. The equation that relates lens power vs. focal distance is:

Lens Power = 100/ Focal Distance or Focal Distance = 100/Lens Power.

Because you don't drive, your glasses will be very helpful at the Cinema, Watching TV, Identifying friends at a reasonable distance, or simply enjoying having good vision beyond 1 meter. Depending on where you live, you may also enjoy seeing stars in the sky or individual leaves on trees.

Because of your age, it is likely that Presbyopia is creeping up on you, but because of your Myopia, you may not have noticed. You may notice that it take s some extra effort to see small text clearly, up close, with your glasses. Don't get excited, that is pretty much normal. If you experience that problem, just lift up your glasses or look over the top of them, whichever is more convenient. More about this if it becomes a problem.

Please let us know your experiences, what you decide to do, and If we can be of additional help.

C.


Simon39 17 Jun 2018, 17:34

Hi, I'm 39. I did not bother with glasses since my university days, I don't drive and I with in IT. I got an eyetest yesterday and I'm -1.00 -0.25 88, -1.00 - -. I was shown the difference and recommended to get glasses, which I'm collecting tomorrow. How often do you think someone with this prescription would wear glasses?


Lou 13 Jun 2018, 02:17

You are very welcome.


Likelenses 12 Jun 2018, 15:08

Ben

Eyes easily adapt to a minus prescription.

You may actually need a small minus in that right eye, along with the cylinder correction.


Ben 12 Jun 2018, 14:00

So I picked up my glasses and must admit they feel strange. The left eye seems perfect, the right feels a bit odd I think my vision might be worse with it. Been told it will take a while to get used to it


Lou 05 Jun 2018, 12:59

You are very welcome.


Ben 05 Jun 2018, 12:53

Thanks for your replies. I am 29 and live in the UK


Lou 05 Jun 2018, 12:50

Hi again Ben

I meant to add that astigmatism is common, especially a small amount like you have, and that it effects vision at all distances.


Lou 05 Jun 2018, 12:47

Hi Ben

Yes, I can help with this:

R +0.25 Sph -0.50 Cyl Axis 74

L -0.75 Sph

You have astigmatism in your right eye, as shown by there being a cylinder (cyl) value on your prescription. Astigmatism simply means that your eye has two points of focus, at axes 90 degrees from each other.

Your right eye has a prescription of +0.25 at the 74 degrees axis. At the opposite axis to 74 (i.e. 164), your prescription is the Sph (sphere) value - the cyl (cylinder) value, which is +0.25 -0.50 = -0.25.

You therefore have a prescription of +0.25 at the 74 degrees axis, and -0.25 at the opposite (164) degrees axis. This is called mixed astigmatim, as you are far-sighted on one axis, and near-sighted on the other. A plus sphere denotes far-sightedness whereas a minus sphere denotes near-sightedness.

Your left eye is simply near-sighted, owing to the minus sphere. You have no astigmatism correction in your prescription for your left eye.

Overall you have a small prescription, as denoted by the low values.

I hope that this will help


Cactus Jack 05 Jun 2018, 12:43

Ben,

Actually, you are very slightly farsighted with some Astigmatism in your Right Eye and mildly nearsighted in your Left Eye. It is not unusual for there to be a difference in the correction required for each eye. Yours just happen to be on each side of 0.00.

While the difference is not very large, it does make it hard for your eyes to work together, as a team, to provide good depth perception.

I will be happy to give you a more detailed explanation, but I would like to ask a few questions.

1. What is your age?

2. Where do you live? (country)

I may have some more questions after you answer those.

C.


Ben 05 Jun 2018, 12:13

I was recently prescribed my first pair of glasses but am not sure if I am nearsighted or farsighted. My prescription is:

R +0.25, -0.50, 74

L -0.75

The eye doctor said there is quite a difference between my 2 eyes and they don't work together that well. I already knew my left eye was worse than my right.

I was told the glasses would help with distance vision and also when using a computer. But seen as I have a +0.25 in my right eye, isn't that what people use for reading. But, the cylinder is for distance. I'm a bit confused. Can anyone clear this up?


Soundmanpt 11 Apr 2018, 07:01

Curious Fiance

Reading between the lines I would bet that your nearsighted and mostly wear contacts which is probably why you were ordering your fiance's contacts for him. So i'm sure that you're comparing how your own eyes work with contacts or glasses to his eyes. You're probably able to read pretty well without the need for contacts or glasses. But your distance vision is probably pretty blurry without contacts or glasses. So you're wondering why he needs his contacts or glasses in order to see both closeup as well as distance? Just because his prescription is a plus prescription meaning he is farsighted he needs contacts for close and distance. Also he has rather strong astigmatism correction and astigmatisms effects vision at all distances.


CuriousFiance 11 Apr 2018, 02:04

Can someone explain to me my fiance's prescription, he wears contacts and glasses sometimes. He recently had me order him contacts and it was really hard understanding.

OD Sphere +2.50 Cylinder +3.50 Axis 100

OS Sphere +2.50 Cylinder +3.00 Axis 85

His glasses magnify his eyes a lot and he has trouble seeing close and far, never seen that before.


Neville 24 Mar 2018, 14:07

Lara I hope I can answer your question.

Until I had cataract surgery I was hyperopic +9. Without glasses all was a blur but I could make out vague shapes and colour especially in good light.

The cataract surgery wasn't straightforward and implants were not fitted. Now I have extremely strong lenses and my vision without glasses is so blurred I cannot function at all.


Jamie37 24 Mar 2018, 07:07

So the glasses I ordered from Zenni arrived and actually took the bifocals for a public outing today. I can see what doc said about not being necessary for full time, but Def can tell there will be occasions when I will want to be wearing the add for comfort. So basically depending on what I will be doing will determine what I wear.

The bis I ordered are lined which I understand is not the most cosmetically amazing but like how much I can see through them which I know can be issue in progressives.


Weirdeyes 20 Mar 2018, 09:10

I have 1.00 base in prism for each eye. I sometimes notice pretty bad double vision and I sometimes don’t. I remember when I got tested once they said I needed 8 diopters of prism. I assume they meant 4.00 for each eye. Cactus Jack, you mentioned that doing close up work as a myope can sometimes make you cross eyed. Could doing the same thing as a hyperope do the opposite? I do A LOT of close up work and always have. No one knew I was farsighted until I was eleven years old. Even then they only noticed it in my left eye, but I know both eyes are farsighted because I can’t really see details up close.


Cactus Jack 19 Mar 2018, 23:01

Spartoo,

Oops, the post below was from me.

C.


 19 Mar 2018, 23:00

Spartoo,

Yes, it is normal for a person with only a tiny bit of measured strabismus (eye misalignment). A total of 3 prism diopters Base Out is not very much prism. Each eye is turned inward less than 1 angular degree. Unless there are other problems, that should be well within the capture and fusion range of your Eye Position Control System (my name). If you don't notice any double vision without prism correction in your glasses, I would not bother.

If you notice difficulty keeping the two images from your eyes fused into a 3-D image hen that is another story.

C.


spartoo 19 Mar 2018, 22:27

Hello, I had glasses with prism of 1.50 right and left eye, horizontal base outside.

I do not need it and I never wear it.

But I would like to know if this is normal that I see as if there was no prism?


Cactus Jack 18 Mar 2018, 11:30

Kevin,

As Jared said, it is up to you.

R: -0.25 -0.50 101

L: -0.50 -0.50 107

Is not a very strong prescription, but optically a little bit of Myopia goes a short distance, visually.

Your Astigmatism correction is likely the major factor in your visual comfort, but lets look at the first number, which is the Sphere correction.

-0.25 means that everything beyond 4 meters or about 13 feet is increasingly blurry.

-0.50 means that the blurry distance is more than 2 meters or 6.5 feet.

There are lots of things that you are missing without correction.

Astigmatism as indicated by the 2nd and 3rd numbers, which are Cylinder and Axis. Cylinder and Axis ALWAYS go together. Astigmatism is typically caused by uneven curvature of the front surface of your Cornea. It is steeper in one direction than it is in another like a slice from the side of an american football. The difference in curvature causes images to have two different focus distances. It is most noticeable on small print where the lines that make up the letters will focus at one distance and other lines will focus at a different distance, depending on which direction they run. This confuses your Focus Control System (auto-focus system), but there no way your eye can focus at two different distances at the same time, but it tries.

You may think that you have pretty good vision, but you actually don't. Vision actually occurs in the brain, your eyes are merely biological cameras. Your brain has the amazing ability to correct slightly blurry images, IF it know what something is supposed to look like. The problem with that is that it takes a significant amount of effort and energy.

If you correct the images optically with glasses or contacts, your brain can devote its efforts to other tasks. However, it takes a while for your brain to realize that when you wear your glasses, it has less work to do. Think of glasses as labor saving tools. That is why we typically suggest wearing your glasses full time for about two weeks before making a decision about when to wear them.

With one exception. That exception is that you should wear your glasses when driving.

If you are apprehensive about what your friends and relatives will say about your wearing glasses, remember that you don't wear vision correction for THEIR benefit. Wearing glasses is no different than a new hair style or some new clothes. The comments or questions only last a day or two and then it is old news. The only time after that that your glasses will get a comment is if you change frame styles. Few people notice prescription changes.

Hope this helps.

C.


Jared 18 Mar 2018, 09:04

Kevin

Only if you want.


Kevin 18 Mar 2018, 08:45

First time poster here; is a prescription of R: -0.25 -0.50 101 L: -0.50 -0.50 107 warrant full-time wear?


Cactus Jack 17 Mar 2018, 04:37

Lara,

You can get a pretty good idea of what a very farsighted people see without their glasses by wearing an older pair of your glasses over your current glasses. It won't be exact, but as they say, a picture is worth a thousand words.

C.


Galileo 16 Mar 2018, 21:41

@Lara - I think it is worse for very longsighted people. I have known two cases personally; a woman who was early 60s and Rx of +6. She could not see near or far without her glasses. Could not read a school size clock across a room and could not find her glasses if she had not put them down herself. She could not read a book at any distance.

The other was a woman in her early 20s with a Rx of around +10. She said all she could see without glasses was patches of colour, no detail at all near or far.


Lara 16 Mar 2018, 20:21

What is it like for farsighted people with very high prescriptions, even lenticulars? Is their vision usually blurry both near and far without glasses? I’m nearsighted, around -6.50 left and -8.75 right. I can’t see crap far away without my glasses but I can read without them.


Jamie37 10 Mar 2018, 07:16

During the exam, the eye doctor and I discussed the add and bifocals. He recommended with me being in retail and what i do on a daily basis, to not do full time use yet in bifocals.

Which is why he did the rx the way he did. I am getting my main pair in single visions.

However, I will also be going online and getting a pair of bifocals to experiment with.


Curt 09 Mar 2018, 08:28

So, are you going to get the bifocals or not???


Jamie37 08 Mar 2018, 17:57

So the verdict is in after my exam.

My new rx is

OD -6.25 -3.25

OS -6.75 -4.50

and also given optional add of 1.00


Likelenses 06 Mar 2018, 19:26

Jamie3

Considering your current prescription, those symptoms will certainly result in a bifocal prescription.


Jamie37 06 Mar 2018, 18:29

Just did paperwork for upcoming test.

Admitted that been experience eye strain, occasional burning and redness after prolonged close work/use of phone


Lou 06 Mar 2018, 11:24

Hi Jamie37

Thanks very much for the clarification. I'm very sorry, but although I now understand what you are experiencing, I can't offer a reasonable explanation. Hopefully somebody else will be able to.

Best wishes

Lou


Jamie37 05 Mar 2018, 15:06

Hey gang,

Thanks for the posts. I will do a quick synopsis of moi

Jamie, 41, male USA

wear -5.75 and -6.50 with roughly -3.5 astig both eyes. Yep highly astigmatic.

I probably hold my reading a bit closer than normal for most people. And, so not the typical arms longer bit.

However, when something is farther out I do notice it has gotten a bit harder to read, probably also in part to my decent rx.

Notice that when do put some 1.25 cheaters in front, that the smaller print on bottles and cans is easier to read at more of arms length distance with the extra help.

Hope this helps!

Thanks for all the great advice so far!


Lou 05 Mar 2018, 06:42

Hi Jamie37

When you say, "Biggest difference is if i have a bottle at arms length in that case the extra help does seem to make a difference.", if you don't mind me asking, are you saying that you need to hold a bottle at arms length to see the small print clearly, or that the extra help makes a difference, if you choose to hold a bottle at arms length?

I ask because I have a small distance prescription for simple hyperopic astigmatism, and I find that my glasses make a greater difference at intermediate and distance than at near.

I'm not sure whether this is because at 44, my glasses are not strong enough for near, therefore I don't really notice the difference they do make, or probably more likely, my astigmatism affects me personally more at intermediate and far distances.

However since you are talking about a reading add rather than a plus prescription for astigmatism, I can't see any reason for reading glasses making a greater difference at intermediate than at near. I therefore presume you are saying that you find reading glasses helpful when you are having to hold bottles with small print at arms length, to see them clearly. If this is the case, then I think that you are quite likely to be prescribed bifocals or progressives.

All the best

Lou


Likelenses 05 Mar 2018, 00:11

Jamie37

At 41 it is highly likely that you will wind up in bifocals.

You did not say what your present prescription is, and if you are male, or female.


Jamie37 02 Mar 2018, 13:26

Hi Soundman,

Thanks for responding. I guess I am more curious as to how is it decided it's time for bifocals. As said, i can still read okay through my single visions although did notice a little difference when i put a 1.00 reader in front in terms of comfort and ease of reading although can still read the computer screen comfortably either way.

Biggest difference is if i have a bottle at arms length in that case the extra help does seem to make a difference

Thanks!


Soundmanpt 02 Mar 2018, 08:50

Jamie37

Since you seem concerned about being prescribed with your first bifocals does that you meant that you currently already wear glasses for distance? If so do you wear them full time or just as needed? I ask that because really if you already wear glasses for distance the change to bifocals shouldn't be too bad for you. Instead of getting bifocals with the line you should go with progressives because their isn't a noticeable line across your lenses. So your glasses will only look like single vision glasses. Of course your eyes will notice the difference if you in fact are prescribed with bifocals. It does take a bit of adjusting to at first. Mostly you will need to be extremely careful going up and down steps. If you're a woman and wear heels even more so because the steps are going to appear to be at a much closer distance than they really are. At 41 and since you sometimes use "cheaters" I think there is a pretty good chance that you're going to be prescribed bifocals. you know their coming at some point anyway.


Jamie37 01 Mar 2018, 11:37

For those of you who have been around this site for a while, you know that I am eyescene's best at liking bifocals on others but never wearing them myself.

Well, just turned 41 and booked an appointment for next Thursday at 4PM. Honestly, not sure what the outcome will be this time. As, I can read okay although not sure if that's me being in denial. Do have some cheaters after last exam, but rarely ever use them


ric 20 Feb 2018, 10:01

To Meredith: i wear scleral contacts, but i have soft contacts for spare or summer. As the Biofinity toric XR, just go here up to -10, got the Byofinity multifocal toric, that are avaiable up to -20 in myopia and up to -5.75 in astigmatism.


ric 20 Feb 2018, 09:34

Meredith: then you can go for toric disposables with your correct prescription for myopia and astigmatism. Nowadays can choose some brands.


ric 20 Feb 2018, 09:34

Meredith: then you can go for toric disposables with your correct prescription for myopia and astigmatism. Nowadays can choose some brands.


ric 20 Feb 2018, 09:08

When first started wearing contact lenses, i did not wear astigmatic prescription. Years before, i tried soft toric lenses that were the early version of Bauch & Lomb toric. They never feel comfortable and ended wearing soft lenses without astigmatism correction for years. When astigmatism was sightly high and compensating it with more myopia correction was not enough, turned back to toric lenses in disposable kind.


NNVisitor 19 Feb 2018, 22:21

Meredith

I've never worn soft contact lenses. With gas permeable lenses at first one would feel them on their eyes. As wearing time gets built up day by day after wearing them at least 9.5 hours a day I feel them when I put them in. Then after a little while I barely notice them except for the vision I get with them. If dust or an eyelash gets under the lens then they can be painful and will have to be removed. That does not happen often but if you live in a dusty climate it may be different for you.

My prescription was -10 both eyes with astigmatism R -1.75 L-2.50 for glasses. The contact lens fitter would do the CL conversion. After many years my glasses prescription went down to -9.50 for both eyes and the astigmatism was about the same. Over the years I built up wearing time so sometimes I wore the lenses as much as 16 hours a day only wearing my glasses early morning and late evening. Gas permeable lenses such as the Boston Lens do correct sphere and astigmatism.


 19 Feb 2018, 16:54

Meredith, that's perfectly possible. You can wear glasses with only astigmatism correction over your contacts so you're fully corrected.


Meredith 19 Feb 2018, 16:05

Another question I'm hoping to get advice on:

I'm currently wearing -13.50 contacts, sphere only. My glasses prescription is -16 with some astigmatism in each eye. Would it be possible to get glasses to wear over my sphere only contacts to correct the astigmatism part of my prescription? I understand that -13.50 rx in contacts is pretty close to the -16 rx for glasses, but I'm experiencing blur since my astigmatism isn't corrected in my contacts.

Just exploring my options between glasses over contacts and contacts with the full rx.

Thank you!


Meredith 19 Feb 2018, 16:02

NNVisitor,

I looked up the Boston brand you mentioned and they seem more affordable than the Hydrasoft ones I had found. Is your prescription like mine? Also, have you worn soft lenses in the past, and if so, what motivated you to switch to RGPs? How do you find the comfort and optics between soft lenses and RGPs?

Thank you so much for your time!


 18 Feb 2018, 15:06

@ 18 Feb 2018, 02:38

True, but LikeHitler should be a goner too.


 18 Feb 2018, 06:31

It's probably you.


 18 Feb 2018, 02:38

We need to get this anonymous vulgar troll banned from eyescene.


 17 Feb 2018, 17:42

LL is far too much of a chickenshit to ever answer questions about his fake fantasy women. LL reminds me of one of those fatass basement bullies you find on Facebook who wank off all day long about pissing people off and dream up stalky fantasies about women who supposedly love them, bullshit stories about Iran and myopic bulge, racist comments about people, buying glasses for people, and making up fake fantasy characters on eyescene. And when he gets busted, he doesn't even have the balls to admit it! He just spits out more anger and hatred.

LL is a joke. No one wants him here.

Move on, troll.


 17 Feb 2018, 17:41

Actually, you're right. We can only dream, as she doesn't exist.


Likelenses 17 Feb 2018, 17:37

17 Feb 2018, 17:24 poster

You have verified my prior post.

Also you can only dream of having a beautiful, charming, talented, and myopic girl like my Cheryl.


 17 Feb 2018, 17:24

Dear Likelenses, you are obsessed with everyone's mental health and sexuality. Maybe you have a problem with your own? In all seriousness, you are the most disgusting rotten apple in this forum (and there are a few). You are a racist, mysoginistic prick that constantly insults and attacks people. You cause people to leave the community with your stupid behaviour. And we don't buy your wanker fantasies about that "Cheryl", unless that's how you call your right hand.

BTW, you haven't talked about her for months. Why is that?

Oh, right, because she doesn't exist.


Likelenses 16 Feb 2018, 19:19

16 Feb 2018, 18:45 poster

It sounds as though you are a very bitter person, that can not find a member of the opposite sex that finds you interesting, or attractive.

Perhaps it is due to a mental condition, or perhaps your sexuality

You are to be pitied.


 16 Feb 2018, 18:45

don't you have enough girlfriends already, Likelensyes? how many women have you claimed love you to death so far? June. Cheryl. LauraC. you are the eternal romeo flunkie of eyescene. hahaha


Likelenses 16 Feb 2018, 16:56

Meredith

Many guys here find women with high myopic prescription glasses to be extremely attractive.Your prescription certainly puts you in that category.

If you were my wife, or girlfriend, I would love for you to wear glasses only, and it would really be better healthwise for your eyes.


NNVisitor 15 Feb 2018, 22:57

Meredith

I've worn the Boston Lens gas permeable contact lenses for many years. My vision has been really great with them. My suggestion is to discuss your needs with a contact lens fitter that you have confidence in to find out the best option for you.


Meredith 15 Feb 2018, 17:33

Hi, I have a glasses prescription of

Right: sphere -16, cylinder +0.75, axis 135

Left: sphere -16, cylinder +1, axis 90

I currently wear -13.50 soft contacts that only correct my sphere and I'm having a really hard time seeing well, especially when my eyes are dry or tired. The brand is Biofinity XR and this particular brand does not have astigmatism correction in high sphere powers.

I'd like to do some research to see what other options I have for contacts. I came across the CooperVision hydrasoft lenses, which can be customized to almost any sphere and cylinder correction needed. I also came across the SynergEyes Duette lenses which are a hybrid lens with RGP in the center with soft lens on the outer part.

Two questions:

1) Do you know of any other contacts brands that would come in my rx?

2) Are optics better with RGP lenses compared to soft lenses in high prescriptions like mine?

Thank you!


Jhon 27 Jan 2018, 04:31

My girlfriend is very long sighted and wear plus 7 in right eye and plus 8 in left eye full time,she had just been for a eye test and has been told she needs 6 out prisms in both eyes, Will this make her lens much thicker.He also suggested she had a separate pair of reading glasses,would these be stronger or weaker prescription he did not say.she is only 26

Thanks

We can only afford the cheapest lens


Jhon 27 Jan 2018, 04:31

My girlfriend is very long sighted and wear plus 7 in right eye and plus 8 in left eye full time,she had just been for a eye test and has been told she needs 6 out prisms in both eyes, Will this make her lens much thicker.He also suggested she had a separate pair of reading glasses,would these be stronger or weaker prescription he did not say.she is only 26

Thanks

We can only afford the cheapest lens


Weirdeyes 26 Jan 2018, 23:01

Likelenses

Why are you so concerned about my mental health, anyways? This site is EYEscene, not MENTALHEALTHscene. My vision issues are making my mental health worse, but my mental health has minimal effects on my vision.


Likelenses 26 Jan 2018, 22:53

Weirdeyes

No need to do that Miss potty mouth, as I have my own beautiful, high myopic GWG.


Weirdeyes 25 Jan 2018, 23:06

Likelenses

Why don’t you mind your own business and go back to jerking off to girls with thick glasses?


Likelenses 25 Jan 2018, 22:04

Weirdeyes

Since you seem to bounce around from about every eyesight symptom that exists, I would suggest that you see your mental health professional, rather than seeking a lasik doctor.


Lou 25 Jan 2018, 07:45

Hi Weirdeyes

I completely agree with Billy A, abd would proceed with caution.

Best wishes

Lou


Billy A. 25 Jan 2018, 03:31

Weirdeyes

Be carefull and dont trust to surgeon too much. Remember, this is hard business. It could be the worst decision in your life and there's no way back. You have cyls and your prescription is problematic..

Please let us know about the results


Weirdeyes 24 Jan 2018, 16:45

I’m getting a lasik consultation next week.


Billy A. 24 Jan 2018, 14:40

Weirdeyes

It's very interesting how many facts gives to the lenses their final look (and look of the eyes behind the lenses)

Not just PD and frame size, there's more facts, which is very amazing. As you mentioned, combination with prisms makes some difference too.


Weirdeyes 24 Jan 2018, 14:06

I once knew these twins who wore plus glasses. One wore wire rimmed glasses and one wore a plastic frame. I thought they were +6.00 or something. I eventually overheard the one in wire rim glasses say they are +5.00. I thought they looked thick and strong, but that could be because she was wearing wire rimmed glasses with what I assume were low index lenses. If my prescription does get to +5.00, it won’t be +5.00 proper because of the cyl. It will be +3.50 which some people still consider strong. I wonder if my glasses look stronger than +2.75. I know I get more facial distortion. One thing that’s interesting is that since I have 1D of base in prism my glasses don’t distort my face as much. So they look weaker.


Billy A. 24 Jan 2018, 13:47

Weirdeyes

For someone is very strong +5, for someone else is very strong +20..

Today i got new glasses - Ray Bans with CR extra lenti 1.5 index, -12 both eyes. For my co-worker they're incredibly strong, but for me they're just normal glasses. I'm wondering about reactions from my closest friends and family :)


Weirdeyes 24 Jan 2018, 13:42

Lou

When I wear plus glasses over my rx the blur through my right eye looks like horizontal focus. https://upload.wikimedia.org/wikipedia/commons/4/42/Astigmatism_text_blur.png


Weirdeyes 24 Jan 2018, 13:35

Billy A

I guess +7.5 looks strong to everyone. I wonder at what point glasses look undeniably strong regardless of lens material or frame choice. I know my +4.25 glasses still look normal. One person said +5.00, but I don’t think that’s much stronger.


Joey 24 Jan 2018, 05:50

Well, I just got my new glasses and things are really clear with them! My eyes changed more than i had realized i guess! I am now needing a -2.00 -0.50 x 160 and a -1.75 -0.75 x20. They told me to come back in 6 months since it changed so much. I hope i dont need a big change then too!


Lou 24 Jan 2018, 02:06

Hi Weirdeyes

Re.:Lou

I did think about having too much cyl. I just remember -0.50 barely making a difference. I just got a record of my old prescriptions and my right eye axis has always been around 170.

Thanks very much for the clarification. I just thought that it would make sense to cover all bases.

Best wishes

Lou


Billy A. 24 Jan 2018, 00:48

Weirdeyes

Yes, her difference is really noticeable. +7.5 is really magnificating. But with two different indexes she feels very comfortable and she has her confidence back. I'm so happy because of this :) The difference of indexes is compensated by premium coatings and it works very well for her! She asked me if I can help her because she saw me wearing superlenti glasses. I think I made good job and made one person happy. Such a great feeling!


NNVisitor 23 Jan 2018, 21:54

Why is the 20 year old woman being quized about something personal? She's being harrassed. It's really no one elses business.


Weirdeyes 23 Jan 2018, 18:10

I just wrote some handwritten notes on my prescriptions like what I liked and what I didn’t like. Hopefully it can help clear things up without making me look crazy/malingering. Like I mentioned that with my current rx I feel like my eyes have to work harder to focus, but it’s easier to move them around(better binocular vision). I also mentioned that things looked very vivid when I wore a +3.50 contact lens by accident.


Weirdeyes 23 Jan 2018, 17:16

Billy A

I’d be disgusted as well! Apparently the difference between my eyes isn’t noticeable. I’ve asked my family members many times. Don’t know if they’re being polite or not. No one has mentioned it, but this one observant man told me he noticed after I mentioned it. I guess the difference between my eyes is lower than her’s.


Billy A. 23 Jan 2018, 16:29

Weirdeyes

All questions are the same - about difference in magnification. She told me that se's disgusted by all these questions. Thousands of questions type "Why you have one eye smaller and one bigger?" could be really annoying.

A lot of opticians here doesn't want to make one glasses with two different indexes too, but as I said - I'll pay, you'll make!

Make one glasses with two different indexes was my idea and she liked it. Both lenses looks the same, just one is "catching more light".


Weirdeyes 23 Jan 2018, 16:01

Billy A

I guess that makes sense. What type of questions do they ask her about the magnification? How do the lenses having different indexes look? A lot of opticians in North America don’t do that. I have high index in both lenses even though my good eye is close to plano at the moment. I wonder if she’d be interested in talking to me? I kind of am, but I’m guessing she finds it too traumatic or boring.


Billy A. 23 Jan 2018, 15:22

Weirdeyes

To be honest, our working team is 90% young guys and 10% young ladies. I think they asking her a lot not because of her glasses, but just because she's very attractive. They just don't know how to start the conversation and her glasses are great starting point :) Just my opinion, but I think I'm right. There's another girl with -11 glasses and nobody asks her, why? The answer is - she's absolutely unattractive. Sad, but true..


Weirdeyes 23 Jan 2018, 14:35

Lou

I did think about having too much cyl. I just remember -0.50 barely making a difference. I just got a record of my old prescriptions and my right eye axis has always been around 170.


Lou 23 Jan 2018, 14:15

Sorry when I said:

Anyway, I found from experience that a cylinder of -0.50 rather than -0.25 blurs my vision in my RIGHT eye. Funnily enough although +0.50 Sph -0.50 Cyl is better in my right eye, I don't have the same difficulties with +0.75 Sph -0.75 Cyl in my right eye. Eyes are funny things.

Where I have altered the word right to be in capitals, I meant to say left.

Best wishes

Lou


Lou 23 Jan 2018, 14:12

Hi Weirdeyes

I've thought about something which may be of some use to you. After being unhappy with the vision of my left eye since a prescription change in March 2014, I had an eye test with a very good optician who finally sorted it in Feb 2017, with a return to the prescription I had prior to March 2014.

The reason I am mentioning it, is that I had eye strain in the distance at near, felt that it was harder to see the edge of the road/beginning of the bank (as you no doubt no, we drive on the left in the UK) on country roads with no outside kerb or white line, just a transition from the road to a grass bank, and found close reading difficult.

My prescription was changed in my left eye from:

+0.50 Sph -0.50 Cyl to +0.25 Sph -0.25 Cyl with no change in axis (or basically none. A previous option had tried changing my axis from 83 to 88 to solve my left eye problems, and it made no difference, and since I could tell the difference with -0.25 cyl in Feb 2017, she said that she would split the difference and go with 85).

To avoid confusion, I'll use an axis of 85 for both prescriptions.

My understanding that my old prescription had a sphere value of +0.50 at 85 degrees and plano at 2 degrees, whereas my new prescription has a sphere value of +0.25 at 85 degrees and plano at 2 degrees.

I wouldn't have thought that having a sphere value of +0.25 too high at 85 degrees would blur my near vision in that eye, but I can assure you that it did.

Anyway, I found from experience that a cylinder of -0.50 rather than -0.25 blurs my vision in my right eye. Funnily enough although +0.50 Sph -0.50 Cyl is better in my right eye, I don't have the same difficulties with +0.75 Sph -0.75 Cyl in my right eye. Eyes are funny things.

I fully appreciate that you've found that you can see better with -1.50 Cyl than no cylinder, suggesting that your right eye Cyl of -0.75 is not too high, but you never know, and I wouldn't completely rule out the idea of too much cylinder, as well as considering too little sphere, too little cylinder and an incorrect axis.

I hope that this will help.

Best wishes

Lou


Billy A. 23 Jan 2018, 10:51

Weirdeyes

They ask mostly about magnification, yes, the difference between left and right eye is very noticeable. Her glasses are interesting for a lot of our co-workers (I'm sure they aren't OOs) But most of people just staring, they have no presumption to ask. But from her looks I can see what they're thinking about.. Now We're at work now, she's 20 meters from me :)


Weirdeyes 23 Jan 2018, 10:17

Billy A

What kind of questions did they ask? In my case my glasses look pretty normal. The spherical equivalent for my bad eye is +3.50, so it still looks pretty normal. The good eye is close to plano. I know this isn’t the best prescription because I struggle to read fine print and keep close up things in focus. I wonder if my good eye will ever get to +3.00.


Billy A. 23 Jan 2018, 09:54

Weirdeyes

The difference must be obvious. A lot of people asking her about her glasses, because one eye is noticeably much bigger than second. When she wore glasses with 1.5index lenses, the difference was very, very big. The lens with +7.5 was very thick and heavy. Lens with +3.5 was "normal", nothing unusual. Everyone noticed the difference. Now, with combination of the lenses nobody noticed! Now is the difference just in magnification, who's not interested about glasses, cannot see there's any difference.


Weirdeyes 23 Jan 2018, 09:26

Billy A

Is the difference obvious to non optical obsessives or just you? I’ve never noticed my glasses being heavier on one side. Maybe this is because I mainly get high index lenses. I still notice my left eye is magnified more which I imagine is obvious in your co-worker as well.

The only time my glasses looked visibly thicker on the left eye was when when my prescription was R +0.25 -0.50 L +3.50 -0.50. I never really wore glasses then. I only wore a +3.25 contact lens in my left eye. I also obviously didn’t get high index when I first got glasses, but the left eye was still under +2.00.

I’m not even sure optical obsessives would notice the difference back then. I never worried about my left eye looking more magnified to other people. I just worried about looking geeky because I was wearing glasses like a lot of young people did. Interestingly when I was first told I need glasses I was concerned the image size would be different for me. I also never saw glasses that had one lens with a prescription and one lens plano before. I just couldn’t imagine it for whatever reason.


Billy A. 23 Jan 2018, 00:46

Weirdeyes

Yes, the difference is very obvious. The big difference make one lens heavier, so her glasses were askew, which is not so good because of astigmatism. Now she has one lens (+3) 1.5index and second (+7.5) high indes. It works and looks very interesting. With this combination the glasses are sitting on the nose perfectly horizontally, both lenses have the same thickness, more less.


Weirdeyes 22 Jan 2018, 20:16

Billy A

Is the difference between her lenses obvious? That’s something I’m self conscious about.


Billy A. 22 Jan 2018, 05:18

Weirdeyes

People love to cut corners everywhere.. Its very sad, a lot of opticians realy dont care about patients eyes, but they really care about patients money..

If you have bad sleep, your eyes are tired next day so I guess too that your father was right.

Just dont give up, I believe you will find your ideal prescription :)


Weirdeyes 22 Jan 2018, 04:43

Billy A

I’m Canadian. People love to cut corners here. I did go to an old school optometrist when I was nine years old. He used no autorefractor. He said I don’t need glasses and won’t need to get them tested for another five years. I did end up getting my eyes tested again at eleven and ended up with R 0.00 L+1.25. He said I needed glasses because of poor vision in my left eye.

I did remember things being small and hard to read, but I just thought it was because the letters were small or I was mildly nearsighted.

I was confused because the prescription was pretty low. I assumed that was typical +1.25 vision. I now know it’s not. I think that type of vision is more typical of severe farsightedness. Now I know what he’s talking about.

I remember my mom being upset that my prescription increased to R +0.25 L +1.75. I was scared of saying anything when I enjoyed the vision I got out of wearing my glasses on top of each other. I conveniently got the math wrong and told myself my left eye needs +2.00 something. I considered +3.00 a “thick lens” and I could never picture myself wearing one.

I was shocked when my next prescription was R +0.25 -0.50 L +3.50 -0.50. I considered that a thick prescription and couldn’t believe I had a thick prescription. I guess I was in denial because I did notice things were pretty blurry through my left eye and not just minified like they used to be. I should have been more shocked at the difference between my eyes. I was just so focused on needing a thick prescription. My dad always said that if I got bad sleep before an eye exam I would get thick glasses. I guess he was right.


Billy A. 22 Jan 2018, 03:49

About "modern" opticians - if I want to buy new glasses for goc, i go just to modern ones! There's incredibly easy to cheat and get my dream glasses! Tat says it all..


Billy A. 22 Jan 2018, 03:27

She is working with us for two years, for this time she wore more than 10 glasses with different prescriptions. I have no idea about her old prescriptions, I just now she always had problem to find an ideal one. I hope you'll find your ideal lenses too! Just find good, interested optician. I don't know how about your location, I'm living in the Eastern Europe we have modern opticians and oldschool ones too :) Little bit of yesterdayness could be sometimes good!


Lou 22 Jan 2018, 03:25

Hi Weirdeyes

I believe that Billy A has suggested a very good solution for you, finding an optician that relies on old school techniques rather than autorefractors.

I imagine that you can always request for the autorefractor not to be used, but really you want an optician who generally doesn't use an autorefractor as part of their normal way of testing patients.

Maybe it is because I am in the UK, but the last time I looked into an autorefractor, was the first time I visited my particular opticians (the branch overall rather than when I started seeing the particular optician which I now always request). They seem to however use it on my children.

My optician used retinoscopy during my last two eye exams. Personally I feel that a retinoscope is more accurate than an autorefractor.

You may find the following interesting, especially since the average age of the subjects was 21.

https://www.ncbi.nlm.nih.gov/pubmed/15630406

All the best

Lou


Weirdeyes 22 Jan 2018, 03:03

Billy A

Do you know what her old prescriptions were like? I’m happy for her and hope I can find a prescription I’m comfortable with. Everyone around me just seems to cut corners. I don’t mind long exams. I’m just so frustrated.


Billy A. 22 Jan 2018, 02:57

Weirdeyes

Interesting. I want to know more about her eyesight, but I dont wanna talk about, 'cause she's very sensitive person and this is very painfull topic for her. We were never talking about her eyesight in the past. I just know, she had big trouble to find ideal prescription powers. So i advised her to find optometrist to make "old school eye test" without autorefractor and other machines (I know really nothing about the methods of optetry) but when one is not working well, the other can! Now shes very comfortable with her new prescription, after years of suffering and I'm so happy because of this :)


Weirdeyes 22 Jan 2018, 02:44

Billy A

Without correction at the moment I see nearly perfectly, but with the occasional blurry image from my left eye. Things also look lower contrast and I don’t have the greatest depth perception. My left eye sees things pretty blurry, but it’s still able to accommodate. When it does accommodate everything looks minified and hard to see. I’m not “blind” without glasses, but my eyes definitely go crazy. A lot of people with a similar prescription to me just say they’re blind without glasses to justify wearing glasses. A lot of the time I feel like my glasses prescription is too weak to wear full time, but I’m self conscious about my glasses being thick at the same time. One ophthalmologist basically said I don’t really have sight issues since my right eye is 20/20. It’s actually closer to 20/30, but that’s not the point.


Billy A. 22 Jan 2018, 02:27

Weirdeyes

I don' know exactly, but she said if she cover left eye, everythings blurry. If she cover right eye, everythings more blurry and if shes looking both eyes, everything is "chaotic blob of nothing and my eyes are going crazy". I cannot imagine how she can see without any correction..


Weirdeyes 22 Jan 2018, 02:07

Billy A

Did she ever suffer from latent hyperopia or appear to have near perfect vision in one eye? One OD estimated my prescription is around +3.00 and +6.00, but the tropicamide didn’t show those results so he dropped that theory.


Billy A. 22 Jan 2018, 01:49

Weirdeyes

To complete, my co-worker is +3 and +7.5 with some low cyls and she had the same trouble as you described on the topic "Lenses"


NNVisitor 21 Jan 2018, 20:26

Weirdeyes

When I get my eyes checked the assistant will use the autorefractor. Afterwards the opthalmologist or optometrist will test my vision doing the better or worse routine. This takes quite a while so it seems like the autorefractor just gives a general estimate which turns out to not be precise. In my case the examiner will accept the subjective results always no matter which doctor does the exam.

I've had the drop put in my eyes on most visits. The doctor will always wait until my pupils are large before checking my eyes and my vision. In my case the drops make it easy for them to see inside my eyes. I am nearsighted with astigmatism so I'm assuming that the drops don't have the same effect as in your situation.


Billy A. 21 Jan 2018, 13:01

Weirdeyes

Thanks for sharing your experience. Maybe every autorefractor is different, like every person is different.. But what is interesting, if you use the same autorefractor in the morning / afternoon / evening or before / after work, you will probably get different numbers. The same case with contacts, 30minutes after taking off gives you different numbers than 1 hour after, 3 hours after is also different. My co-worker has as simillar trouble as you have, she was freaking out about it... So i advised her to find optician who doesnt use autorefractor and make eye test like tens years ago, when the opticians had NO autorefractors. Luckily, she found one optometrist interested to "old school" eye tests. She said the test was terribly long and exhausting, but she got the results, what she is absolutely satisfied wherewith, after years of "trying" corrections. You should try the same way :)


Weirdeyes 21 Jan 2018, 12:08

Billy A

Maybe. Autorefractors are incredible inconsistent for some people. Some overminus, some might add too much plus and a lot add too much or not enough cyl. On one autorefractor I got R+2.25 -0.75 L +2.25 -1.50 when I was wearing a +3.25 contact lens. When I took the contact lens out I scored +4.50 -1.50. If autorefractors were more consistent I would have gotten +5.50 -1.50. On a more recent autorefractor I got R +0.50 -0.25 L +3.50 -0.75. That made the ophthalmologist think I have perfect vision on my right eye even though it’s definitely less than sharp. The cyl is definitely too low here. My right eye sees 20/30 while my left can see about 20/50. The autorefractor reading I got recently does look a lot like an old prescription I used to have. My current prescription is R +0.75 -0.75 L +4.25 -1.50. A lot of ODs are heavily biased towards autorefractor readings.


Billy A. 21 Jan 2018, 11:30

I'm little bit confused about my last eye test. My RX is for many years

L -0.25 R -0.25

(So I'm wearing overcorrection -5.25, sometimes GOC -12)

I can read 20/20 line without any correction, everything is absolutely clear. But I went to another optometrist to make eye test, one month after my last.. just for fun. What surprising when she told me I'm

L +0.25 R +0.25 +0.25 axis 100

This test was the same way like other tests before, my vision is as same as before.. Was this autorefractor malfunctioned, or what? Can someone understand this? :)


Mister Roberts 18 Jan 2018, 13:42

Has anybody used EyeQue cell phone self eye exam device? If so I wonder if it could be used for GOC Rx?


George1968 17 Jan 2018, 15:45

JenD,

How often were you wearing your glasses before this prescription? Had you already been fulltime? If not, how are you adjusting to fulltime wear (I am assuming with the new prescription you are now a fulltime wearer).


 16 Jan 2018, 15:10

What is the maximum prism that can be obtained by decentering

a 52mm -4 lens?


Josh 16 Jan 2018, 15:02

Hi JenD, if you want to know more about your eyesight i invite you to join to lenschat.com then you can chat about your vision and glasses.


JenD 16 Jan 2018, 14:40

Thanks, the doctor didn't know exactly how long it had been. I just said that it had been a while. She kept asking if the image was too sharp and clear.


Soundmanpt 16 Jan 2018, 14:13

JenD

Thanks that is a big help. Okay you even included the fact that yoo're in

grad school and doing a lot of reading. Doing close work is helpful for people trying to induce myopia. Now in your case you weren't trying to do that but it doesn't matter the result is the same. In other words so much reading has probably helped to make your eyes a bit more nearsighted.

Also if it has been 2 - 3 years since you were prescribed with your -1.50 glasses going up even by -1.25 isn't out of line at all. Yes of course it is nearly twice what your glasses were but that's only because your prescription wasn't all that strong to start with. Needing an increase of -.50 per year is about normal really. Honestly i don't know why your doctor was freaking out. The increase wasn't all that much and only about average considering how long it has been since you got your other glasses. You say you're in your early to mid twenties so it's very normal for your eyes to still be changing and the added strain of extra reading is sure to add to that as well. so nothing that should make the doctor freak out.

Also if I were you I would insist on the doctor to give you -2.75 -.50 157 / -2.75 -.25 28. in your new glasses. For the difference of only -.25 it doesn't make any sense to only give you -2.50 knowing tha your going to be slightly under prescribed. That means it will be much faster for you to be returning for new glasses because you're are too weak. Your young i'm sure that your eyes won't have any problem adjusting to either -2.50 or -2.75 glasses the same way.


JenD 16 Jan 2018, 13:43

It's been quite a long time. Maybe 2-3 years. I'm in my early/mid 20s but I read a lot for graduate school. She said the prescription was probably closer to -2.75 -0.50 but she likes to give people a lower power. Should I get the thin lenses? She said I might need them now.


Soundmanpt 16 Jan 2018, 13:28

Marianna

Okay I think I can help you with understanding the numbers on his prescription slip.

The OD stands of his right eye and the OS is for his left eye.

The SPH is is distance. In his case he is farsighted meaning that his glasses are mostly for helping him see things close up better. His right eye is considerably better than his left eye. The higher the number the stronger the lens. But in his case the SPH really is for his distance. In other words he needs this for things like driving a car. The CYL means he also has astigmatisms which si the shape of the internal eye. not something that you would be able to see by looking at his eyes. Again his right eye is better than his left eye there as well. Axis is not a power number but just to tell the angle the lenses needs to be positioned. The next thing is prism and he apparently only has prism in his left lens of his glasses. This is harder to explain but it means that lens is made in way to force his eyes into a certain position. How the add is in the bottom of his glasses and it is for reading from say a book. So it is even stronger than the SPH is because it is in addition to the SPH numbers you see. Since you're fascinated by your boyfriends glasses i'm sure that you tried his glasses on yourself. I doubt that you were able to see much with his glasses on and you shouldn't ear his glasses for very long because that prism can do nasty things to someones eyes that don't need prism. But because you probably can't see very well wearing them I don't thing you will have them on long enough to do any harm to your eyes.


Soundmanpt 16 Jan 2018, 13:09

JenD

Okay that helps but I ask once again how much time has gone by between these 2 prescriptions. That makes a lot f difference. If it has only been a year then going up a full diopter is quite a bit, not terrible though. But if it has been 2 or 3 years in between then your eyes didn't really change much from year to year.

i can tell you that at -1.50 you were around the point of starting to need your glasses full time. At that point it was up to you if you wanted to wear glasses full time or not. Now you really should be wearing glasses full time. Again though I really need to know the time frame of both prescriptions to answer you better.


Josh 16 Jan 2018, 12:54

JenD

I guess you didn´t wear your glasses fulltime, that way i could say you didn´t notice how bad your eyes really were, now it´s time to go fulltime, could you tell your age?


Andrew 16 Jan 2018, 09:22

JenD,

Many years ago, I had a similar jump in my prescription. As I was a student at the time, it was described to me as being at the upper limit if “normal.” It had also been a year since my previous sight test (if not a little longer). I don’t know how long you left it between eye tests, but if the optician did not ask to see you rather sooner than before, it might be a good idea to go back in six months rather than leaving it a year (or more). Age and occupation can also be a factor.


JenD 16 Jan 2018, 03:33

Forgot to post the new prescription!

It is

-2.50 -0.50 157

-2.50 -0.25 028


Weirdeyes 16 Jan 2018, 00:47

Mariana

They are plus lenses which magnify your eyes. Your boyfriend is farsighted. A normal eye relaxes for distance, but uses the ciliary muscles to focus up close. Someone who is farsighted has to use the ciliary muscles to focus at all distances. So they might be able to see clearly at all distances. Unfortunately this causes eyestrain. Since your boyfriend has bifocals I assume he probably can’t focus very much anymore. That means his vision is probably blurry at all distances. He has astigmatism, which makes things blurry and distorted at all distances. Since he has base out prism that means his eyes have a tendency to cross. Out of curiosity do his eyes look different sizes when he wears glasses? I have a somewhat similar prescription and I worry about that.


Marianna 16 Jan 2018, 00:18

Always been fascinated by my boyfriend's glasses. They magnify his eyes and came across this site so I can get a better understanding of why. I found his prescription and this is what is written on it. I would really appreciate if someone will tell me what it all means.

OD

SPH +2.50

CYL -0.50

AXIS 105

ADD 1.50

OS

SPH +4.00

CYL -1.25

AXIS 135

PRISM1 6

BASE1 BO

ADD 1.50

Thanks


Josh 15 Jan 2018, 20:50

JenD, for what you said your current rx is around -5, so it´s wise what dr said, very dangerous driving without correction, even with your current glasses you are very nearsighted. make sure to get your new glasses soon.


Soundmanpt 15 Jan 2018, 13:56

JenD

We can't really answer your question because you didn't provide what your new prescription has increased to? It sounds like you had a really big increase the 20/400 doesn't really help. also how long ago was it when you got the -1.50 -.25 160 / -1.50 prescription?


JenD 15 Jan 2018, 13:25

Is my vision really a lot worse?

I just had an eye exam and my doctor was freaking out a little about how poorly I see in my current glasses. She said I wouldn't be legal to drive with them on and my vision has worsened to 20/400 without glasses. She was definitely quite surprised that I didn't get new glasses sooner and kept saying that the image with my new glasses on might be really sharp and take a while to adjust to. She also said that she didn't give me an extra step in power because the change was already quite big. Is she exaggerating?

Old prescription: -1.50 -0.25 160; -1.50

New prescription is attached.


GreginColo 12 Jan 2018, 06:03

Paul, just curious about how the latest exam went for your older son. Thanks in advance for the update if you choose to provide one.


Puffin 08 Jan 2018, 15:28

Katie,

Glad to hear Maddie is adapting to her glasses and suddenly much clearer vision.

And that word "adapting" is important, because it doesn't happen overnight; it's as if her visual system needs to be coaxed from ignoring the useless fog in the distance to deciphering what can now be seen. So that's one reason why Maddie isn't given the full (assumed) prescription right away - the results of such a sudden change (from fog to clear-ish) are not always predictable, so it is wise to be cautious. It's not as if she needs to drive a car, and correcting most of her myopia is a lot better than nothing.

The ECP is also trying to avoid overcorrecting Maddie's vision, thus making her hyperopic (ie the opposite situation to hers). This would bring other difficulties such as eyestrain and/or a squint (a turned in eye) which would be problematic to resolve. So, caution first, avoid overcorrection, give her most of her prescription and see what happens.

As for her level of myopia, well some decades ago I thought anything over 10 dioptres just didn't exist - I was initially surprised when I read about cases over that level. Since then I've spent many years reading about vision and by now there's not much that surprises me.

I have read of a case of a woman who was born with ~17 dioptres of myopia in each eye but her prescription did not change that much as she grew into adulthood, only by 5 or 6 dioptres, which is not that much of an increase.

So don''t worry. Let Maddie get used to seeing, and let the ECP decide what to do in six months time; by then the situation will be clearer, in all senses.


 08 Jan 2018, 13:14


Katie 02 Jan 2018, 23:59

Maddie's first day with glasses was great! It was like the glasses gave her joy, and put a spark in her day, not to mention, she looks cute as a button with her little glasses. I was a bit nervous about her needing glasses so young, especially because of the high prescription, but after watching her today, I can'y complain. I can only imagine how much life her full prescription will give her. Plus, she starts vision therapy Thursday, hopefully that will help her too.


Cactus Jack 02 Jan 2018, 16:25

Katie,

I think in a few days, Maddie, will start becoming a different child. Her world has been very small, but there is no way she could have experienced what it is like to really be able to see things.

It may happen as soon as bed time tonight, but don't be surprised if she cries when you take her glasses off and may cry until you help her put them on in the morning.

It is common for a first prescription to be under corrected in young children. It makes it easier for them to learn to see.

Remember she has a whole world to discover. In a few days she will be playing catch up. Help her to discover that world.

C.


Soundmanpt 02 Jan 2018, 14:47

Katie

Cactus jack has been providing you with very good advice so i don't wish to enter into that at all. But I will say the reason Maddie is keeping her glasses on is because even at 3 she is able to see the improvement that her glasses are providing her. If they were helping her you can be sure she might not be so willing to wear them.


Katie 02 Jan 2018, 14:08

I took Maddie in to get her new glasses today. Because they saw how I was not sure of her glasses or preacription, they were kind enough to take us back in to the examination room to show me that maddie, is actually very nearsighted, and that while her current glasses will help her see, she actually needs an even stronger prescription.

We have been home a few hours now, and Maddie does not seem to mind her glasses at all. She has kept them on this whole time, and I can see the difference, she seems more smiley and active. She is actually playing around.


Paul 01 Jan 2018, 15:49

Cactus I really appreciate you taking the time to give a detailed answer.

I fear what you say will be close to the eyetest result on Wednesday. Malc carefully tried on his brothers' glasses and can see the TV clearly with both, he thought Jack's better. The previous under prescription and degenerating vision means we have to expect a massive increase.

I expect the cross eyes will also need attention. Poor lad also has astigmatis. A lot to bear for a 4 year old.

In our home he fooled us all. Only when out and about did we realise the extent of the problem.


Cactus Jack 01 Jan 2018, 14:57

Paul,

Motion sickness is typically caused by a difference between what your eye are seeing and what your semi-circular canals are feeling.

The brain often compensates for problems with one sense (vision) by developing another sense to extreme levels. Sometimes is is hearing, but Malc may have developed very high sensitivity to balance signals from his semi-circular canals. When I was young, I absolutely could not read in a car, without getting nauseous.

I think his Myopia has increased enough, that looking out the windows of the car is a waste of time.

It appears that you like to work in English measurements rather than Metric. Here is a simple formula for calculating effective lens power. Just divide the distance in inches into 40. It is not exact because 1 meter = 39.37 inches, but close enough. If Malc is holding something about 6 inches from his eyes to see something clearly with his glasses, it means that he needs about, 40 / 6 = 6.66 diopters, more correction in his glasses. The calculation is not very exact in this case, because of Vertex Distance effects with high prescription glasses. I suspect Malc needs somewhere around -16 of correction. Because of Vertex Distance effects, that would require glasses in the -20 range to produce -16 at his corneas. I don't know if Jack's glasses are large enough to allow Malc to try them, but it might be an interesting experiment to let Malc try them and ask what he can see with each eye individually. Also, if you have any of Malc's weaker glasses you might asking him what he can see wearing them over his -10 glasses.

It is very sad, but a fact of life that your boys are very Myopic. I would suggest that you and your brother should look on the bright side of a bad situation. We live in an age of incredible advances in understanding genetics, sequencing genes, and on the threshold of being able to correct genetic problems and also correct gene related health problems. Hopefully, these advance will benefit your boys in the future and their Progressive Myopia can be stopped in the near future and perhaps even reversed. The important thing right now, is to give the boys the best possible vision. Vision is the most important factor (80%) in learning.

When you say that Malc keeps loosing his glasses, is he misplacing them or purposely taking them off? It may be that they are just not providing enough benefit ti be worth bothering with.

It is pretty common to under prescribe first glasses if the prescription is high. Children with high myopia typically do not know how to use their Ciliary Muscles (Focusing Muscles) for focusing close and they have to learn how to do it. Once they develop the ability to use their focusing muscles, most ECPs will prescribe full prescription for distance. However, in the case of Progressive Myopia, some ECPs will prescribe bifocals or separate glasses for read in the hopes that it will minimize the rate of increase. There is a theory that the focusing effort stimulates eyeball growth and increased myopia is the result.

You did not mention that Malc is having some problem with his eyes crossing. I mentioned that my background is Electronic and Computer Engineering. i have studied and tried to analyze how the Eye Positioning Control System works because I also have a problem with my eyes trying to cross. Typically, children with very high Hyperopia or long sightedness have more problems with their eyes trying to cross than children who have high Myopia, Like Malc, Jack and Will. I have a theory that is pretty involved. I will try to explain that in my next post.

Again, I hope this is helping. Please feel free to tell me if you are having trouble understanding any of this.

C.


Paul 01 Jan 2018, 09:53

Hopefully someone can help to put our minds at rest.

Malc is causing concern. Yesterday we drove south to catch up with my brother home from France for Hogmanay. Malc was very car sick both ways, he has not done that since he first got glasses, he didn't look out of the window, just held a picture of his favourite character right infront of his nose.

He loves Uncle Brian, my brother, but when we got to the house he seemed to be confused which man was his uncle. He made no smiles until Brian came over and picked him up.

Brian hasn't seen the twins since they got their glasses and when the two of us went for a short walk he cried when talking about the sight of his two nephews wearing such thick strong glasses. Brian asked if Malc 's vision was poor again. He had given Malc a pack of playing card of his favourite cartoon pictures and he only recognised them when he held the cards very close. Brian tried to play snap with Malc and Malc got everything wrong and kept lifting the card nearer.

We drove home this morning and there were two cars in the driveway, Malc asked which one was ours.

Since getting home I have tried to be calm but have been testing what Malc can see. It seems he needs to hold the cards about 6 inches or less before he recognises the picture.

The past six weeks have been manic. The twins got their glasses, work at the shop long hours before and after Christmas, a flu bug hit the kids. I feel guilty to say we have not been over concerned until yesterday. Malc keeps losing his glasses and after reading below it maybe they just don't give good vision any more.

I thought the doctor said they would not under prescribe Malc last time, could I have misunderstood and this coupled with worsening vision means he just cant see well now.

Thankfully we changed his visit for an eyetest to this Wednesday, I am anxious what strength glasses he will now need. The doctor has said his condition is pathologically progressive and they hopefully could slow things down. I know his eyes have become a lot more crossed recently.

What sort of increase is likely in 6 months? How strong do they make glasses suitable for him to wear to get good results?

Sorry to ramble on but we are now worried.


Cactus Jack 31 Dec 2017, 16:54

Katie,

I was working on the post below, off line, and did not see your additional questions.

I am not surprised that your ECP under corrected Maddie. i should have mentioned that as a possibility.

There can be several reasons why full correction for for high Myopia does not provide 20/20 vision. The most obvious one is what Weirdeyes mentioned. Vertex Distance effects cause all kinds of thing to happen to the images delivered to the eye. The most obvious one is minification of the images, which you experience with your prescription. There is another VD effect related to the distance of the back surface of the glasses from the Cornea. The farther a Minus lens is from the Cornea, the less effective it is. For example, a -18 lens 10 mm from the Cornea has an effective power at the Cornea of -14.75.

The minification effect makes things smaller on the Retina. The Retina has millions of Rods and Cones, but only about 1 million nerve fibers in the optic nerve. The Retina does preliminary image processing to compress the signals from the rods and cones and if something is very small, it may get lost in the compression process. Not unlike what takes place in a digital camera. That means that a person who wears very high minus glasses Visual Acuity, even with perfect correction, drops below 20/20. Contact Lenses have Zero Vertex Distance, so the image is not minified very much and better Visual Acuity results.

Another factor affecting VA is that if the eyeball gets elongated too much, the Retina can get stretched and that can cause distortion with the risk of Retinal Detachment.

Maddie is much too young to wear contact lenses.

C.


Cactus Jack 31 Dec 2017, 16:12

Katie,

You have the numbers right. However, Your Astigmatism is very significant while Maddie's is pretty much a nuisance. I suspect your Sphere prescription has stabilized and your Axial Myopia is not dangerously high. Maddie needs to be monitored by her ECP to be aware of Retinal Detachment as she gets older.

The problem is not with her eyes, but her genes are the likely cause. Axial Myopia is caused by a mismatch between the PLUS power of her eye's lens system or the length of her eyeballs. Either one, or both together, can cause Myopia.

Unfortunately, there is no simple way to estimate a 2 or 3 year old’s refractive error without optometric tools.

An Eye Exam has two parts. The Objective part, where the Examiner looks into your eyes with an Ophthalmoscope or an Auto Refractor and the Subjective part, where you tell the examiner what you see. Maddie is too young to be able to tell the examiner what she sees with any accuracy. I suspect they used an Auto Refractor to get close to her prescription.

You can request a re-check of her prescription if it would make you feel more comfortable , but that may not be necessary or even useful. I can almost guarantee that the prescription is NOT exactly correct, but it may be acceptable for the visual needs of a 2 year old. There may be an easier way to tell if the glasses are close to what she needs.

The first thing is to observe her visual habits, can you estimate her recognition distance? In other words, how close does something have be for her to recognize it and reach for it? Does she appear to recognize a close relative by voice sound or clothing color, rather than by sight?

Does she run into things? If the prescription is pretty close, she does not see anything clearly beyond about 3 inches or 8 cm from her eyes.

How does she react to wearing the glasses, after she gets over the strangeness of having them on. Most children initially fight wearing glasses until they discover what they have been missing. From then on, they get upset when they have to take them off. You won’t have to force her to wear them she will want wear them because she has a lot of catching up to do.

In her situation, a weaker pair of glasses won’t slow down her Myopia. She is growing and so are her eyeballs. It might help a little to wear weaker glasses when she starts trying to focus close to read or look at picture books, but you ECP is the person to ask. The most important thing right now is to let her vision develop. Her brain has to learn to see and learn how to use her Ciliary Muscles to focus and how to control her eye positioning muscles.

I hope this helps. Please let us know how she reacts to the glasses.

May I ask where you live? (Country)

C.


Weirdeyes 31 Dec 2017, 13:32

Katie

I’m not an expert in myopia, but part of the reason she can’t see 20/20 with her full prescription is because of minification. Her glasses make things look smaller. Making it stronger will only make the minification worse. Contact lenses help with this.


Katie 31 Dec 2017, 13:26

One more thing, that I don't understand is that the doctor said she will not be able to see 20/20 with her glasses even in 6 months with the full prescription. Why not? Can't they just give her a higher prescription to help her see even better?


Katie 31 Dec 2017, 13:21

Also, I forgot to mention, but it might be important, the doctor is not giving her her full prescription now. She will give that in 6 months, and in three months she will increase the prescription by 2.5 diopters (half of what she took out). Leaving her at -17.5 and -20.25 for her sphere, which is what the doctor said her true prescription is.


Weirdeyes 31 Dec 2017, 13:07

Katie

Plus glasses won’t help at all in her case. She’s already very nearsighted. The theory for wearing plus glasses is to stop you from focusing too much when doing close work. The typical reading distance is 14 to 16 inches. The furthest she can see without glasses is about 3 inches. What might work is a reduced prescription for close up work, but that’s generally not necessary.


Katie 31 Dec 2017, 12:41

So, I assume that makes Maddie's -13.5 and -16.75 along the short axis. This still makes her prescription higher than mine, and there is a 25 year age difference. Plus the fact that she is only 2 and this is her first pair. Is there something wrong with her eyes that is making her vision so bad? Also back to my initial question. How do I know if this is her actual prescription and not a mistake? Because her prescription is awfully high. Also, when the glasses come should I make her wear them all the time, won't that just make her eyesight even worse? Should I get her a weaker pair to wear all the time so her glasses do not cause her already bad eyesight to get even worse? Along the same line, should she wear a pair of + or reading glasses for reading and other close work when she gets older to help keep her eyesight from getting even worse than it ultimately naturally will?


Cactus Jack 31 Dec 2017, 12:01

Katie,

You have substantially more astigmatism than your younger sister, along with your Myopia. You said your sister has a different father. I suspect you both inherited a predisposition for Myopia from your common mother.

Myopia and Astigmatism have different causes. Axial or True Myopia is caused by a mismatch between the total PLUS power of the eye's lens system and the length of the eyeball. Astigmatism is typically caused by uneven curvature of the front surface of the Cornea.

The Axis angle is the Long Axis of the Cylinder correction. The Cylinder power on the Long Axis is 0.00. However the Cylinder power along the Short axis (90 degrees from the Long axis) is the power listed.

Your lens powers are

-9.25 along the Long Axis and -13.25 along the Short Axis

and

-8.75 along the Long Axis and -14.50 along the Short Axis

C.


GreginColo 31 Dec 2017, 11:24

Paul,

No doubt you know your boys will have some visual challenges as they grow up, but good these were caught early while much on their early development is occurring. As you have already, seen Cactus Jack is a wealth of information to supplement what you learn from your ECP.

If I am recalling correctly, there was a similar post some while back from a mother, i think in the UK, whose youngsters, forget if they were boys or girls or a combination, had early high myopia similar to your sons. I think she posted under the name "Concerned Mama" if a recall correctly. I don't recall any recent posts from her, to see how her kids are progressing, but that might be a possible resource for you.

There is a lesser known US actor named Jon Tyler, who has been very open in sharing some about his visual history and need for strong myopic correction, if I recall beginning around age 2, similar to the Rx of your younger guys. In his case one of his siblings was also very myopic, but two others had fairly normal vision, so its weird how genetics work.

Do you know the Rx of of your boys' ancestors with myopia, and at what age they started needing glasses. Also do the boys have cousins from the the same ancestry, and if so, how is their vision.

I know it may seem overwhelming, and no doubt scary, at the time but you seem to be asking the right questions and getting the right help for your sons. Best wishes to you and your family.


Cactus Jack 31 Dec 2017, 11:20

Paul,

There are some excellent eye hospitals in the UK. One of the best in the world is Moorfields, in London.

Thanks for the info on your education. I'll try to not get too deep into the math and physics. If you don't understand something, please tell me.

I don't know how it is in the UK, but for years it was said that you had to have a University degree to be successful. That has turned out to be poor advice, particularly if you spend a lot of money and get a degree in a field that is not very marketable. The most important thing is to learn how to learn and never stop studying and learning. I graduated from High School in 1954, at that time Computers were "laboratory curiosities". Thomas Watson, head of IBM, said that he thought there might be a market for 12 computers in the world. Of course, back then, the integrated circuit and microprocessor had not even been imagined. My electronics education involved vacuum tubes. I worked my way thru college fixing TVs, mostly replacing burned out tubes. These days about the only vacuum tubes are the Picture Tubes in old TVs, but they have almost disappeared. I had to teach myself about how Computers work and how to apply them for solving problems.

It is very likely that your boys will become more nearsighted, but you and your wife did good by catching it early and seeking care for them. Malc is growing and his eyeballs are also growing which will increase his Myopia. The good thing is that he knows to tell you when he can't see well. You might want to ask his doctor if a reduced prescription for reading might slow the rate of increase.

There is a simple reason why Will lets you know if you get the glasses wrong and Jack does not. Will needs -24 to be able to see pretty well. If he wears Jack's glasses, the difference in the two lenses, are uncomfortable and he does not see very well beyond about 6 inches with one eye and 12 inches with the other. When Jack is wearing Will's -24 glasses, he can easily compensate by using his Ciliary Muscles and Crystalline Lenses (his auto-focus system) to compensate for the extra Minus. Unfortunately, it does not work the other way around. Will (nor anyone else) can reduce the fully relaxed power of his Crystalline Lens to make up for the additional Minus that he needs for distance.

Sometimes, it is desirable to remove the Crystalline Lens (see previous post) in people who are very Myopic, to reduce the Minus Power they need in their glasses.

That can actually improve their Visual Acuity. The explanation for that is a bit complex so lets don't worry about that right now.

The surgery is actually the same as Cataract Surgery. The downside is that they loose their ability to focus. There are solutions for that.

There is considerable R & D being done to improve vision for people who are very Myopic. You boys will likely benefit from future developments.

Your family history and situation might be useful for genetic research. You might enquire if DNA samples from you, your wife, and your boys would be helpful in identifying the genes that cause extreme Myopia. Obtaining a DNA sample is a painless swab from inside the cheek.

Let me know, if you have more questions.

C.


Katie 31 Dec 2017, 08:46

I am 27 and my prescription is -9.25, -4.00 and -8.75, -5.75.


Paul 31 Dec 2017, 05:46

Hi cactus,

Thanks for the reply. Jack and Will are identical twins and see the same eye doctor at the hospital who sees Malc. We live in Northern Scotland. My education suffered as we started a family so young and I continue to work in the same supermarket in Elgin.

I fear that all three have a condition which will get worse, how bad can it get? We have brought forward Malc's eyetest to next week as he says he cant see the TV unless he sits right up close. He has an ipad and holds that very very close too, we were told to watch out for that. His last new glasses were in June.

We try to be very careful with the twins but sometimes I get the glasses the wrong way round. Wills lets me know straightaway but Jack doesn't seem bothered. Without glasses they just lie still but with glasses they are into everything. They are retested end of January.

The doctor says the twins are the most severe he has seen in 30years and says when older they may operate to remove the eyelens, I think that's right.


Cactus Jack 31 Dec 2017, 05:16

Katie,

May I ask your age and prescription?

C.


Katie 31 Dec 2017, 00:13

Hi, thanks for getting back to me. My sister is almost 3. I am not sure about her dad's side of the family, but on our mom's side, there is me, our grandma and an aunt and an uncle. Another thing that had me worried was how different her eyes are, but I reading what you said to Paul, I guess it is not much.


Cactus Jack 30 Dec 2017, 22:33

Paul,

One other comment. There is not that much difference between Jack's and Will's prescription. It seems like a lot, but if the cause of the myopia is the distance from the Crystalline Lens to the Retina, there is less than 1 mm difference between -21 and -24.

C.


Cactus Jack 30 Dec 2017, 22:25

Paul,

Unfortunately, It appears that your boys are the exception to what I told Katie. Hyperopia sometimes gets better, but Myopia typically increases as a child grows.

The eyes are biological cameras and the optics of the eyes obey the Laws of Optics codified by Sir Isaac Newton, of gravity fame, over 300 years ago.

Occasionally, babies are born with Myopia. It appears that in your boys case, there is a genetic link from your wife's father and from your father's father.

I have several questions I would like to ask. They are not personal questions, but if you would prefer to answer privately I will provide an email address:

1. Where do you live? (country)

2. What is your educational background in math and the sciences? (helps me answer questions)

3. Are your boys under the care of an Eye Care Professional who specializes in High or Progressive Myopia?

4. If so, has there been any mention or explanation of the optics of the eye or the usual causes of Myopia?

5. Are Jack and Will identical or fraternal twins?

A couple of comments:

The 3 diopter mismatch in Jack's eyes are nothing to get very excited about. The eyes develop independently and not common to have exactly the same prescription in both eyes. I suspect Will has some difference, but at 1 year old there is no way to determine what it is exactly using an auto-refractor or an Ophthalmoscope. The important thing is to provide them with correction that allows them to see, with reasonable clarity, objects that are more than about 5 cm or 2 inches away. Without his -10 glasses, everything is very blurry for Malcolm beyond about 10 cm or 4 inches.

By the way, I am 80. I am NOT an Eye Care Professional (ECP). My background is Electronic Engineering and Computers (IOW, Problem Solving). I studied Optics in Physics and became seriously interested in Vision, when I was told by ECPs that a particular problem I had, could not be corrected. I did not believe them and started working on the problem with an understanding ECP. Turned out it could be corrected and the ECP and I became friends. He thought I should be teaching.

I guess you could call me an Amateur in the original French sense, as one who studies a subject out of Love of Knowledge about the subject.

I would like to find you to easy-to-understand explanation of the optics of the eye. I had a link to a paper that was excellent, but when the hard disk crashed, that was one of the things that was lost. I will look for a good explanation.

I will try to explain, in words, until I can find some easy to understand illustrations.

The eyes are similar to high end Digital Cameras. The lens system actually has 4 elements that contribute to the total PLUS power of the system. From front to back the lenses are:

1. The Cornea - Fixed Focus and normally strong PLUS (in adults about +40 diopters)

2. Aqueous Humor - Fixed Focus and normally weak PLUS. So weak it is typically ignored in most explanations.

3. Crystalline Lens - Variable Focus. About +20 diopters when relaxed for distance. The Ciliary Muscles can typically squeeze the Crystalline Lens to increase its power to more than +33 diopters in children to allow them to focus very close.

4. Vitreous Humor - Fixed Focus weak PLUS transparent gel. It is typically ignored also.

The Retina is like the film or Digital Image Sensor in the camera.

Note that all the lenses are PLUS lenses and the total varies with the individual. In a adult the relaxed total is around +59 diopters.

The most basic law of optics is pretty simple. It states that a +1.00 diopter lens will focus parallel rays of light from a distant object at a distance of 1 meter, 100 cm or 1000 mm. Mathematically, it is expressed for our purposes as: Lens Power in Diopters = 1000 mm / Focal Distance in mm.

An adult eye is about 25 mm (1 inch) in diameter. The lenses are inset into the eye and the typical distance for a person who does not need any correction is about 17 mm. If we divide 17 mm into 1000 mm the result is about +59 diopters Sound familiar?

If the eye is smaller than 25 mm or 1 inch, as it is in a baby, the distance from the Crystalline Lens to the Retina is much less than 17 mm and it takes more PLUS to focus closer. Normally, a baby will learn to use his Ciliary Muscles to supply that extra PLUS in a month or so.

Optically, there can only be two causes of the high Myopia. Either their lens system is much stronger than than what is required or their eyeballs are a bit longer (larger than is typical).

I hope this makes sense. I look forward to your response. If you would like to chat privately, my email address is cactusjack1928@hotmail.com

C.


Paul 30 Dec 2017, 19:21

We are young parents, I am 22 my wife 21. We have three lovely boys. Malcolm just 4 and one year old twins, Jack and Will.

We noticed Malc bumped into things when he started to walk, turned out he needed glasses. His prescription has got worse and he now wears minus 10 glasses. He likes them and is no problem.

The twins seemed to pay no attention to faces when smaller and they are also now wearing glasses but much stronger. Jack has mismatched eyes one minus 18 the other minus 21. His brother Will has a staggering minus 24 both eyes.

Neither my wife nor I wear glasses. My late father in law was very short sighted as was my paternal grandfather. No other family members wear glasses.

I am hoping from what you say Cactus that their visions will improve as they grow older.


Cactus Jack 30 Dec 2017, 18:09

Hi Katie,

How old is your sister? Does myopia run in your family? High Myopia usually has a genetic component.

C.


antonio 30 Dec 2017, 17:52

Is your younger sister blinder than you without glasses ? Just test it. If not the doctor might have confused prescriptions.

How far can your sister identify a designed animal on an image clearly. Write here and we can calculate . How near does she hold a picture book to her eyes ?

Best regards Katie, antonio


Confused 30 Dec 2017, 16:53

Hi, my name is Katie, and my younger sister just got prescribed glasses for the first time. I also wear glasses, have most of my life, and am pretty nearsighted, or so I thought until my sister got her prescription. I think the doctor made a mistake. Her prescription is higher than mine. Anyways, this is her prescription: Right eye: -12.5, -1.00, 70 and left eye: -15.25, -1.5 and 025. How do I know if her prescription is correct? Without taking her in for another appointment? The prescription just seems awfully high for a kid. Any thoughts?


Cactus Jack 30 Dec 2017, 16:34

Joey,

I suggest you read "how to Study for an Eye Exam" before your appointment. Complaining that your vision is worse in low light condition is also a good complaint.

C.


Joey 30 Dec 2017, 11:24

Hi,

I got glasses 2 years ago for a tiny prescription of -0.25 and -0.25 cyl -0.50. I am going for another appointment and am wondering if i say im having troubles seeing at night would they increase it? I plan on saying red is clearer once as well.


Cactus Jack 23 Dec 2017, 20:00

Jack,

With a prescription of -1.00 it is optional, with one exception. If you drive, you should wear your glasses. That said, once you get over the apprehension about wearing glasses and have worn them for a week or so, you may decide that you really like seeing distant objects clearly and it is easier to just wear them all the time.

Glasses are nothing more than tools to help you to clearly see small things beyond 1 meter. You already use tools because of other limitations and think nothing of it. There are two reasons you wear shoes, but the most important one is to keep the rocks from hurting your feet. One of the reasons you wear clothes is that your fur is not thick enough to keep you warm in winter. If you have occasion to drive a nail, you use a hammer to keep from hurting your hand.

By the way, don't think for a minute that others have not noticed that you need glasses. I suspect that you have the symptoms of not seeing distant things very well and you will likely hear a comment or two, that you finally got glasses.

Just remember that millions of people wear glasses and probably 95% had the same apprehension about what other people will say, I know i did. Another thing to remember, is that you wear vision correction for YOUR BENEFIT, not for the benefit of others. They don't get a vote in your decisions.

C.


Likelenses 23 Dec 2017, 16:51

Jack

Your prescription is not really all that strong.Most first prescriptions are -.50, or -.75. However most first prescriptions are people in their pre teen to teenage years.

You would fall into the late onset myopia category, and although you will eventually NEED to wear full time, your prescription should not get above -3.00, or so.

In your occupation , you most likely spend a lot of time with near tasks, so you may have pseudo myopia, which exhibits the same symptoms as axial myopia,and requires minus lenses to see distant things clearly.

My own Myopia began at eighteen with a -1.00 prescription, and now at forty it is -10.5.In my case I probably needed glasses,at around age fifteen.


Jack 23 Dec 2017, 12:27

Thanks for the advice. Increasingly blurry after 1 metre is a good description. Wearing full time for 10 days sounds daunting, but I'll give it a try. Do people with this prescription usually wear glasses full time?

Is it a strong first prescription? I'm based in UK and work in Marketing/IT.


Cactus Jack 22 Dec 2017, 23:13

Jack,

Welcome to ES.

Yes, you should wear them quite a bit more, at least initially. Your prescription of about -1.00 in both eyes means that everything beyond about 1 meter or 40 inches is increasingly blurry. You were missing a lot of details. I suggest wearing your glasses whenever you are awake (i.e. full time) for 10 days to 2 weeks and then making a decision about when to wear them.

Vision actually occurs in the brain. Your eyes are biological cameras. The brain has amazing ability to do image processing and can correct blurry images, IF it knows what something is supposed to look like. The snag is that it take a lot of effort and energy. In fact the brain does not need any visual input to create images. Ever had a dream?

Wearing your glasses full time for 10 days to 2 weeks will allow your brain to develop a new image processing algorithm that works well with high quality images that have been optically corrected. When that happens, your vision without your glasses will appear blurry. That makes some people think that their glasses have made their vision worse. That is not correct, your brain has effectively stored the old algorithm and is using the new one. If you stoped wearing your glasses, in a few days it would revert to the old algorithm, but it might complain some to tell you that it really prefers the new one.

I urge you to wear your glasses around friends and family over Christmas. That is a great time to let them make their comments, try on your glasses, get used to your new look. After a day or two, the only comments that will occur will be if you get a new frame style or are not wearing them.

If you have the time and are interested, I urge you to check out Macrae’s Story on the https://vision-and-spex.com/fantasy-and-true-stories-about-vision-glasses-f7 website. It is a rather long Saga about one of our new (at that time) member’s adventures with hyperopia and presbyopia. I think you may find it humorous. He was also very nervous about his family finding out that he needed glasses.

Please let up know if you have any questions that we can help you with.

May I ask your occupation and where you live?

C.


Jack 22 Dec 2017, 15:22

Got my first prescription glasses today, age 29. It says -1.00 -0.25 5 left and -1.00 -- for right. Everything is so sharp with them in the city - all the details I was missing out on. Nervous about wearing them in front of family over Christmas for first time, but I'm sure it will be fine after a while. Optician said to wear them for night driving and cinema, but I think I need to wear them a bit more.


Plus Tony 17 Nov 2017, 06:45

Hi StephG

I noticed that it is a couple of weeks since your kids got their glasses. How are they (and you!) getting on?


StephG 02 Nov 2017, 10:47

The kids got their glasses about an hour ago. And all of them wore them to school afterwards. I told them to at least give their glasses a try for the rest of the day and then I will leave it to them (the older two) to make the right choice on whether or not to wear them tomorrow or how much they want to wear them. The doctor said to make sure #3 wears glasses all the time and same with #4. He also made me schedule #3 and #4 appointments for January.

Also I just realized I never answered Cactus question, but #1 and #4 are girls and #2 and #3 are boys


Soundmanpt 02 Nov 2017, 10:42

StephG

If you don't mind me asking which is which as far as prescriptions go. I mean which prescription is for the 13 year old and so on? I have a feeling the weakest prescription might be for the 13 year old. It would be most helpful to get the older one wearing his or her glasses because that would be a big help in getting the younger ones to his or her lead. Since you said that you don't know anything about glasses I assume that you don't wear glasses yourself. If you have trouble trying to get your kids to wear their glasses you may need to go on line and order yourself a nice pair of glasses. You can get really great looking glasses on-line for Zenni (zennioptical.com) for under $13.00. You could even add on the optional AR coating (anti-reflective) for another $5.00 which is very helpful with eliminating glare and reflections form your glasses. Just order them as non-prescription. If the kids see you wearing glasses that will help make them much more self confident about wearing their own glasses. Also by you wearing glasses you will have a much better understanding about glasses.


StephG 01 Nov 2017, 20:14

Well the kiddos glasses will be ready for pickup tomorrow. No surprise they are not excited. Will see how it goes.


StephG 30 Oct 2017, 16:25

#1 is 13, #2 is 9, #3 is 6 and #4 is 2.

As for history there is a history of cataracts in my hudband's mom's side, and one of his brothers wears glasses all the time as do two of his kids and one wears them to read, and his sister's kid only wears glasses for TV and other things here and there. My husband has reading glasses (he has had them since he was 8), but does not really need them. On my side, my great grandma had cataracts, and I have one niece who wears glasses all the time.


Cactus Jack 29 Oct 2017, 19:23

StephG,

Could you tell us a bit more about the kids, such as age and gender. Sometimes Nearsightedness and Farsightedness have a genetic component. Are there any vision problems in their parents or grandparents? That will give you an idea of what to expect in the future and how closely you need to monitor their vision.

C.


StephG 29 Oct 2017, 18:36

Weirdeyes,

Thank you, for your explinations. The kiddos glasses should be ready this week. It is nice to know how much they need their glasses.

- Steph


Soundmanpt 29 Oct 2017, 12:37

StephG

I completely agree with "Weirdeyes" about those kids various prescriptions.


Weirdeyes 28 Oct 2017, 11:10

StephG

-0.50 and 0.00, -0.25,130;

This kid barely needs glasses. He/she has some pretty mild nearsightedness and astigmatism. Glasses might improve distance vision a bit, but don't be surprised if the glasses aren't worn. It's likely he/she will get a stronger prescription in the future. Maybe it's best not to get glasses for now.

-3.75, -0.50, 080 and -3.00;

This kid is moderately nearsighted. He/she will notice a huge difference with glasses.

-0.25, -0.25, 110 and -2.75, -0.75, 125

This kid has a difference between his/her eyes. To develop good depth perception he/she should wear glasses full time. Even if he/she doesn't notice a difference at first or feels weird.

And lastly -0.25 and +0.25

This is pretty much the mildest prescription possible. He/she doesn't need glasses.


StephG 28 Oct 2017, 10:38

Hi, can someone explain the following prescriptions for me. They are kids' prescription, I know very little about glasses, but would like to know what is going on with their eyes. Here they are:

-0.50 and 0.00, -0.25,130;

-3.75, -0.50, 080 and -3.00;

-0.25, -0.25, 110 and -2.75, -0.75, 125

And lastly -0.25 and +0.25

The doctor did explain very little about #3, but I did not completly grasp what he was saying.


Lou 25 Oct 2017, 06:09

Hi Freddie

Thank you very much for the clarification. I haven't personally worn varifocals, but my husband wears them. I believe that fit is very important. I'd suggest going back to the opticians and checking that your glasses fit so that you are looking through the right parts for the respective distances. If so, I'd ask for them to check your prescription again.

I really hope that this will help.

Best wishes

Lou


Freddie 25 Oct 2017, 05:15

Hi Lou

They are varifocals. The optician did say that if I was really struggling to get used to them I could try bifocals as they would probably be easier to adapt to but I don't like the idea of the line. Although with it being over a week and a half now I would have thought I would have gotten used to the varifocals if it was just a case of adapting


Lou 25 Oct 2017, 03:53

Hi Weird Eyes

The part about only plastic or hardened lenses appears to be part of the template of the sheet on which your prescription was hand written, so presumably is just the prescribing preference of the particular optician/company, and is probably on most people's prescriptions, with the exception of somebody who has been recommended lenses of a different material, for reasons relating to their prescription or life style.

Regarding your prescription, I don't imagine that you actually want an interpretation of your prescription, but please let us know if you do.

Best wishes

Lou


Lou 25 Oct 2017, 03:45

Hi Freddie

Can I please clarify that your new glasses are either varifocals (progressives) or bifocals. If they are just single vision glasses with the reading add, then these will be reading glasses only, and you would need a second pair without the reading add for full-time wear except reading. I can't however see a reputable opticians dispensing reading glasses as the only pair to someone who obviously primarily needs distance glasses, so I am wondering whether your difficulties are related to getting used to wearing varifocals for the first time.

Regarding whether 36 is too young for a reading add, in my opinion only, a reading add is not needed until the person themselves is finding difficulty with reading. Even if it makes close reading easier, I personally don't see why it would need dispensing, if the person themselves is not having any problems reading, or any symptoms relating to eye strain from reading, but as I say, this is my personal opinion only.

Best wishes

Lou


Freddie 25 Oct 2017, 03:26

Hi I'm not sure if I'm posting this in the right place but was wondering if someone could give me some advice

I went for my check-up about 3 weeks ago and was told that my prescription had changed and that I would need a new glasses. That's not really a surprise it happens quite often but I was told that I was having trouble with my close up vision and would benefit from having a reading add included in my prescription to help with that. I'd not noticed any issues at all with reading, although I did struggle a bit with the close up chart.

I was also told that while my left eye had gotten worse the vision in my right eye had actually improved slightly.

My old prescription was

L-6.50, - 1.25 R-6.00, -0.50

My new prescription is

L -7.00, -1.50 R -5.75, -0.50 +1.25

I originally wasn't sure whether to go with the add or not but my optician said I would really benefit from them so decided to bite the bullet and do so. I picked up my glasses about a week and a half ago and my vision through them just seemed really strange, nothing seemed like it was fully in focus etc if that makes sense?

I explained this to the staff in the opticians and they just said because the prescription had changed they would take awhile to get used to. It's now been a week and a half and while my vision may have improved slightly through them it still doesn't feel 100%.

Is it possible the optician made a mistake with my eye test? Especially on my right eye with that prescription improving as I didn't think that was something that could happen. Or is it just a case that it is taking me awhile to adapt to the new lenses.

Also is an add of +1.25 really something that is necessary, i'm only 36 so feel a bit young to have one.

Any advice would be appreciated.

Freddie

p.s. sorry if this is a bit of a long post


Weirdeyes 24 Oct 2017, 23:10

Can someone help read my prescription? What do they mean about plastic and hardened lenses only?

http://imgur.com/4a4MhHA


antonio 18 Oct 2017, 08:07

Natasha,

the woman in yoir second link below saying she neefs them in the gym wears a stronger prescription, more like -3.5 or -4 or even stronger, especially in her right eye.

Best regards, antonio


Cactus Jack 17 Oct 2017, 23:24

Natasha,

Everything beyond 1/2 meter or about 20 inches is increasingly blurry without the glasses. Try on a pair of +2.00 over the counter reading glasses to get an idea.

C.


Natasha 17 Oct 2017, 20:57

Thanks. Any more answers? With more specificity?

How bad is -2?


Cactus Jack 17 Oct 2017, 20:03

Natasha,

Very close to the same prescription. -2 in both pictures.

C.


Natasha 17 Oct 2017, 10:36

I really want to know. Just a guess. Please.


Cactus Jack 17 Oct 2017, 10:03

Natasha,

Why is this so important to you?

Exercises like this are a waste of time and effort. Any guesses are just that. They are not even SWAGs.

I suggest you do a bit of homework and try to learn about the several things that affect the external appearance of a glasses prescription to others.

SWAG = Sophisticated Wild Assed Guess.

C.


Boris 17 Oct 2017, 04:38

Worry not, Natasha, Fearless Leader will solve problem with help from Moose and Squirrel!


Natasha 16 Oct 2017, 22:04

PLEASE TRY. PRETTY PLEASE.


Yugz 06 Oct 2017, 14:25

Natasha

The first ones look stronger, but I can't really estimate.


Cactus Jack 06 Oct 2017, 13:50

Natasha,

There are too many unknown variables to even make a guess at a low minus prescription, which these are, from just looking at some pictures.

C.


kelly 06 Oct 2017, 08:14


Natasha 30 Sep 2017, 09:11

Based on the distortion caused by the lenses, which of these people appears to have a stronger prescription? Can you provide rough estimates of the myopia?

https://imgur.com/a/gWrgc

https://imgur.com/a/CElPz


Cactus Jack 28 Sep 2017, 08:48

Here is the:SIMPLE PRISM TEST

It is not hard to measure the amount of prism it would take for full correction. All it takes is some adding machine or cash register tape, a marking pen, some painters or masking tape (ideally with very weak "stick-um" for easy removal) and something to measure distances.

It is a little easier to work with metric measurements, but you can do it also with inches and feet. You just have to do a little more math for conversions between the two.

This test is based on the definition of 1 prism diopter as: "That amount of prism that will deflect a ray of light 1 cm at a distance of 1 meter (100 cm)".

Ideally, this test is done without any prism correction in your glasses, but you need to be able to see some calibration marks on the adding machine tape with reasonable clarity. If you can't see the marks without glasses, you can still do the test, but you must account for the prism in the glasses.

1. Select a fairly blank wall that you can attach the calibrated adding machine tape to, using the painters or masking tape.

2. Decide where you will stand or sit while doing the test. Between 3 and 4 meters or 10 and 14 feet works best. Measure the distance from that location to the wall selected in Step 1.

3. Calculate how much displacement 1 prism diopter represents at the distance measured in Step 2.

4. Using the marker, mark the adding machine tape with major divisions 5x the distance calculated in Step 3 and optional minor tick marks at 1 prism diopter intervals. The marks need to be big enough to see easily from the distance in Step 2. You might want to identify the major divisions as 0, 5, 10 etc. Note: Some large bold markers will bleed through the adding machine tape and permanently mark the surface you are using as temporary backing for the adding machine tape. Test and take appropriate precautions to prevent damage by the marker ink.

5. Attach the adding machine tape, stretched out horizontally, to the wall selected in Step 1.

6. On another short piece of adding machine tape mark an arrow lengthwise and attach that piece of tape to the wall, vertically, so the arrow is pointing at 0.

You are ready to do the test.

7 Place yourself at the location selected in Step 2, let your eyes relax so you see double and note where the "0" arrow appears to point in the displaced image. Try this test several times during the day and at varying degrees of fatigue. Make a note of your results.

8. If you are wearing glasses with prism, adjust the readings in Step 7 for the total prism in the glasses.

This test will work with horizontal prism (Base Out or Base In) or vertical prism (Base Up or Base Down) by the placement of the long tape and short tape. Often both horizontal and vertical prism exist at the same time.

Note: It is sometimes difficult, if small amounts of prism are involved, to tell if the prism correction needs to be Base Out or In, Up or Down. You may be able to tell by noticing which way the images are displaced when you block the eyes alternately. For example, if you cover the right eye and the image from the left eye is on the left, you probably need more Base Out.

Please Let me know if you have any questions and if this works for you.

C.


Danbert 28 Sep 2017, 08:00

Cactus Jack,

Just reading a little of the last few posts.

I have long thought I might have some esophoria. Or at least, when I am tired, I can find it slow to fuse what I am seeing in the distance. It's as if I can change focus from close to far away relatively quickly, but it can take effort to not see double in the distance. Then if I focus up close again, everything is easy.

I may have tried your test a long time ago but I can't remember too well now. I for one wouldn't mind trying again anyhow.


Cactus Jack 21 Sep 2017, 19:43

Sorry, the last post was to liza.

C.


Cactus Jack 21 Sep 2017, 19:42

lisa,

Mild double vision is pretty common. The general medical term for double vision is Strabismus. At that means is that your eyes do not point in the same direction. There are four compound names for the Horizontal displacement depending on the direction and possibility of fusion : Eso and Exo are the first parts of the names. Eso means that the eyes try to converge or turn inward. Exo means that the eyes try to diverge or turn outward. If you can fuse the images, phoria is tacked on to the first part. If you can't, tropia is tacked on. For example: Esophoria means that your eyes try to turn inward, but you can fuse the images. If your Eye Position Control System (EPCS) can fuse the images pretty easily, most ECPs are reluctant to consider prescribing prism. If it is difficult or impossible for your EPCS to fuse the two images or you can keep the images fused only for as long as you concentrate, Prism in your glasses, Vision Therapy, or Muscle Surgery may be the only solutions.

A while back,I came up with what I call a Simple Prism Test that is based on Sir Isaac Newton's definition of a Prism Diopter. It is on the Vision and Spec web site, but it is hard to find. Would you be interested in measuring the amount of your double vision? I will post it here if you want to try it.

I have a few more questions:

1. What is your occupation?

2. Do you do a lot of close work

3. Can you tell if your eye are trying to turn inward or turn outward?

C.


liza 21 Sep 2017, 14:03

Cactus Jack

it's horizontal.

Soundmanpt

It was an annual exam. And i'll order new glasses, mostly because i want new frame.


Soundmanpt 21 Sep 2017, 09:16

liza

I am curious, did you go for an eye exam because you noticed a change in your vision or was it just an annual exam? I ask that because the from your previous prescription to your current one is so slight. I think most people wouldn't even bother getting their glasses changed with so little change. A -.25 is the lowest possible change you can have. But like Cactus Jack said astigmatisms do effect your vision at all distances. Did you get new glasses? Even with such a small amount of CYL it still can take a little getting adjusted to.


Cactus Jack 21 Sep 2017, 09:03

liza,

There little if any relationship between a small amount of astigmatism and double vision. Larger amounts of astigmatism can cause what appears to be a small amount of double vision, but it does not go away.

When you see two images, can you tell the direction of the displacement? For example: Horizontal, Vertical, or a combination of both (Oblique).

C.


liza 21 Sep 2017, 05:31

Cactus Jack thank you for answering. Is it possible that -0,25 cyl is reason for double vision? Because i notice that i got double vision on daily basis (for a few seconds), but i could stop it consciously.


Cactus Jack 20 Sep 2017, 19:20

aviator-oo-,

You might see if you can find an eyeglass repair shop. Their primary business is repairing frames that have been broken. They might be able to drill out the fastener and install an optical screw of some type.

C.


aviator-oo- 20 Sep 2017, 17:03

I have a question which doesn't quite fit with any of the themes, but I hope someone will be able to offer advice. When it comes to fitting RX lenses to frames which you buy as sunglasses, the general rule is that plastic frames must be made from the type of plastic which expands slightly under heat. Metal frames must have a screw on the edge of the frame to release the lens. I have a number of metal frames which I would love to have RX lenses fitted to, but the screw position is welded-up and there is no way of releasing the lens. Recently, I have received some metal framed glasses from Polette.com where the RX lenses are fitted in a welded frame without a screw release. So, is there a way of getting RX lenses into metal frames without a screw? I know it is possible to ‘pop' non-RX lenses out of (and sometimes into) welded metal frames, but RX lenses? Does anyone know how this is done?


Cactus Jack 19 Sep 2017, 09:34

Lisa,

Yes, it frequently happens. -0.25 of Cylinder is very small and nothing to get excited about. Astigmatism affects vision at ALL distances and is particularly noticeable when reading small text.

Astigmatism is typically caused by uneven curvature of the front surface of the Cornea. Astigmatism typically changes very slowly, but unfortunately, it can appear to change significantly from one exam to another.

Often, the appearance of a significant change in the Axis of the Cylinder correction, while alarming, is caused by the lack of experience and understanding of the nature of that part of an eye exam.

The most subjective part of an eye exam is that of determining the Axis of the Cylinder correction. The way that is done is by using a supplemental Cylinder lens mounted with a pivot at 45 degrees. The lens is flipped back and forth on each side of the selected Axis and you are asked to judge relative blurriness of the letters you see. It is very difficult to do even if you have had many eye exams.

A while back, I wrote a piece "How to Study for an Eye Exam". In it, I described a method I use to improve the accuracy of the prescribed Axis. You may be able to find it online either here or on the Vision and Spex site. I am currently revising it and hope to post it again in the next few days.

C.


Tom 19 Sep 2017, 06:47

Liza, my partner had the same "surprise" at her last exam, when her spheric correction did not change but she got a small cylinder prescribed for both eyes.

However, after getting her new glasses, for which I accompanied her on a Saturday morning, she exclaimed when still at the optician how the new cylinder/astigmatism correction made a huge positive difference for her. She is only -1.5 spheric, but now she wears her glasses more often than before, especially in the evenings, even at home and not only for driving.

Hope you enjoy the same beneficial change!


liza 19 Sep 2017, 02:57

i got new rx and includes low astigmatism, even if i never had it before. is it normal? im 32 yo .

The previous rx was:

R: -4

L: - 4

New rx is:

R: -4, -0.25, 170

L: -4.25


Weirdeyes 19 Sep 2017, 00:12

I was just thinking about what prescriptions people consider strong. When I first got glasses I was Plano in my right eye and +1.25 in my left eye. I considered it a mild prescription. My mom considered it very mild. In my head anything below 1.00 was very mild, but anything above 1.00 was just mild. I couldn't understand why my eye doctor made such a big deal of it. When my prescription increased to +1.75 in my left eye I still didn't think it was a big deal. Eventually I realized that prescription was too weak for me. I even tried wearing my +1.75 glasses on top of my +1.25 glasses. I enjoyed the vision it gave me. I conveniently didn't do the math and just considered it +2.00 or something. I didn't consider +2.00 strong. I was shocked when my next prescription was a bit over +3.00. I considered +3.00 a strong and thick prescription. When my next prescription was over +4.00 I didn't have the same shock. But my dad did. It seems like his cutoff was 4.00, while mine is 3.00.


Mr Jules 18 Aug 2017, 16:46

Presbyopia is advancing again. For several years, I thought my eyesight had stablised at +1.50 distance, with an addition of +1.75. But over the last 12 months, I've had two eyesight tests and as I could tell my reading vision was getting worse again.

Now my prescription is +2.00 for distance and an addition of +2.25. I didn't think my distance vision had got worse, too. It was only the last eyetest that I finally realised I was going to need new lenses. I've been wearing progressive lenses for some years.

Well, I've got my glasses reglazed with the new prescription. And what a difference the new lenses make. But I notice that I have to move my head more and learn to target my eyes through the centre of distance portion of lense to reduce peripheral distortion.

But the middle and close up vision is where there's most new benefit. But with these stronger lenses comes depedency. Without glasses, my distance vision hard to tolerate. And my close up vision is now horribly blurry!

I also have a separate pair of prescription single vision reading glasses at +4.25 which I prefer for extended periods of reading. It's taken about a week to get used to them.

I started wearing +1.00 reading glasses when I turned 40, for occasional use. I am completely fine with being dependent on glasses now. They are an intergral part of my appearance. They only thing I miss is not being able recognise someone in the distance, without my glasses. Worsening close-up vision is one thing, but worsening distance vision is harder to deal with (I think).


Soundmanpt 07 Jul 2017, 08:17

SoCal

It would seem that if your eyesight doesn't seem to be quite as good as it was 8 months ago when you first started wearing -3.00 correction after having wore -3.50 that there has been some change in your eyes. I think since your still nursing it would be best if you can manage to hold off getting your eyes examined until you're finished with that. Having children for many women often does change your eyesight. I have mentioned in here about someone I know quite well that became pregnant. She had perfect eyesight, but with each passing month of her pregnancy her eyesight was getting worse. When she was about 7 months along she wasn't able to drive at night because she couldn't see well enough. I went to see her where she was working and I had several pairs of women's glasses in various prescriptions that I use for the vision group I work with. The strongest pair i had was only -1.50 I believe. All the weaker ones wasn't much help to her. But the -1.50 glasses seemed pretty close to what she needed. I gave them to her because i knew I could replace them. I didn't see her again until a few months after she had her baby. She was wearing a very nice looking pair of glasses that looked really good on her. Of course being a proud momma she wanted to show off her baby boy. She quickly offered to return the glasses I gave her and thanked me again for letting her borrow them. I told I didn't need them back. I complemented her on how nice her new glasses looked on her. She said she thought that once she had the baby her eyesight would return to normal which didn't happen. But she said she was okay with wearing glasses.


 06 Jul 2017, 19:01

I don't think your wearing your glasses full time made your vision worse. I mostly did not wear my glasses as a child and my eyes got worse. When I finally wore my glasses full time my vision still got worse for several years and then stopped getting worse. At that point I was -10 plus a lot of astigmatism. It seems that nearsightness (myopia) takes it's course whether we wear glasses or not.


NNVisitor 06 Jul 2017, 10:23

SoCal

While I don't and never have worn soft contact lenses due to my astigmatism level I'm certainly familiar with the experinces of quite a number of soft contact lens wearers. Many wear them from morning to before going to bed every day. For years until in many cases they have a problem and then a trip to the eye care professional where they are told to stop wearing contact lenses for a few weeks, a few months or permanently.

Soft contact lenses can dry up during wear. That is not good for the eyes especially over a long period of time it can take it's toll.

While I wear gas permeable contact lenses I'm very careful not to overwear them day in day out. Each day typically morning and later evening I wear my glasses to give my eyes a break and to avoid eye problems from occurring. I've worn lenses over 30 years and by not overwearing them and allowing my eyes to rest I've avoided contact lense related eye problems and have not damaged my eyes.


SoCal 06 Jul 2017, 08:01

I'm pretty much -3.0 across the board, contacts included, with the exception of the very minor astigmatism. I'd say I've had this rx for about 8 months now and just starting to notice that it wasn't as good as when I got it, and even then it wasn't perfect. I had gone about 2 years previously without an exam and living off hoarded contact lenses, haha. Prior to the -3.0, I was a -3.5, again, not very much difference, but I did notice that there was one. Between the two different rx, I had two children and that really threw my vision all over the map. I am still nursing and partially weaning my youngest and I am wondering if that is changing things and making my eyes stabilize to my previous pre children rx. Like I said, this pretty negligible but I was curious. I have been wearing my glasses more recently for sure and I'm kind of liking it. My eyes feel like they can breathe. I am partial to the Moscot frames currently have and was looking into getting sunglasses to combat this California sun but decided against it. I decided to order a different brand of contacts that my dr prescribed (he gave me two options) to me and continue wearing my regular sunglasses.


Soundmanpt 06 Jul 2017, 07:16

SoCal

So I assume when you say that you feel like you may have been under prescribed coming from -3.50 in both eyes to -3.00 both eyes you're referring to your contact lens prescription in both cases? That is very strange to happen. But if your eyesight has improved a bit it is going to take a little time for your eyes to adjust because they are used to the stronger prescription. So I would suggest giving it a try for maybe 2-3 weeks and if you still feel like you still need your lenses to be stronger go back and tell your optometrists that you would be happier with the stronger lenses. They are their to please you and shouldn't have any problem putting you back in -3.50's again if your more comfortable with them. Sounds like your eyes are starting to rebel against your contacts if you're having trouble wearing them for 14 hours or more like you used to do. But if you're really wanting to start wearing your glasses more often to the point where your about 50/50 between glasses and contact wear that should help a lot. Maybe try wearing glasses for your everyday life and only wear contacts for special occasions, working out, doing sports and maybe going out for the evening. You have shown several really nice looking pairs of glasses that you bought so you're glasses are trendy enough.


SoCal 04 Jul 2017, 23:37

Thanks everyone! I actually think I was slightly under prescribed having come from a -3.5 in both eyes but I'm okay with it for now. I'm actually enjoying the small amount of cyl correction in my glasses, It definitely is having me in my glasses more than contacts. I'm hoping for a 50/50 split between contacts and glasses because I can tell that I'm having a harder time wearing contacts for 14 hrs or more like I used to.


Soundmanpt 04 Jul 2017, 17:36

SoCal

What your doctor did is very common for them to do and in nearly every case you're going to see better with your glassses having the full complete prescription tan you will with your contacts not having the CYL and adding slightly to your SPH in that eye. You of course have the option if you don't mind the added cost of going to a toric" lens for that eye and including your CYL. But I warn you that "toric" lenses are about 3 - 4 times more expensive than your normal lenses are. So unless it really bothers you I think you're better staying with what the doctor prescribed you.


NNVisitor 04 Jul 2017, 17:17

Cactus Jack, SoCal

Yes -3.25 is just slightly higher so it might do the trick. I think you can also get soft contact lenses for astigmatism so if you ordered contacts on line you can try ordering online at first just for the eye with astigmatism and use that lense with the -3 in the other eye and see how it works.

I've worn RGP lenses for my -10 myopia and astigmatism in the -2 range. My vision has been absolutely great and sharp in those contact lenses but not each time they were fitted. Those lenses have to sit on the eyes a certain way. If they rotate somewhat the astigmatism correction is off and thus vision is not so clear. Also those lenses work together with the tear flow under the lense for the optimum correction. In your case Socal with just a little astigmatism in one eye only you probably don't need the more complicated fittings that I had with multiple visits to get the fit right.


Cactus Jack 04 Jul 2017, 15:20

SoCal,

With a sphere correction around -3.00, Vertex Distance effects are negligible, so there should not be much of a difference in the sphere department. With only -0.50 of Cylinder, it is common to add 1/2 of the Cylinder to the sphere and avoid fitting topic contacts with all their associated costs and problems.

You might consider some -3.25 contacts and see if you like them better.

C.


Cactus Jack 04 Jul 2017, 15:14

Rob,

That is a pretty good increase. What was the interval between the -0.50 and the -1.25. Astigmatism usually changes slowly. Axis is often more critical than the actual Cylinder correction. Listing of the Cylinder without the Axis number is meaningless.

Have you read my post on "How to Study for an Eye Exam". There is a section in there about improving the accuracy of the Cylinder/Axis part of your prescription.

C.


SoCal 04 Jul 2017, 15:05

My current rx is -3.0 and -2.75, -0.5. Could there be a difference in my vision from glasses to contacts. Dr gave me -3.0 contacts for both eyes saying it will cover the minor astigmatism. I feel like my glasses give me better vision but that could just be that glasses give me better vision in general.


Rob 29 Jun 2017, 05:52

I recently had an eye test and found that the cyls have suddenly increased in both eyes from -0.5 to -1.25, the sphere remains much as before at -1.25/1.50 I got new lens fitted but i'm finding them to feel rather strange and hard to get used to. The vision is very sharp though. They feel like they're pulling my eyes. Is this something that I will adapt to over time?

thanks

Rob


NNVisitor 23 Jun 2017, 22:44

Jen

I don't think your wearing your glasses full time made your vision worse. I mostly did not wear my glasses as a child and my eyes got worse. When I finally wore my glasses full time my vision still got worse for several years and then stopped getting worse. At that point I was -10 plus a lot of astigmatism. It seems that nearsightness (myopia) takes it's course whether we wear glasses or not.

One advantage we do have is close reading vision while others absolutely need reading glasses. This usually happens in our forties.


Jen 23 Jun 2017, 15:38

@julia yes it would be ok if are eyes stayed at -1 or -2 so we would only need glasses for distance and not need for reading. But the problem is when we get use to seeing clear with glasses on and then we relie on them all the time until we can't go without. Maybe if I just wore mine when I really needed to my eyes wouldn't of got so bad. I'm with -7.00 and been wearing glasses for 40 years is not a problem. Is better I'm not looking for reading glasses of trying to squint without to read something


Delilah 04 Jun 2017, 14:19

Hi,

My boyfriend wears glasses and contacts and he has a very interesting prescription. He asked me to order him new glasses and this is his prescription. I have never seen a prescription like this. Will someone please explain to me what this all means.

OD: SPH +2.50 CYL-0.50 AXIS 150 ADD1.50

OS: SPH +4.00 CYL-1.25 AXIS 135 PRISM1 6 BASE1 BO ADD1.50

Thanks!!


Julia 03 Jun 2017, 12:13

Is there any problem with being shortsighted? I've never had a problem with it and now I think it's great I don't need reading glasses and I'm 45. But have worn glasses full time for the last 30 years with a -6.00.

The optician says it's better if you have low shortsighted then would only need glasses for distance and none for reading?


SC 21 May 2017, 10:23

Just had a regular test. Age 52 and astigmatism doubles!

Old

OD +1.5 0.5 x80

OS +1.75 0.5x173

Add 2.25

New

+1.75 1.00 x80

+2.00 1.50 x173

Add 2.25

Left eye really +4.50 but brain can't handle it so cosmetic lens


Soundmanpt 16 May 2017, 13:36

R

You never have stated what you age is and that is an important factor here. I can only assume that you might be in your early 40's based on what is going on with your eyesight. So based on that assumption you need to understand that your near vision isn't going to get better. It just doesn't work that way. Almost certainly it is going to worsen no matter what glasses you decide to get. Even though your nearsightedness seems to have improved, it really hasn't changed hardly at all because of the addition of astigmatisms you now have. Visually you are only about -.25 better now than you are with your current -1.25 glasses. I don't have to tell you that -.25 is practically nothing. So I doubt that trying to wear your glasses less is going to be any easier for you than it would now by taking your glasses off. For some reason you seem to think that wearing glasses is somehow going to make your eyesight worse. That is not the case. No matter which way you go you need to accept that your eyesight is going to continue to change and not for the better.


R 16 May 2017, 11:54

Basically can't read with glasses on so now need to take them off to read. Can read fine with glasses off unless very small print on a label. I am

Surprised how quickly near vision has got worse, feels like just a few weeks!

Worsening of near vision now more bothersome than blurred distance vision, that's why I am wondering should I just try to wear glasses less. And it's only in last year that I started wearing glasses much more during the day.


NNVisitor 16 May 2017, 09:59

R

Wearing your glasses shouldn't make reading more difficult if you pick one of the three options below.

Are you comfortable taking off your glasses to read? Or do you have to strain your eyes if you read a lot? If you're straining your eyes to read then reading glasses will work for reading if you don't mind switching glasses to read. Progressives and bifocals have a separate area with the add for reading. You would need to adjust to the fact that such glasses require looking through different parts of the lens for distance and another for reading.


R 15 May 2017, 21:04

It seems that the add might push me from wearing glasses a lot to fulltime if reading might be more difficult even though distance if anything is better?

Should I maybe try to reduce glasses use to stop dependence?

Or am at I a point were I have to accept that a combination of factors make full time glasses wear inevitable?


KL 15 May 2017, 14:42

R,

If you were to get bifocals, the reading segment (or single vision glasses for reading) would be SPH +0.5 CYL -0.5 and SPH +0.25 CYL -0.5 (algebraically adding +1.25 to your distance prescription) which will be more comfortable than just removing your -0.75 -0.5 and -1 -0.5 glasses. Your astigmatism is pretty small, but they'll correct that, and you'll have some plus sphere that means less accommodation necessary for you.

Which also means that yes, if you wear bifocals (or single vision reading glasses, for that matter) it will make it harder to read without them because the ciliary muscles responsible for your ability to accommodate will get weaker when they don’t need to work as hard as they have been.


Soundmanpt 15 May 2017, 14:09

R

Bifocals in your case shouldn't make it anymore difficult for you to read without glasses because all they are doing is eliminating the -1.25 distance. So what you would be really seeing is 0.00 through the add segment of your glasses. But you do need to understand that the reason this is happening to you now is because your eyes are beginning to change as for as needing reading help so it probably won't be long no matter what you do before you're going to need reading help.

It doesn't matter what most people would do if this were their first glasses. They aren't your eyes what matters is what you want. It's really very simple if you get single vision glasses then you will have to constantly be removing your glasses to see small print. If you get bifocals you won't need to take your glasses off to see small print.


R 15 May 2017, 13:35

If go with bifocals will it make it more difficult to read without glasses?

If this was first time glasses would most people go for bifocals or single vision?


Soundmanpt 15 May 2017, 09:10

R

Apparently if you have been wearing your -1.25 glasses nearly full time for a good long while without any vision problems close up, but now you are starting to experience difficulty with seeing close up it means your eyes crystalline lenses are starting to harden which is why your eyes aren't as able to ficus close up anymore. You didn't state your age but this generally starts to occur in your early 40's.

As far as what to do about getting glasses is really up to you. Since you seem to be pretty used to wearing your glasses almost full time anyway I think it would be much more handy to go ahead and get the full prescription so you don't have to be constantly removing your glasses to see things close up. By putting the +1.25 in your glasses what that is in effect doing is cancelling out your -1.25 distance prescription. So it would be the same for your eyes as having no prescription for the reading add. Also you are in fact slightly less nearsighted, however, you now have a bit of astigmatisms to deal with that you apparently don't have in your current glasses. So astigmatisms effects your eyesight at all distances. I hope to not confuse you but if you were sya only considering getting contact lenses with just your new distance prescription the contacts would be -1.00 / -1.25. The doctor would take half the value form your astigmatisms and include that in your distance correction. So really only a very slight decrease in your prescription. But having the actual astigmatism correction in your glasses would still provide you with slightly better vision than contacts would.

So after all that what you're left with is to decide if you want to only get single vision glasses for distance with your new prescription not including the +1.25 add and have to remove your glasses for seeing close or get get bifocals / progressives and not be needing to remove your glasses to see close up.


R 15 May 2017, 00:09

I have had a prescription of -1.25 and have been wearing glasses almost full time for a while. Recently up close is a bit blurred. New prescription is -0.75 -0.5, -1 -0.5 with +1.25 both eyes! Option was to get the prescription or just take off glasses for reading? Should I get glasses with the new +1.25?

As my distance need has apparently lessened, which I didn't notice do I need to continue full time glasses or should I try to wear less?


Soundmanpt 14 May 2017, 08:22

Maria Et

To fully answer your question about your boyfriend's eyesight is really a bit complicated. But you are correct in thinking that + glasses are commonly thought of as reading glasses and not needed for seeing distances. However + glasses are also often wore for farsightedness as well which is a bit different than just being reading glasses anymore. In your boyfriends case he also has a very high amount of astigmatisms which is the -3.25 and -4.25 numbers you see on his prescription. That alone would cause him to need his glasses for everything.


Maria Et 14 May 2017, 01:29

Can someone please explain my boyfriend's prescription to me?

left eye is +5.75-3.25x165

right eye is +5.50-4.25x170

His glasses magnify his eyes, I was always thought + was for reading but he wears his glasses or contacts for everything.

I want to understand his eyes more...


MKWL 10 May 2017, 22:09

Thank you guys!

I finally got my new glasses. They look thicker, but everything looks super clear with them. Also, the reading ones really help.


GreginColo 26 Apr 2017, 18:30

MKWL; it looks like you have already gotten a o]possible interpretation of your new Rx by someone more informed about such than myself. It does sound like a fairly complex Rx. However, you also asked about your + Rx, which could be part of the normal aging process, for most people beginning in their early to mid 40's, were they/we loosse some ability for close up focus, hence the need for reading glasses, which I think is basically what the weaker of your new Rx's is intended to accomplish. You didn't mention your age to help confirm that. Also has you distance Rx stabilized or has it continued to increase from your prior?. You ECP should be willing and able to answer your questions, but if not there are many helpful and well-intended people who contribute to this site. Best of luck adjusting to your new RX. Do you always wear glasses, or sometimes contacts?


 26 Apr 2017, 15:07

MKWL, I could be wrong but I think you have left something out, because what you have written doesn't make any sense. However I am guessing that what you left out might be the reading for the right eye distance. I have taken a wild guess and I think this might be your full prescription:

OD: -16.75 x -3.75 x 120 with 12 D base out prism distance

: -15.50 x -3.75 x 120 with 14 D base out prism mid range

OS: -14.50 x -3.25 x 135 with 12 D Base out prism distance

: -13.25 x -3.25 x 135 with 14 D base out prism mid range

with a +1.25D ADD.

If I am reasonably close, you do have a strong prescription. You require R-16.75D spherical and L-15.50D sph. with another R-3.75D at 120 degrees and L-3.25D at 135 degrees of cylinder for your distance correction. You also require 12 degrees of base out prism for each eye.

For your mid range vision your distance correction is reduced by -1.25D Your astigatism stays the same, however your prism is increased by 2 degrees base out.

The additional prism in your mid range vision is required to bring your eyes to focus up close. No further increase is needed for your reading so it is indicated by a +1.25D ADD.

If you did not require cylindrical or prism correction your prescription would likely have been written as:

OD - 16.75, OS - 14.50 with + 2.50 add multifocal


Maxim 26 Apr 2017, 14:17

I totally agree with Tom.

The correction needed is very low indeed, and you could give a try to the simple lenses without astigmatism.

Best wishes!


Tom 26 Apr 2017, 14:01

I'm not that expert but your astigmatism sounds low esp in the right eye, which can easily survive without cylinder.

I'm sure you'd be ok with -1.5 and -1 sphere, no astigmatism at all.

Let see what others think.


Squidink 26 Apr 2017, 13:17

I had recent eye test, astigmatism went up. I'm debating trying contact lenses for occasional use but heard that toric contacts are not very comfortable and are more expensive. Is the optometrist likely to give me toric contacts with this prescription

Left eye sphere -1.00 cyl -0.75 axis 10 Right eye sphere -1.00 cyl -0.25 20


MKWL 25 Apr 2017, 19:13

Well, I had an interesting appointment today. The appointment was a little different today. At the end the doctor opened up both eyes and asked if I saw one or two images, and I saw two. He then did some weird stuff, like kept waving something in front of and away from my eyes, and back and forth between my eyes and held this ruler looking thing to my eye. This was then done by looking at a hand held card. Also, after that the doctor pulled out a smaller chart and had me try to read it with the black glasses thing, and I couldn't read it all. He switched some stuff up, and it became clear and easier to read. When I went to pick out glasses they told me I needed two, One for far, and one for reading. The girl also said something about a prism and presbyopia. I am so confused. When I looked at the paper with my prescription, there were two joined charts there, and one on the bottom of the page instead of the usual one. The the top part of the joined chart is distance and the bottom half is near. I don't know how to really understand a prescription, so was hoping some one can help me. All I know is I am very nearsighted, and the bigger the number the worse my prescription, and my numbers are pretty high. My prescription is: the distance part has the following numbers in the first row: . The second row in the distance part : -14.5, -3.25, 135, 12, and out. Now for the near part of the chart, the first row: -15.5,-3.75,120,14, and Out. The second row of the near part: -13.25,-3.25,135,14 and out. The other chart on the bottom of the page is longer, with more columns, but only has two rows. It reads mostly the same, but the extra columns, which I think just blends the other charts into one, but has this +1.25 in both rows under the ADD column. Why is there a + I thought I was nearsighted? What is the plus doing, and why isn't there a plus in the other merged chart?

Sorry for being so long, just really confused. Hope someone can help.


Cactus Jack 06 Apr 2017, 11:05

RL,

You only need to click one time on the Submit button. If it turns blue with white text, your post has been placed in the queue and it will be transmitted to the server in a few seconds. If you click more than once you will cause multiple posts.

C.


RL 06 Apr 2017, 07:36

There was some astigmatism too but it never changed. -1.25 in the right eye and -.75 in the left eye.


RL 06 Apr 2017, 07:35

There was some astigmatism too but it never changed. -1.25 in the right eye and -.75 in the left eye.


RL 06 Apr 2017, 07:17

That was a -1.5 jump to -10.25.


RL 06 Apr 2017, 06:38

On average it went up about -.75 a year. Biggest jump was -1.25 from -8.75 to -10.25. I was about 30 years old then. Next year it was at -1l, actually -11.25 where it finally stopped.


RL 06 Apr 2017, 06:37

On average it went up about -.75 a year. Biggest jump was -1.25 from -8.75 to -10.25. I was about 30 years old then. Next year it was at -1l, actually -11.25 where it finally stopped.


I, Glasses 05 Apr 2017, 18:09

RL, What was the specific progression of your myopia, in other words, at what ages/intervals (years or months) did you get stronger prescriptions, and what was each stronger prescription? Thanks.


RL 04 Apr 2017, 10:10

Got my first glasses at 19. They were -.75. Over the next 15 years the RX progressed to -11 where it stayed until my late 60s when it backed off a bit to -9.25 where it is today.


RL 04 Apr 2017, 10:09

Got my first glasses at 19. They were -.75. Over the next 15 years the RX progressed to -11 where it stayed until my late 60s when it backed off a bit to -9.25 where it is today.


Cactus Jack 03 Apr 2017, 17:31

nemo,

May I ask where she lives? When I read your post, I hoped she lives in or near the UK. The reason is that Moorfields Hospital in London is one of the best Eye Hospitals, in the world.

Many eye and hearing conditions have a genetic cause, because they tend to run in families, but I don't believe that there is one gene that affects both vision and hearing. The human Genome is much more complicated than that.

It is pretty common for people with high myopia to have Visual Acuity problems. Vertex Distance effects of high minus glasses cause the image on the Retina to be small and it is possible that there are some congenital retina issues that make it difficult for the minified images of text to stimulate enough Rods and Cones in the retina to produce a signal that the Visual Cortex can resolve. Remember, vision occurs in the brain, the eye are merely biological cameras.

Glaucoma is notorious for causing retinal damage.

Hopefully, she is under the care of a Low Vision specialist.

One "trick" that might be possible it to wear Contact Lenses to correct most of her sphere error and enlarge the images on her retinas and also wear glasses to correct the rest of sphere and ALL of her astigmatism. She needs to be under the care of an ECP who is willing to be creative.

C.


nemo 03 Apr 2017, 15:33

A have recently had an online talk with a 19yo girl complaining for her eyesight. She is currently wearing a -19 -15 single vision glasses with -4.50 -2.50 astigmatism. Her RX is significantly higher than her previous one she had last september, both for sphere (increas around -3) and cylinder (increase around -2).

Nonetheless:

1) even with her new glasses she cannot focus well far and has feels usafe in streets, cannot see stairs, and so on;

2) since last december she is almost unable to have good close vision: she cannot read prints at all and needs to strongly magnify computer screen to read it;

3) she has high eye pressure;

4) her hearing acuity is slowing down as well: her mother (which is 40yo) is -7 and has recently started to wear hearing aids: it is possible that both have some genetic disease that targets simultaneously on eyes and ears?

She has told me that according to her eye doc her eyeight will worsen and suggested her to go urgently to an eye hospital and test eyes better, so as to find tools to cope with so poor eyesight.

Sadly, I suspect she has glaucoma or keratoconus (or both).

is that possible? Could her close vision problems depend on the higher minus RX, so that she can overcome them with a pair of bifocals? Is she doomed to become blind or has a residual hope to recover sight or at least keep her remaining acuity?

Please give me any suggestion to not scare her and to be of help during our talks. Thank you


Cactus Jack 01 Apr 2017, 14:45

Lucas,

Plus lenses for reading are Magnifying lenses. If you need PLUS Sphere lenses for distance, you do not have enough PLUS in your eye's lens system to focus distant images clearly on your Retinas. Effectively, your eyes actually MINIFY the images on the Retina, but you are used to that situation. The +0.75 Add in your prescription to help you focus for reading will actually magnify the images of the text slightly, but the main thing they will do is reduce the amount of extra PLUS your Crystalline Lenses will have to supply for you to focus at normal reading distances.

I suggested the +1.00 clip-ons because RxSafety Glasses do not offer powers less than +1.00.

You might consider ordering glasse from Zenni Optical. They are high quality and cost a lot less than High Street Opticians.

C.


Lucas 01 Apr 2017, 11:02

Went into a store today and realized very quickly that lenses with an add for near vision cost a fortune. So far, I dont have any symptoms really requiring me to use my glasses. My exam was really more of a check-up than anything else.

Would I really benefit from such a prescription? I tried +1.25 reading glasses in stores and they felt extremely strong, almost like using a magnifying glass. Instead of correcting my vision, it felt more like I was just using a magnifying glass and that the text was unnaturally big.

Thanks


Cactus Jack 31 Mar 2017, 19:55

Lucas,

+1.25 -0.50 165

+1.00 -0.25 005

could be prescribed as a single vision reading or computer prescription, but distant things would probably be a bit blurry. Bifocals with a low add are often prescribed to reduce headaches and fatigue when reading or doing close work and still provide good distance vision thru the top segment.

C.


Lucas 31 Mar 2017, 19:24

Cactus jack,

Thanks for the answer. Would that mean that my actual reading prescription is 1.25 and 1? Why not prescribe that directly?


Cactus Jack 31 Mar 2017, 19:19

Lucas,

The add only affects the absolute power of the Sphere connection in the reading segment. The prescription there is:

+1.25 -0.50 165

+1.00 -0.25 005

I would like to suggest an alternative. RxSafety.com in New Jersey offers some Clip-on Magnifiers starting at +1.00 and working up to +5.00. They offer two sizes. I suggest that you consider the small size +1.00 and wear them over your 4 year old glasses when using the computer. I think you will find them comfortable and you don't have to tilt your head back and get a crick in your neck. They are very high quality and are about US$15.00 a pair.

They have a 20% off sale right now with the code THAW17.

You may be tempted to try something stronger, but try the +1.00 first. You don't want to let your Ciliary Muscles get de conditioned.

C.


Lucas 31 Mar 2017, 18:20

Hi,

I got the following new prescription for glasses :

+0.50 -0.50 165 ADD +0.75

+0.25 -0.25 005 ADD +0.75

The dr suggested I get anti fatigue glasses.

I am 25 years old working on the computer all day.

Now this prescription is identical to a previous one from 4 years before, with the ADD on top. The doctor mentioned that my previous prescription wasnt strong enough and suggested I wear these constantly when working.

From my research online, anti-fatigue glasses are only +0.6 near add. Why did she specify +0.75?

Also, would that make my near vision +1.25 or just top part 0.5 and bottom part of the glasses 0.5?

Should my prescription for close be really 1.25? If thats the case, why not prescribe that, is it for me to get accustomed to them and my distance vision to the 0.5 on top?

Thank you for the help


Lucas 31 Mar 2017, 18:20

Hi,

I got the following new prescription for glasses :

+0.50 -0.50 165 ADD +0.75

+0.25 -0.25 005 ADD +0.75

The dr suggested I get anti fatigue glasses.

I am 25 years old working on the computer all day.

Now this prescription is identical to a previous one from 4 years before, with the ADD on top. The doctor mentioned that my previous prescription wasnt strong enough and suggested I wear these constantly when working.

From my research online, anti-fatigue glasses are only +0.6 near add. Why did she specify +0.75?

Also, would that make my near vision +1.25 or just top part 0.5 and bottom part of the glasses 0.5?

Should my prescription for close be really 1.25? If thats the case, why not prescribe that, is it for me to get accustomed to them and my distance vision to the 0.5 on top?

Thank you for the help


Lucas 31 Mar 2017, 18:19

Hi,

I got the following new prescription for glasses :

+0.50 -0.50 165 ADD +0.75

+0.25 -0.25 005 ADD +0.75

The dr suggested I get anti fatigue glasses.

I am 25 years old working on the computer all day.

Now this prescription is identical to a previous one from 4 years before, with the ADD on top. The doctor mentioned that my previous prescription wasnt strong enough and suggested I wear these constantly when working.

From my research online, anti-fatigue glasses are only +0.6 near add. Why did she specify +0.75?

Also, would that make my near vision +1.25 or just top part 0.5 and bottom part of the glasses 0.5?

Should my prescription for close be really 1.25? If thats the case, why not prescribe that, is it for me to get accustomed to them and my distance vision to the 0.5 on top?

Thank you for the help


George1968 24 Mar 2017, 17:16

Dahlia,

You have to make the choice as to how often you wear your glasses. It's a combination of physical and psychological comfort.

Some people are really bothered by the vision they have when their prescriptions are -2.50 and higher, and so wear their glasses for because it is physically more comfortable for them. Others can deal with the less than perfect vision, or are so distressed about wearing glasses, that it is not worth it for them to do so.

That's all up to you. If you feel the glasses are too thick, you can either change the glasses or not wear them unless you absolutely have to.

Or, maybe after a couple of days, you'll figure that, on balance, it is better to wear them than not.


George1968 24 Mar 2017, 17:11

Dahlia,

How often are you wearing your glasses? Do they make a difference?

You might notice some change in thickness, but I think it is more of a thing that you are -- or you are considering -- wearing your glasses full time and are worried about what people will think.


Soundmanpt 24 Mar 2017, 09:10

Dahlia

I can't understand why your lenses would be as thick as you say they are. Even the optical stores don't start suggesting high index lenses until a prescription gets a bit stronger than -2.50. Now of course if you wear rimless or semi-rimess glasses there is no frame to cover any thickness. Of course your lenses would be slightly thicker going from -1.50 to -2.50 and -1.25 to -2.25. Enough that you would be able to see the difference but not to the point where they should look too thick or strong. Most places that you buy glasses form have a return policy for up to 90 days which allows you to change your glasses or modify them without any charge. So you have several options. One is go back and pay the extra to have high index lenses put in. The other is to get a full plastic frame which should cover or hide any thickness from being seen. In either case you would only be charged the difference. Switching to thinner lenses should be under $50.00 and switching frames might be a refund to you depending on the prices of the frames.


Dahlia 24 Mar 2017, 03:23

They are really quite thick.


bracesfan 23 Mar 2017, 23:50

Dahlia:

Cokebottles at -2,5 diopters? Sorry but you are exaggerating. Even in 1,49 and with big frames it´s only a couple of milimeters. You should see what cokebottles are and how they change the face.


Likelenses 22 Mar 2017, 23:51

Dahlia

There is nothing hotter that a twenty year old girl with thick lenses.


Rebecca 22 Mar 2017, 00:20

I don't know what my current real prescription is. I really hope it has increased this time. I'll have another eye exam in April. Currently I wear -3.75 glasses and I've gotten used to them, so I will get a stronger prescription next time I buy from Clearly.


NNVisitor 22 Mar 2017, 00:06

Dahlia

You do not have a very strong prescription however very large frames will result in thicker glasses. My Glasses were much much stronger and yes my glasses were very thick until I started purchasing high index thinner eyeglass lenses in smaller frames. We are our own worst critics when it comes to how we think our glasses look to others. I've found out after many years that to other people the appearance of my glasses were no big deal. Everyone has their own problems that they focus on so don't worry about your appearance with your glasses on. To others they will look absolutely great on you.


Dahlia 21 Mar 2017, 21:09

Glasses arrived earlier today. They're absolute cokebottles unfortunately. I asked the guy why the lenses were so thick. He said it's because I chose an "oversized" frame with 1.49 index lenses. Not sure what that means but I am not happy!


Likelenses 21 Mar 2017, 19:57

Dahlia

Yes, you should be a full time wearer.If not now with in the next two years you will probably be peering through -4.00,and unable to function without correction.

Bottomline is SOONER, OR LATER.


George1968 21 Mar 2017, 12:39

Dahlia,

Do you have an issue wearing glasses fulltime?

Look, no one will make you wear your glasses. It's a matter of physical and psychological comfort.

So, when you get them, wear them for a couple of hours and then take them off. Do you feel you are comfortable with the vision without glasses?

If not, you probably have your answer.


Soundmanpt 21 Mar 2017, 09:21

Dahlia

I am curious as to tow much you wore your previous glasses that were -1.50 / -1.25? In my opinion you were just under what I would consider the borderline of needing your glasses full time. There is no glasses police so when and how much you choose to wear your new glasses is strictly up to you with of the exception of driving where you certainly need your glasses for. Since you're in your early 20s your eyes are still in that time frame where it is very common for your eyes to have some change every year. But it shouldn't be too long before your eyes become stable. So in the 2 years since you last had your eyes checked they have changed by a diopter in each eye. So it is safe to say had you gotten your eyes checked after one year the change would have only been about -.50 making your glasses -2.00/ -1.75 a year ago. So hat amount of change is about what would be expected by now. It si safe to say that after wearing your new glasses for a few weeks and then testing your eyes with your previous -1.50 / -1.25 glasses you will quickly know that they are too weak to even use as a backup or spare pair. So I agree with Cactus Jack that you probably do need to be wearing your new glasses full time now.


Dahlia 21 Mar 2017, 08:45

I'm in my early 20s. It's been a while since my last test. Maybe 2 years.


Cactus Jack 20 Mar 2017, 22:46

Dahlia,

You probably should. Without correction, your visual world is a sphere approximately 40 cm in radius. Beyond that distance, everything is increasingly blurry.

You have moderate Myopia and effectively you are wearing +2.50 reading glasses all the time. It is great for close work or reading, but you probably can't recognize someone you know 6 meters away. Also, your Ciliary Muscles are probably very weak because they don't get much exercise. That will probably cause you some problems when you first start wearing the new prescription. However, that will only last a week or two.

You did not answer the two other questions I asked. Your answers will help me offer better suggestions that more closely meet your needs.

C.


Dahlia 20 Mar 2017, 20:48

Yes, that is it. Do I need to wear glasses all the time?


cactus Jack 20 Mar 2017, 20:16

Dahlia,

Were those your complete prescriptions?

Not really a huge increase, but it depends to some extent on your age and the time interval between the Old and New prescriptions.

C.


Dahlia 20 Mar 2017, 19:25

New prescription:

-2.50

-2.25

Old prescription:

-1.50

-1.25

Is it a lot worse?


Cactus Jack 19 Mar 2017, 17:30

Question,

Here is an expanded version of your daughter's prescription:

OD (Right Eye) Sphere +0.25 Cylinder -2.00, Axis 096 degrees

OS (Left Eye) Sphere +0.50, Cylinder -1.75, Axis 068 degrees

The PLUS Sphere number means that she is a tiny bit far or long sighted (Hyperopia). By itself, it would be almost insignificant. Almost all children are born with Hyperopia because their eyeballs are small to fit in their small heads. Fortunately, children also usually have abundant Accommodation Amplitude and can easily compensate for their Hyperopia. As a child grows and their eyeballs grow, they will become less and less Hyperopic. Eyeball growth is primarily controlled by their genes, but the visual environment can also be a factor in how vision develops. It is likely that your daughter's sphere correction will decrease and perhaps, she may become a bit nearsighted (Myopic) by the time she is in her early 20s.

The thing that is significant and the dominant factor in your daughter's prescription is the Cylinder correction for Astigmatism. Astigmatism affects vision at all distances and it makes text very hard to read, comfortably. The problem is that it requires external correction.

Astigmatism is typically caused by uneven curvature of the front surface of the Cornea. It is steeper in one direction than it is in the other. We think of a cylinder and being something shaped like a "can" in the pantry. Ideally, the Cornea is shaped like a slice from the side of a glass ball. If a person has Astigmatism, the Cornea is shaped like a slice from the side of a glass American Football. Often people with Astigmatism will see a "ghost" image of the words when the read.

The Axis is the Long Axis of the Cylinder. Cylinder and Axis are ALWAYS listed together. The actual Axis angle does not have any particular effect on a persons vision, but when a Cylinder correction is specified, the Axis needs to be very close to the actual Axis of the person's Astigmatism.

Just as an FYI, by convention, 0 (or 180) degrees is horizontal and the numbers increase in a counter-clockwise direction, looking at the patient. 90 degrees is vertical and on around to 180 degrees. Axis is always specified as between 0 and 180 degrees. Some Eye Care Professionals (ECPs) like to use 0 to 179 or 1 to 180.

We don't know the actual cause of Astigmatism, but it seems to be related to uneven growth of the eyeball putting stress on the eyeball. Incidentally, even with your daughter's astigmatism, the difference in curvature is very tiny. At some point in the future, when she has stopped growing, it may be possible to correct her Astigmatism with minor Refractive Surgery, if it is a problem.

When she gets her glasses, things may look a little distorted initially, but that will go away in a few days. Vision actually occurs in the brain, the eyes are merely biological cameras. Her brain is used to dealing with distorted images and it has to get used to working with corrected images. I suspect she will find it much easier and more comfortable to read.

I hope this helps. Feel free to ask more questions is you wish.

C.


Question 19 Mar 2017, 09:16

My 11yr old daughter was just prescribed glasses for the first time after a school eye test detected a problem and alerted my wife and I. Her prescription is OD +0.25 -2.00 096 OS +0.50 -1.75 068. Can someone explain these numbers and let us know what to expect in the coming years? My wife only wears readers and I'm close to that point, but neither of us ever wore glasses otherwise, thanks.


Soundmanpt 19 Mar 2017, 09:06

Beth

I have been following your correspondence with "Cactus Jack" and the advice he provides you can take to the bank. He mentioned that if you do decide to get glasses that you might want to order them on line. If so you will find that there are a number of places that offer glasses on line. But the one I and many others in this site prefer is "zennioptical.com" but "eyebuydirect,com" is also quite good. They both offer several hundred choices for under $13.00 and that is for a complete pair of glasses in your prescription. For an additional $5.00 you can get an optional AR coating (anti-reflective) which I highly recommend. It is of course up to you if you get glasses or don't get them but because of your job as a nurse you know how important having good eyesight is when reading medicine bottles and so much other small print. Going without glasses your eyesight is at least slightly impaired for both distance as well as up close. You are very slightly nearsighted but wearing glasses when driving would make seeing signs somewhat clearer and driving at night your glasses would be even more useful to you. It would be up to you how much you choose to wear your glasses but I think that you would find wearing your glasses enough of a benefit while at work as well as for driving. They would be helpful at the movies, concerts and viewing sporting events. I will warn you that if you get glasses when you first put them on because of your astigmatism things may seem a bit off like the floor may appear to be at an angle and you may feel slightly dizzy or even get a small headache but that will rather quickly go away as your eyes adjust to your glasses.


cactus Jack 18 Mar 2017, 15:44

Beth,

Astigmatism affects Visual Acuity at all distances, there is really nothing you can do about it except wear external corrective lenses. It is particularly noticeable when reading very small text.

Vision actually occurs in the brain. The eyes are merely biological cameras. The brain has amazing image processing powers and can correct images if it knows what something is supposed to look like. The brain can also create images with your eyes closed such as when you dream or have hallucinations.

If you decide to get some glasses, you should wear them full time for about 2 weeks and then make a decision about when to wear them. Initially, you may think that glasses have made your vision worse, but that is not correct. It usually takes about two weeks (maybe less for your low prescription( for your brain to get used to the images being corrected optically and stop expending the image processing effort.

If you get an opportunity, it might be helpful to read "How to Study for an Eye Exam"

C.


Beth 18 Mar 2017, 14:20

Thank you for the explanation re the cylinder that makes sense . I am 31 years old, UK based and work as a psychiatric nurse. I am confused I thought with short sightedness it's difficulty for distance not up close like reading tasks. Sorry for my ignorance in this area!


Cactus Jack 18 Mar 2017, 14:14

Beth,

Prescriptions written in +cylinder format are harder to understand than the more common - cylinder format. Typically, MDs use +cylinder and ODs, Opticians, and Lens Makers use -cylinder format. There is an easy formula for converting from one format to the other. The prescription you were given:

OS (Left Eye) sphere -1.00 cylinder +0.75 axis 90

OD (Right) sphere-0.50 only

is converted by algebraically adding the cylinder to the sphere, changing the sign and either adding or subtracting 90 degrees to the axis to be between 0 degrees or 179 degrees. The conversion results in this prescription.

OS (Left Eye) sphere -0.25 cylinder -0.75 axis 0 (long axis horizontal)

OD (Right) sphere-0.50 only

You are very mildly short sighted. Because of the astigmatism in your left eye, I believe you will find that wearing glasses would help your eyes work together better and make it easier to read small text with less fatigue.

If you have not ordered glasses, you might consider ordering some inexpensive glasses, online.

May I ask:

Your age?

Your occupation?

Where you live?

C.


Beth 18 Mar 2017, 13:38

Hello I got given this prescription and wanted your thoughts on whether it's worth getting it made into glasses,I remember it making a difference on the eyechart but will it be enough of a difference in the real world. Also what does it mean to have a minus sphere but a plus cylinder? Am I long and short sighted in that eye?

Left sphere -1.00 cylinder +0.75 axis 90

Right sphere-0.50 only


Beth 18 Mar 2017, 13:37

Hello I got given this prescription and wanted your thoughts on whether it's worth getting it made into glasses,I remember it making a difference on the eyechart but will it be enough of a difference in the real world. Also what does it mean to have a minus sphere but a plus cylinder? Am I long and short sighted in that eye?

Left sphere -1.00 cylinder +0.75 axis 90

Right sphere-0.50 only


Frank 28 Feb 2017, 03:29

Sorry, I meant to write Roy in my previous post.


Frank 28 Feb 2017, 03:28

Rob,

Thank for the detailed overview. Luckily I am not dealing with any vertical deviation, but my progression of horizontal deviation follows a similar pattern as yours. I understand that you mostly corrected for comfort, not full correction, so I guess I need to be mindful of that when ordering my next correction. But as far as I can understand you still seem to be able to fuse the images if you want, which is good.

Thank you again!


HighMyopic 25 Feb 2017, 11:14

Roy whats your email? I would love to see pics of your 24 prism glasses. I collect very strong glasses. My email is jetcoasterfan@gmail.com


Roy 25 Feb 2017, 10:54

Frank,

I first experienced double-vision around the age of 15 when I noticed a vertical split image when looking to the left or right extremes of my visual field. I was prescribed a 2 up/3 down prism. This fixed the problem and has remained part of my prescription ever since.

My need for the horizontal prism came much later - in my mid/late forties I think. I noticed eye strain which the optician was able to relieve with base-out prisms. I believe my first prescription was around 4 BO (shared). It crept up over a few years to around 8 shared and was fairly stable at this until around my mid fifties. (I am 70 now.) Over the last 14 years or so it increased steadily to the current value of 24 shared. The pattern is usually the same when I need an increase. I notice the eyes strain more as they maintain fusion. A small increase, usually 2 dioptres relieves the strain and relaxes my eyes.


Frank 24 Feb 2017, 00:51

Roy,

your prescription sounds indeed very high. Can you recall at which prescription your double vision became more permanent?

When doing CJ's test (see my results in the post before yours) I noticed a considerable jump and stronger variation of my correction needs. How was your experience over time?

Thanks,

Frank


Cactus Jack 22 Feb 2017, 07:26

Roy,

That seems reasonable. Many ECPs prescribe less than full prism correction for good reason. If at all possible, they want to leave some convergence ability for close work.

Even with prism correction, it is fairly common to see double when looking extremely left or extremely right. What happens is that as your eyes look that far left or right, one eye will "hit the stop" before the other and it will be physically impossible for the eyes to track together.

From an engineering point of view, the Eye Position Control System (EPCS) (my name) seems to be what is called an Open Loop Servo system that only needs some prism help to get the two images into "fusion range". Based on my experience, the EPCS seems to use sharp vertical lines or edges in the images to "lock on to". The thing that seems to cause confusion for my EPCS is images with repeating patterns or elements such as wallpaper or a row of light bulbs in the fixture over my bathroom mirror. If I am not paying attention, I will break fusion and I have to look at something else to re-fuse the images.

The exception to prescribing less than full correction is those situations where the EPCS has limited control over eye position, such as traumatic brain injury. In those instances, it may be necessary to prescribe full prism correction for distance and a different amount of prism for focusing close. Lenses with different amounts of prism for distance and close are called "Slab-Off" lenses.

C.


Roy 22 Feb 2017, 06:38

CJ

I tried your prism test, repeating it several times to get an average, and arrived at a figure of 35 dioptres (base-out correction needed). Does that see reasonable, compared to my prescription of 24 BO (shared), which implies that my eyes can manage the other 11 dioptres?

I don't get any double-vision with the new glasses. With my previous pair, which have a prescription of 22 base-out, I was getting slight double-vision, but only when looking at the extreme right hand side of my field of view.

To me it looks as if I need the full 24 BO. As I said before I am concerned that any further increases may take me beyond the limit for manufacturing the the ground-in prisms. Do you know what the limit is?

Thanks for your help


Frank 22 Feb 2017, 04:34

CJ,

Thank you for pointing me to your test. I had taken it before, and developed an adapted version of it for ad hoc use on my computer at a distance of 1m. I have measures the deviation for the past few days (with wide range of variations, strongly dependent on my fatigue), with rather high values in the morning and evening. I measured average values of 15 diopters. That hit me with surprise. I had estimated a total deviation of 15 BO from past tests, but this is on top of my current 6 BO (my astigmatism prevents me from reading the measure without correction at any distance).

Since starting to wear prisms, I have 'learned' to control my eyes in that I can relax them spontaneously, something I hadn't been able to do before. I am wondering if that is normal once getting used to prisms. However, I also noticed that my eye positioning system is very adaptive, and after a few minutes, my eyes drift further apart. So I suspect the current measures are only the status quo, but are likely to increase if I would wear a permanent correction of this strength (21 dptr BO). After relaxing my view for some time, it becomes quite hard to bring my eyes back into fusion. Is that something to be worried about?

Given the aesthetics of such high correction and the ease with which my eyes adapt to it, I would prefer to hold off, and only correct it to a level that allows me to read properly without tunnel or double vision as long as possible, but I am wondering if my planned 10 BO is sufficient for this, or just wasted money...

Thank you for your advice!


Cactus Jack 18 Feb 2017, 17:43

Frank,

See my reply to Roy, below. You can also do the test.

C.


Cactus Jack 18 Feb 2017, 17:41

Roy,

SIMPLE PRISM TEST

It is not hard to measure the amount of prism it would take for full correction. All it takes is some adding machine or cash register tape, a marking pen, some painters or masking tape (ideally with very weak "stick-um" for easy removal) and something to measure distances.

It is a little easier to work with metric measurements, but you can do it also with inches and feet. You just have to do a little more math for conversions between the two. Just remember, 39.37 inches = 1meter or 100 cm.

This test is based on the definition of 1 prism diopter as: "That amount of prism that will deflect a ray of light 1 cm at a distance of 1 meter (100 cm)".

Ideally, this test is done without any prism correction in your glasses, but you need to be able to see some calibration marks on the adding machine tape with reasonable clarity. If you can't see the marks without glasses, you can still do the test, but you must account for the prism in the glasses.

1. Select a fairly blank wall where you can attach a calibrated adding machine tape, using painters or masking tape.

2. Decide where you will stand or sit while doing the test. Between 3 and 4 meters or 10 and 14 feet works best. Measure the distance from that location to the wall selected in Step 1.

3. Calculate how much displacement 1 prism diopter represents at the distance measured in Step 2. The calculation is not hard. Recall, the definition of a prism diopter above. If the distance from where you will stand to the wall is 3 meters, 1 prism diopter will displace the images 3 cm

4. Using the marker, mark the adding machine tape with major divisions 5x the distance calculated in Step 3 and optional minor tick marks at 1 prism diopter intervals. The marks need to be big enough to see easily from the distance in Step 2. You might want to identify the major divisions as 0, 5, 10 etc. Note: Some large bold markers will bleed through the adding machine tape and permanently mark the surface you are using as temporary backing for the adding machine tape. Test and take appropriate precautions to prevent damage by the marker ink.

5. Attach the adding machine tape, stretched out horizontally, to the wall selected in Step 1.

6. On another short piece of adding machine tape mark an arrow lengthwise and attach that piece of tape to the wall, vertically, so the arrow is pointing at 0. You are ready to do the test.

7. Place yourself at the location selected in Step 2, let your eyes relax so you see double and note where the "0" arrow appears to point in the displaced image. Try this test several times during the day and at varying degrees of fatigue. Make a note of your results.

8. If you are wearing glasses with prism, adjust the readings in Step 7 for the total prism in the glasses. For example, if you need to wear glasses to see the marks and the glasses have say at total of 12 diopters Base Out (6 in each eye), what ever displacement you measure needs to be added to or subtracted from the 12 total BO. It is sometimes hard to decide if you need more prism in your glasses or less, but you can probably figure it out.

This test will work with horizontal prism (Base Out or Base In) or vertical prism (Base Up or Base Down) by the placement of the long tape and short tape. Often both horizontal and vertical prism exist at the same time. You just have to change the orientation of the tapes from horizontal to vertical.

Note: It is sometimes difficult, if small amounts of prism are involved, to tell if the prism correction needs to be Base Out or In, Up or Down. You may be able to tell by noticing which way the images are displaced when you block the eyes alternately. For example, if you cover the right eye and the image from the left eye is on the left, you probably need more Base Out.

Please Let me know if you have any questions and if this works for you.

C.


Roy 18 Feb 2017, 07:20

Yes Cactus I would like to try your prism test. How would I need to modify it for my prescription?


Cactus Jack 17 Feb 2017, 16:06

Roy,

Have you done the Simple Prism Test? If you want to do it, we may need to modify the test slightly because of your prescription. Let me know if you are interested.

C.


Roy 17 Feb 2017, 14:46

My 2-year eye test resulted in a reduction of 0.25 in each eye for my myopia and an extra 1 diopter to the base-out prism in each eye. Prescription now reads:-

Right eye -1.50, -1.00 @ 88, prism 3 down & 12 out

Left eye -4.25, -1.00 @ 80, prism 2 up & 12 out

Add 3.00

Got my new (progressive) glasses with this prescription yesterday and am really pleased with them. The slight double vision I had when looking to the left has gone and vision is noticeably sharper. (I just managed 20/20 in the eye test.)

The outer edge thickness of the lenses is now around 12mm and I re-used an old titanium frame with a 2mm thick rim. The edges of the lenses are not polished or chamfered. (I requested this.) I love the look of them. Just a bit worried I might reach the limit of prism that can be ground in if I have any more increases in the horizontal prism. Does anyone know what the limit is for this?


Cactus Jack 16 Feb 2017, 10:05

Frank,

Have you done my Simple Prism Test? You can measure your needs with surprising accuracy.

C.


Frank 16 Feb 2017, 03:13

Hi CJ (et al.),

Thank you for your advice/experience. To figure out which prescription I should order, I have gotten some prism foils from an optical shop (2 BO to add onto my current glasses, and 8BO to use with an older pair that doesn't have prism correction).

I have been wearing those for a few days (at home only, though - vanity is an issue ;)) and got somewhat used to the reduced vision quality of the foils. In fact, they seem to act more like occlusion foils, but the vision comfort outweighs this disadvantage (I notice that once I take them off)

But after those few days, I realise that my eyes tend to drift off again, and I have severe problems keeping my eyes fused in the morning wearing my regular prescription for work (especially when tired). For the purpose of testing, I now tried the 8BO foil on top of my regular glasses (adding up to 14 BO in total), and must admit that the vision was never so relaxed. But I also realise that it is extremely hard to fuse my eyes again for the rest of that day once I remove the foil.

I suspect that my deviation is definitely higher than the prescribed 8BO, and I am now wondering how high my strabismus really is (since my eyes adapt so quickly). I will at least order 10 BO for my daily use, but wonder if it makes sense to go higher immediately?

Any thoughts appreciated!

Frank


Soundmanpt 08 Feb 2017, 14:08

anon

Most likely you only barely passed the drivers vision test when your prescription was -.50/-.75. Now that it has changed slightly to -.75/-1.00 i'm quite sure you would be unable to see 20/40 which is the limit you need to able to see. You likely only passed on the basis of your -.50 eye before and if both eyes had been -.75 you would have failed then.

You made a wise decision when you went from only wearing your glasses for night driving to wearing them during the day as well. It's really not a bad idea even for the ones that only wear -.50 glasses to wear their glasses anytime they are driving.

Many years ago I was dating a girl that was 17 and she was about to go for her driver's permit.She was smart enough to first go and get her eyes examined a few months before because she was having trouble seeing the board at school. She was prescribed glasses and her prescription was -.50. I had promised her that when she got her permit I would teach her to drive. I was going to be teaching her in my car. I had a 73 Dodge Charger that I ordered special with everything on it so it was my baby. It got washed at least 3 or 4 times a week and waxed at least once a month. Anyway the very first day of her first lesson I told her she needed to wear her glasses. She wasn't very happy with me and she didn't even have her glasses with her. So I drove her home so she could get her glasses. I told her what she did after she got her license and own car was up to her but whenever she would be driving my car she would have to wear her glasses. She wanted to drive bad enough that she didn't put up any argument and when ever I came to get her for a driving lesson from then on she was waiting with her glasses on. She was actually a good learner, or maybe I was a "great" teacher, but she was ready to take the driver's test after only a couple months. I let her drive quite bit once I saw that she was doing really good. After a while she got her own car and I was glad to see that she continued wearing her glasses. Sadly her dad got a job in California and she moved their with them.


anon 08 Feb 2017, 07:57

Mine started at -.50 and -.75. Shortly after went for drivers test and passed the vision part without the glasses. Wore them mostly for night driving, not even TV. Also began wearing for day driving. After a while began noticing more blur without them so wore them more often. Had another exam and came out with -.75 and -1.00. Think I would fail the test today.


Mike 07 Feb 2017, 17:52

Anon, is your prescription similar?


Anon 07 Feb 2017, 14:45

In other words, Ben, it IS a one way street. Not necessarily bad, if you can see better, but I think that any time you adjust to wearing glasses it is almost always one way. I was like you, and thought I didn't really really need them, and tried for a week, and as I noticed more and more how I could not make out out signs and even not so distant phone numbers I realized I had to go full time!


Cactus Jack 05 Feb 2017, 19:04

Ben,

It is a common experience, but people with low myopia have less trouble switching from glasses to no glasses after they get used to seeing well with glasses. It really is your choice, with the exception of situations where poor vision affects the safety of other, such as driving.

More likely, you will decide that you prefer your vision with your glasses. Vision actually occurs in the brain. Your eyes are merely biological cameras. You brain corrects what you "see", IF it knows what you are looking at. Your brain can even generate images with your eyes closed. Ever had a dream?

Part of the suggested two week process is to let your brain learn to deal with images that have been corrected optically. In some ways, it is like a computer algorithm. The brain does not forget an image processing algorithm, but it may complain about having to re-load an algorithm that means it has to go back to work. Like any labor saving tool, it is hard to go back to not using the tool after you have experienced the difference and the comfort.

C/


Ben  05 Feb 2017, 14:16

A friend told me that if I wear glasses full time for 2 weeks then without them everything will be so blurred that I will have no choice but to wear then full time.

I am concerned about taking a chance from not needing them to being dependent?

Is this common?


Soundmanpt 05 Feb 2017, 10:21

MCG

Of course you don't have much choice if you have been told that she needs to wear glasses then you should order them as soon as possible for her. At 6 years old she needs good vision so she can learn and be having trouble seeing at school. Just curious is your daughter small for her age? Because she is only 6 her eyes maybe just slow developing. Her eyesight isn't by any means terrible even if you weren't able to see anything through her prescription. But if your nearsighted that even would make it harder for you to focus with what her glasses would be. And if she is in fact just slwo with her eye development it is very possible that her need for glasses will slowly be reduced and maybe go away completely but that is very hard to predict. That is something you can ask about when you go back to have her re examined Now don't be upset if after she wears her glasses full time for those first 2 weeks and sh goes back for her re exam that they might increase her prescription a bit more. I'm pretty sure the went on the weaker side to let her eyes adjust to her glasses so they will know exactly what she needs. But again as she grows up her need for glasses could lessen or increase.


Cactus Jack 05 Feb 2017, 08:59

Frank,

Unfortunately, that won't work. A narrow field of view is a common complaint about low cost progressives. Premium progressives such as Varilux and other top of the line lens are advertised as having a wider field of view, but they are not cheap. I don't have much experience with progressives. I tried them several years ago and had the same problem. I went back to lined bifocals and trifocals after a week of trying to function with progressives and never looked back. I have never been afflicted with Vanity.

C.


Frank 05 Feb 2017, 03:51

CJ,

Thank you for your feedback. Your advice confirms what I already had in mind. I guess 5 BO it is.

If I may bother you with another question: As I mentioned, I wear an add to reduce the tendency to overconverge at near. However, with the progressives, I really have a crisp, but very narrow field of view when reading - I can't see a full A4 text line clearly without moving my head. (Note: I reduced the PD by 3mm as generally recommended.)

Do you see any value in reducing it to 2mm, or alternatively, to reduce the add (now +1.5) in order to widen the field of view for near vision, or will that lead to other problems?

Thank you for your helpful advice!

Frank


MCG 04 Feb 2017, 19:12

Cactus Jack,

Hi thanks for your explanation.

1)My husband and I both wear glasses (except he had lasik). 2)A referral was sent home from school saying she tested at 20/40 and should have an exam.

We haven't gotten the glasses yet just wandering what the future might hold for her.


Cactus Jack 04 Feb 2017, 18:49

Anon,

Your daughter has very mild Hyperopia (1st number Sphere) with a little Astigmatism (2nd and 3rd numbers Cylinder and Axis). Hyperopia (and Myopia) are caused by a mismatch between the total optical power of the eye's lens system and the length of the eyeball. For Hyperopia, the eyeball is just a tiny bit too short and she needs a bit more Plus to be able to focus. Astigmatism is caused by uneven curvature of the front surface of The Cornea, Astigmatism causes problems, particularly reading text at all distances.

Almost all children are born with Hyperopia because their eyeballs have to be small to fit in their small head. As they grow, the Hyperopia decreases and sometimes turns into Myopia as their eyeballs grow. We don't really know much about the causes of Astigmatism, but typically is does not change very much over time so she may get to deal with that for a long time.

Ultimate eyeball growth is regulated by a person's genes with a small Visual Environment factor thrown in. A few questions:

1. Do you, your wife, grandparents wear glasses, other than for reading?

2. What prompted the eye exam (symptoms)?

One small request. Please decide on a nickname to help keep track of your posts.

C.


 04 Feb 2017, 15:51

My daughter (6) was just prescribed glasses for the first time. The prescription is something like +1.00, -.5, and +1.25, -.75. The Dr. says that she should wear them all the time for 2 weeks and then he is going to re-check the prescription. After that she should wear them all the time at school. He had me look through some crazy contraption with her prescription but I couldn't see a thing. Is her prescription likely to go up to a point she cant see without glasses?


Cactus Jack 04 Feb 2017, 08:38

Mike,

Congratulations, You are almost there. 20/50 means that without your glasses, you see at 20 feet what most other people see at 50 feet. BTW, 20/20 is actually not the best possible vision. It was "typical" vision when Snellen (the creator of the Snellen Chart) did his research many years ago. 20/15 is a little better, but few ECPs try for that.

Full time wear for most people with mild Myopia, as you have, helps keep your Ciliary Muscles (focusing muscles) in good condition. It is often tempting for people with low Myopia and little or no Astigmatism, to read without their glasses. Having low Myopia is like having built in reading glasses.

When you don't wear vision correction, your Ciliary Muscles don't get enough exercise and they tend to get weak. For their size (tiny) the Ciliary Muscles are the strongest muscles in the body. When you don't use them, they get out of condition and that often leads to the symptoms of Presbyopia happening at an earlier age than would naturally occur.

My suggestion is that you wear your glasses full time for 2 weeks. There may be some initial mild discomfort when you focus close (like going to the gym the first few times), but in a few days, your Ciliary Muscles will get used to working a little harder. Also, with full time wear, all your associates will get used to you wearing glasses, and that will be the end of the comments. In many ways it is like getting a new pair of shoes or a different hair cut.

C.


Mike 04 Feb 2017, 08:07

Hey Ben

I'm in the same boat. I'm 30 (must be a 30's thing!) and got prescribed -1 -0.25 180 glasses also last week. I thought it was just normal not to see signs at distance, but had noticed some of my mates could - so after putting it off for a long time I get my eyes checked and letters were not so clear after a few lines. My vision was 20/50. After trying lots of lenses he could get my vision perfect so I could read to the bottom. Technology has got a lot more modern since I last got checked as a teenager.

Choosing glasses was tricky. I got a friend to help and say yay or nay. I was tempted by the not-so-subtle black frames, but ended up going for something a big more discrete. I might upgrade to more designer frames in a few months. First I just want to try them.

I know I'm being melodramatic, but it is a bit of a life shock at first. Suddenly your glasses wearer status changes and you are that guy in glasses. Last weekend I was meeting my mates in the pub and decided to wear them. I was actually really nervous about it - silly really. Anyhow, some teased me but most complemented me.

Cactus you are right about the difference - am quite amazed by the how much detail I can see, especially at night and seeing faces and eyes so sharply. I don't drive currently and work in an office so have been mostly just wearing them at home and at the weekend. Walking around the city is quite different.

I'm curious to know how you get on and how often you end up wearing them - that's my dilemma - whether i'll wear them more often or not.


Cactus Jack 03 Feb 2017, 15:30

Ben,

It is very common for people with mild vision problems to think their vision is just fine. The problem is that you have no frame of reference because it has probably been years since you experienced really good vision.

Like many things, you need to experience something before you decide if it is beneficial or not. With the one exception of driving, when you wear your glasses is really up to you. We often suggest that you should wear you glasses every waking hour, for the first two weeks. That will allow your brain to re-program itself and get used to not having to work so hard. Then you can make a decision about when to wear them.

You may be concerned about what your family, friends, associates and clients will say about your wearing glasses. That is a natural concern, but it only lasts a few days, if that.

I think you might find a true story on the Vision and Specs site interesting. It is about a first time glasses wearer. It is under the Fantasy and True Stories . . . thread titled Macrae's Story. Macrae needs low prescription glasses for Hyperopia (the opposite of yours), but his experiences with the psychology of wearing glasses is similar, no matter what your prescription.

C.


Ben 03 Feb 2017, 12:14

That's -1.00, -0.5 each eye.

I am 32 and work in sales.

I didn't feel things were so bad that I would need to wear them all the time?


Cactus Jack 03 Feb 2017, 10:04

Ben,

If you posted your complete prescription, it means:

OD Right Eye Sphere -1.00

OS Left Eye Sphere -0.50

That means that with your Right eye, everything beyond 1 meter (3.3 feet) everything is increasingly blurry. With your Left Eye everything beyond 2 meters (6.6 feet) is increasingly blurry. If there are more elements to your prescription, they just mean that your vision is worse than that, without correction.

You are probably reading with your Right Eye and using your Left Eye for distance. Most people like to see clearly with BOTH eyes and would wear their glasses full time. But, other than for driving, when you wear your glasses is up to you. Some people actually like blurry vision.

I think you are in for a big surprise when you discover what you have been missing. After you and your friends get used to you wearing glasses, you will wear them all the time. Please don't let Vanity keep you from having good vision.

May I as your age and occupation?

C.


Ben 03 Feb 2017, 09:24

I went for An eye test because my girlfriend thought I couldn't see signs. I got a result of -1.00 - 0.5. I tried on glasses and my girlfriend thought dark frame glasses that aren't subtle might suit me.

I can't imagine wearing glasses at all. It my girlfriend says her friend wears this type of glasses all the time.

Do I need glasses. If so would this be all the time, or sometimes for most people?


Cactus Jack 03 Feb 2017, 07:21

Frank,

Sorry to be slow answering. There is not a lot of difference between 4 and 5. but 5 would probably be more comfortable and help for a longer time. The idea of under correcting prism is to get the two images into capture range and then your Eye Position Control System (EPCS) (my name) can take over an complete the fusion task. be sure and adjust your distance and near PD inward by 0.3 mm per prism diopter so the optical center of your lenses and your central axis of vision are co-incident for the least distortion.

You may also want to investigate Optical 4 Less as a source of higher prism glasses if you need them. I have not checked in many years, but at one time they offered up to 11 diopters of prism. They are more expensive than Zenni, but still less than Mall Opticians.

C.


Cactus Jack 03 Feb 2017, 06:58

Ben,

You do need glasses for distance and to help your eye work as a team. How much you wear them depends on your needs. You definitely should wear them for driving.

We usually suggest that you wear them full time for 2 weeks and then make a decision about when to wear them. Vision actually occurs in the brain, your eyes are just biological cameras. Your brain has the ability to correct images, IF it knows what you are looking at, but it takes a lot of extra energy to do it. After a few days, you may think that your glasses have made your vision worse. That is not true. All that has happened is that your brain has become used to having the images corrected optically and it has stopped its correction process.

Think of your glasses as labor saving tools and you will understand what has happened. You may decide that full time wear is really the better choice. Other than driving, the choice of when, is up to you and probably your GF. She may find your glasses a turn on and that is usually not a bad thing.

C.


Ben 03 Feb 2017, 06:07

I went for An eye test because my girlfriend thought I couldn't see signs. I got a result of -1.00 - 0.5. I tried on glasses and my girlfriend thought dark frame glasses that aren't subtle might suit me.

I can't imagine wearing glasses at all. It my girlfriend says her friend wears this type of glasses all the time.

Do I need glasses. If so would this be all the time, or sometimes for most people?


Frank 30 Jan 2017, 22:32

I recently went to the ECP because of double vision when tired. If looking at distances beyond 3-4 meters, especially in relaxed social environments, it was hard to keep the eyes fused. Usually I only had fusion problems at near (am far-sighted), for which I had ordered an additional add (+1.5), which helped a lot (but I can't do without now :( ). My regular prescription is about +2.5 sph, -2.0 cyl., 3 pdptr BO (i.e. 6 BO in total).

My ECP measured quite high values on the prism test (but didn't want to tell me the values). She suggested I should only increase to 4 prisms BO (i.e. 8 BO in total). I suspect that this is not enough in the long run. Following CJ's test, I have a max. of 15 pdptr in total at the current stage - depending on fatigue level.

I wonder whether I should order 5 BO immediately. However, this would be my last order with cheap online services if my strabismus increases further (most only deliver up to 5 prism dptr at affordable prices - I can't really afford much more). Should I just do the incremental increase and see how it goes, or save money and jump to 5 BO immediately?

Any opinion/experience is welcome!


Soundmanpt 28 Jan 2017, 11:09

Catwoman

Based om your current progression I would think that by 2037 the prescription for your "cat-eye" glasses will be:

O.D. Plano -2.00 180 +4.00

O.S. Plano -1.75 170 +4.00

And you glasses will only be single vision instead of bifocals.

(of course you know i am only kidding, but you never know?)


Catwoman 28 Jan 2017, 10:20

My current prescription, as of the summer of 2016:

OD: -4.00 -2.00 180 +2.75

OS: -5.00 -2.25 170 +2.75

My prescription from 2008, my 1st year with my current eye doctor:

OD: -5.25 -2.00 175 +2.25

OS: -5.50 -2.50 170 +2.25

If all goes well, by 2037 I should have perfect vision. :)


Trent 27 Jan 2017, 19:08

OD: -8.00 -1.75 x017 +2.25

OS: -8.00 -2.00 x162 +2.25

Cyl has decreased and axis changed. First time in my life that my right eye is better than left. Dr. said that the shape of my eyeball changes with age. I have been as high as -8.5 -2.75


Cactus Jack 24 Jan 2017, 08:08

Lee,

Welcome to the "club".

It is amazing that you have been able to function without glasses all these years. Your short sightedness as indicated by the first number (Sphere) in your prescription, helped with close work. The second and third number (Cylinder and Axis) indicate that you have enough Astigmatism to mess up your vision at all distances, but particularly, when you need to read small text such as on your phone.

When you get your distance vision corrected by your glasses, you WILL have trouble focusing close. It is caused by Presbyopia (literally "old eyes"). You will need external help focusing close. That is the purpose of the +3.00 Add.

Because you have lost your ability to focus you have a lot of choices of what to do about it. The simplest choice is a Bifocal Add. You use most of your glasses lens for clear distance vision and there is a small "reading segment" at the bottom of the lens that helps you focus at 33 cm or 13 inches, but you may have a problem using a computer, which is typically about 60 cm or 25 inches away from your eyes.

For that you need an Add of about +1.50 or +1.75. The solution there is either trifocals or variable focus lenses, often called progressives. Which is best for you, depends on your visual environment. Progressives are considered by some as being more cosmetically attractive, but they can have a narrow field of vision and some distortion in the transition from distance to near. Bifocals or Trifocals have visible lines, but offer a wider, distortion free "window". I am 79. My background is Engineering and I prefer trifocals.

I also have a second pair of single vision glasses with my reading prescription. I like to read in bed and they are great for that activity, where there is no need for distance vision.

May I as your occupation and where you live?

C.


Lee 24 Jan 2017, 02:19

Hi all,

I recently went to get my eyes tested as I'm struggling seeing my iPhone ! I'm 60 and the last time I had an eye test was when I was 16, I had glasses that I wore all the time form the age of around 10 to see the blackboard but I seemed to stop wearing them after leaving school.

I was surprised to be told by the optician that I am a bit short sighted but also needed different glasses for close work. They gave me to following prescription:

RE sph -1.25 cyl -1.25 @ 175

LE sph -1.00 cyl -1.00 @ 60

ADD +3.00 both

The optician said I need 2 pairs of glasses or even varifocals, I haven't ordered any as yet as I was taken by surprise, what does all this mean and what should I do?


Maxim 23 Jan 2017, 16:15

Hello Emmy,

I can only encourage you, to wear your glasses permanently. Your collegue might be right saying, that your prescription is a "weak" prescription or not a very dramatic one.

But on the other hand, I cannot imagine walking around, working or functioning properly in everyday life situation without proper vision.

I have already simulated a need for 3,25 resp. 4.00 diopters (with CLs / GOC - adverse contact lenses and glasses over them for correction), and I can confirm - you need correction! You could even not read a car registration plate when you're in front of a parking car!

So tell your collegue nicely, that he is wrong!

When he needs a -12.00 correction, he could not function with glasses of -8.00 only, lacking four diopters of correction!

Best wishes to you, and I'm sure, you're good looking with your glasses!


Emmy 23 Jan 2017, 13:03

Thanks Cactus Jack. I agree its none of his business, it was just the insinuation that I could solve my sore eye problem by just not bothering with any correction at all. Yes I do find using a computer hard without my glasses or contacts so thought it would seem odd not to wear them for that, also recognising people in an office pretty much impossible without them. Both of which are reasons I feel like I need to wear them all the time! I have got some lovely new glasses on order, should get them in the next day or so. Not having them is pretty much a pain!


Cactus Jack 23 Jan 2017, 12:37

Emmy,

It is not any of his business when or where you wear vision correction of any type. Without correction, everything beyond about 11 inches or 28 cm is increasingly blurry. That makes it hard to read or use a computer, not to mention your distance vision.

I urge you to take action to get replacement glasses as soon as possible and consider ordering an inexpensive spare pair from an online retailer. If nothing else, an older pair of glasses with a weaker prescription would be better than not having any correction at all.

C.


Emmy 23 Jan 2017, 10:56

Hi

Have 'lurked' on these boards before but actually have a question/something I'd like to get opinions on. I wear contact lenses with a prescription of -3.25 and -4.00. I recently broke my glasses which I wear sometimes at home or the occasional day at work if my eyes are tired. I was complaining to a colleague of a sore eye today due to this and said I was looking forward to getting some new glasses so I didn't have to wear contacts all the time. He has quite a strong prescription for glasses by the looks of his lenses. He asked me my prescription and said if his was that low, he'd just go without glasses in my situation with the sore eye. Now I know my orrscriotion is not really strong but I feel I n33d glasses/contacts for most activities. But his surprise got me wondering what other people with this sort of prescription do, just for driving and TV or all the time? I originally got glasses when I was a teenager and did just wear them for those activities but as my prescription got stronger I started to rely on them more.


Soundmanpt 20 Jan 2017, 10:51

Jacky

Just as "Cactus Jack" and "George 1968" has already told you it is perfectly understandable that when you take your glasses off that you feel "completely blind" In fact I would say nearly everyone with your same prescription likely feels the same way. Your wearing has in no way worsened your eyesight even though many people claims that their wearing glasses ruined their eyesight. That is complete nonsense. Just as Cactus Jack said without your glasses anything more than 14 inches away from you already starts to become blurry. And of course the further away something is the more blurry it is. So if by wearing glasses allows your to see perfectly at a much further distance why wouldn't you want to wear your glasses?


George1968 20 Jan 2017, 07:24

Jacky,

Is that your first glasses prescription?

If so, the reason that you feel blind without them is the contrast between the vision you had without them, and the vision with them. As you wear them, your eyes and brain adjust, so that when you take them off, the world is blurrier than you remember. Nothing is going wrong with your eyes.

There are no glasses police, so you can wear glasses as often or as little as you want (except for driving, when you now MUST wear them). But, the vast majority of people with glasses of your prescription wear them full-time. That's only bad news if you are uncomfortable wearing your glasses in front of other people. The good news is that if you are wearing them full time, the only time you will be bothered by the blur is when you take off your glasses to go to bed.

My guess is that since there appears to be such a difference in your vision with your glasses on versus glasses off, that you will decide to just wear the glasses.


Cactus Jack 20 Jan 2017, 00:33

Jacky,

It is a fairly low prescription, but even low prescription can make a big difference. Vision actually occurs in the brain. Your eyes are merely biological cameras. Your brain is perfectly capable of correcting blurry images, IF it knows what something is supposed to look like, but it takes lots of effort and energy. Your brain can even generate images with your eyes closed. Ever had a dream?

Your prescription means that without correction, everything beyond about 36 cm or 14 inches is increasingly blurry. Most people think that when they start wearing glasses, the glasses make their vision worse. That really is not true. What happens is that the glasses correct the blur optically and your eyes deliver two very sharp images to your brain. That means that your brain does not have to process the images very much and it simply stops doing it. Think or your glasses as labor saving tools. When you take your glasses off, what you see is what your brain had to work with before you got glasses.

Noting is wrong, just enjoy seeing well with your glasses. Don't worry about what other people say. They have absolutely not right to pass judgement on your vision and what it takes to make it very good.

C.


Jacky  19 Jan 2017, 22:54

Everyone says I have a really low prescription but I feel completely blind without my glasses on. Why is this happening?

Rx:

OD -2.25 -0.50 170

OS -2.00 -0.75 180


Cactus Jack 17 Jan 2017, 15:09

Andy,

You are pretty much there. If you need -1.00 glasses that means that everything beyond 1 meter or about 40 inches is increasingly blurry. When you wear them is pretty much up to you with one exception. If you drive, you should absolutely wear your glasses.

Vision actually occurs in the brain. Your eyes are merely biological cameras. Your brain can correct blurry images IF it knows what something is supposed to look like. Your brain can even generate images with no external input. Ever had a dream?

I suggest that you wear your glasses full time for about 2 weeks and then make a decision about when to wear them. It will take a few days for your brain to get used to the fact that what you see is being corrected optically, by your glasses and it does not need to correct the images. When that occurs, you will think that the glasses have made your vision worse, but that is not really true. All that has happened is that your brain has stopped expending effort and energy correcting the the poor quality images and is using its considerable processing capacity on more productive things.

C.


Andy 17 Jan 2017, 14:31

Hi all,

I just got my eyes tested and my prescription has gone from -0.5 to -1. I'm 30. At what point to people usually start wearing glasses full time. I currently don't wear them that often, but when I get my new glasses tomorrow I might wear them more often.


Soundmanpt 17 Jan 2017, 11:39

Sara

Right now you're still getting used to having glasses and you still getting used to wearing them. That is very normal for most everyone. So it's not surprising that you haven't been wearing them out much yet. There is no big rush in getting started with wearing your glasses in public. I'm pretty certain that you have needed glasses for a while so a few more days isn't a problem. But even wearing them in your house you already know how much better your able to see with your glasses. Of course once you start wearing them outside and your able to see so many things in the distance your going to be even more impressed with your glasses. I don't think you have many suggesting that you should get surgery. But I do think you can expect to get many complements on your looks wearing glasses. And some will want to try your glasses on as well. So have a cleaning cloth with you so you can wipe all the fingerprints off your lenses when they finish trying them on. Let us know how your first day goes wearing glasses in public and around your friends that haven't seen you wearing glasses yet.


Josh 17 Jan 2017, 05:22

Welcome to the glasses club Sara, i bet you look amazing in glasses, your rx isn´t so high so you can wear as you wish, but you notice the difference now, hope you enjoy being a girl with glasses.


George1968 16 Jan 2017, 23:06

Sara,

I think the question is: how do you feel about wearing glasses? Do you feel good in them, or are you not crazy with the look?

It's how you feel. If you like the fact your eyes are not bothering you and you feel fine in terms of how you look in them, what does it matter what others think?

Is there a romantic interest that you will think will object?


Sara 16 Jan 2017, 16:55

I haven't been wearing them out much but I need to wear them now so just going to have to take the comments. It's more aceptable to wear glasses now or people will be telling me to do surgery? I was thinking of wearing contacts but is it better to see with glasses? It can't be a bad thing getting a new prescription because it feels great wearing the glasses


 16 Jan 2017, 16:51


Soundmanpt 15 Jan 2017, 10:25

Sara

You first posted back on Dec 5th that you had gotten your eyes examined and posted your prescription as well. It seems that you only now got your glasses. You may recall that "George 1968" as well as myself told you back then that you would be amazed at how much difference wearing glasses would make to your eyes. Based on your recent post it seems you now also agree. It's very normal for things to appear much brighter with your glasses on. I would assume that aching and stinging feeling you used to get was caused by how hard you were straining your eyes trying to see things. Now of course they aren't straining so i'm sure that your eyes and head feel much better. How much you wear your glasses is completely up to you except for driving which your eyesight is not nearly good enough to be driving without glasses anymore. But even though your glasses aren't really all that strong as you can see they do make a world of difference to you. You're prescription is certainly one that many if not most people would wear their glasses full time, So if you're comfortable wearing your glasses, which it seems you are, then you should wear them full time. As I said back in my comment on Dec 6th because you're 26 you're eyes shouldn't change all that much. You should expect that you will need at least a slight increase in about 12 months as your eyes adjust completely to your glasses. But after that it's very possible you won't need any further increases. What comments have been getting since you got your glasses? Were you slightly shy about wearing them the first time?


Sara 15 Jan 2017, 01:49

I got the glasses and can't believe the difference they make. Everything is brighter clearer and my eyes don't ache when I'm wearing glasses before they use to string. I think I'm going to have to wear them all the time. It feels great getting a new prescription I see why people wear glasses now


Jamie 03 Jan 2017, 12:37

Hi CJ,

Perfect, thanks.

It is mainly for Circuit training and running.

Got to get rid of these Christmas pounds somehow!

I will get some ordered.

Jamie


Cactus Jack 03 Jan 2017, 10:05

Jamie,

It is not unusual for a moderate minus prescription to go down as we get older. Often, people with myopia actually develop a combination of True (Axial) and False (Pseudo) Myopia over time.

When you throw Presbyopia into the mix and start wearing an Add, it minimizes the amount of focusing effort that your Ciliary Muscles and Crystalline Lenses have to provide. The result is that your Ciliary Muscles and Crystalline Lenses gradually relax reducing the False Myopia component. Sometimes that takes a surprisingly long time. The True Myopia component doesn't change much because that would require you eyeballs of shrink some, but like most body structures, once they have grown, they typically don't "ungrow".

For sports wear, I would suggest not bothering with Toric Contact lenses to correct your astigmatism. They are expensive and often hard to keep in the cylinder component in correct angular orientation. It they rotate out of position your vision will change at the most inappropriate moments (Murphy't Law). Instead, you might try a technique where 1/2 of the Cylinder is algebraically added to the Sphere correction and Sphere only contacts are worn. In your case 1/2 of -0.75 is -0.375. Unfortunately, that is not a choice because contacts only come in 0.25 increments in your Sphere prescription. I would suggest considering 1 day disposable contacts Right -3.75 Left -2.75. That is a slight over correction, but I doubt that will cause any problems and your distance vision will be a bit sharper.

You didn't mention the sport you prefer. Your near vision will not be as good as with the Add in your glasses. If you need close vision while involved in sports, we may need to re-think that suggestion.

Also, as we get older, often there is a reduction in tearing action. You may need occasionally use Artificial Tears with a Lubricant to keep your contacts and eyes moist while wearing the contacts.

If you haven't worn contacts in a long time, do not self prescribe and fit. You probably need some refresher training.

Hope this helps.

C.


Jamie  03 Jan 2017, 04:09

Hi CJ,

I have just had a new prescription which seems to be going down rather than up, I am 49 years old.

Old prescription

Right -4.00 -0.50 30 add +1.00

Left -3.50 -0.75 10 add +1.00

New prescription

Right -3.25 -0.75 20 add +1.50

Left -2.25 -0.75 10 add +1.50

I am looking to get some contacts for sport to help me work off Christmas.

I had contacts a long time ago with no issues.

Can you help with converting my new "glasses" prescription into a contacts prescription?

Thanks


Cactus Jack 22 Dec 2016, 23:02

martian1,

There is no way to tell how much effect glasses will have except by trying them. Normally, good vision in both eyes makes driving at night or vision in low light conditions significantly better and less fatiguing. BTW, don't get concerned about the fact that you have a different prescription in your two eyes. The eyes do not grow or develop at the same rate. having the same prescription in both eyes is not very common.

You did not mention where you live. Glasses can be rather expensive in some locations, however, it may be possible for you to order glasses online. I don't usually suggest ordering first glasses online, but the difference in cost might make it worth while to consider it. That would be a low cost way to see if the cost / benefit is acceptable.

Many of us have ordered from Zenni Optical. The lenses are of excellent quality. The primary cost driver is the frame you choose and the lenses, They offer frames as low as US$6.95. There are not very many at that price, but there is a pretty good selection for just a few dollars more. An Antireflective coating is only $4.95 and shipping is about $5.00 in the US.

All you need to order is a credit card, your prescription, and your Pupillary Distance (PD). You PD is easy to measure with a rule marked in mm and a bathroom mirror.

May I ask a few more questions?

1. Where do you live? (country)

2. What is your major? (some require a lot of reading)

If you want to try ordering from an online retailer, we can help you. Please let me know what you would like to do.

C.


martian1 22 Dec 2016, 19:44

cactus jack,

im 24 and im still a student. i went for an eye checkup last yr and i dont need glasses that time. a few wks ago i noticed that my right eye is blurry thats why i went for an eye check up again. will the glasses really make a difference? and is my prescription affect my driving? Thank you for answering


martian1 22 Dec 2016, 19:44

cactus jack,

im 24 and im still a student. i went for an eye checkup last yr and i dont need glasses that time. a few wks ago i noticed that my right eye is blurry thats why i went for an eye check up again. will the glasses really make a difference? and is my prescription affect my driving? Thank you for answering


Cactus Jack 22 Dec 2016, 19:24

martian1,

You have natural Mono-Vision. It is likely that you are using your Left Eye (OS) for distance and you are using your Right Eye (OD) for close things. The answers to your questions depend on several things.

1. Your Age?

2. Your Occupation?

3. Do you need to have good depth perception?

I had a similar prescription when I got my first glasses at 14, except the my Right Eye had the Plano prescription and my Left Eye was -1.50. I don't know for sure how long the condition existed before I got glasses. The primary way it was manifest was that my depth perception was not very good and I could not play baseball because I could not tell there the ball was until I heard it hit the catcher's mitt or it hit me. Of course no on wanted me on their team.

You probably should get glasses and wear them full time, so your eyes learn to work together.

C.


martian1 22 Dec 2016, 17:24

Hello everyone, my prescription is OS plano OD -1.0 should i get glasses? if yes should i wear it full time?


George1968 18 Dec 2016, 15:12

Amelia,

What is your prescription? Do you feel you need your glasses for fulltime wear, or do you want to wear them fulltime because of the look?


Cactus Jack 18 Dec 2016, 13:48

Amelia,

Your experiences are typical of the difference between a chain and an independent ECP. The chains are OK for most people and the exam they typically offer is better than just looking into an Auto Refractor. I often suggest a more through exam for a "Baseline" eye and overall health assessment or if there appears to be a need.

I have relatively frequent (annual) dilated Retinal exams because I have Diabetes. A dilated Retinal exam is considered the Gold Standard for Retinal exams, but the Optomap is nice for a quick intermediate check, without dilation. Fortunately, my Diabetes has been well controlled for many years and I have no Retinal damage .

Many "silent killer" health situations are first discovered during an eye exam. The eyes are windows into the body.

C.


Amelia 18 Dec 2016, 13:09

I went for an eye test the other day, I spent quite a bit researching reviews for local opticians as I have not had great experiences at high street chains. I have always felt very rushed and anxious during the exam and never given clear advice on what my prescription means. I went to a family run independent place and it was the most comprehensive test I've had, felt very listened to and the optometrist wasn't afraid to give me clear advice about wearing my glasses more and even reassuring me not to worry if I start wearing bthem more and wanting to wear them all the time. It was the green light I needed to finally feel it's ok to wear my glasses as previous high street chains have never told me what it means or have been quite dismissive of my prescription. He also assessed my retinas using an optomap which was incredible seeing an exceptionally detailed photo of most of my retina, better than those standard retina cameras. Has anyone else had an optomap done? What are other people's experiences of using independent places over chains?


george1968 17 Dec 2016, 21:19

Georgie,

Forgot to ask -- how do you like yourself in glasses? Are you comfortable wearing them or are you self-conscious?

I was very self-conscious about wearing mine even with a much stronger prescription than yours. Finally, my eyes got to the point that I had no choice but fulltime wear. After a week, I realized how silly I had been so self-conscious. If I had to do it again, I would have gone fulltime years earlier.


george1968 17 Dec 2016, 16:41

Georgie,

Glad you find the glasses are working out for you. Let us know what your friends have to say about your glasses.

You might find that with your astigmatism that your glasses will help, esp. When they get tired at the end of the day.

Good luck.


georgie 17 Dec 2016, 15:08

They were ready a lot quicker than I thought so picked them up yesterday


georgie 17 Dec 2016, 15:07

Hi yes I have picked them up, I've not worn them much until today, I decided to put them on and head into town to go shopping, what a difference it made, everything was just crystal clear and just felt so much easier to pick out fiber detail of things in distance, felt more confident walking around if that makes sense. I am going to wear them again tomorrow when I am out with friends. First time they will see them. Not sure I will wear them at work though as I am on a computer all day.


george1968 17 Dec 2016, 00:26

Georgie,

Did you get your glasses yet? If so, what has been your experience with them?


Soundmanpt 11 Dec 2016, 13:35

georgie

You don't have to spend a lot of money on glasses for them to look good on you. Most often expensive glasses are designer glasses anyway and your only paying for the name of the designer. If you already knew that your eyesight wasn't perfect anymore you must not have been too surprised to be told that you need glasses now? As I said before your prescription isn't strong at all, but i'm sure once you get your glasses you're going to notice the difference rather quickly when you put them on. Now as for not wanting to be reliant on your glasses. Your eyesight isn't nearly so bad that you won't be able to function without your glasses anymore. But wearing glasses is a choice and it will be up to you how well you want to see things clearly. In other words you should expect that as your eyes adjust to your glasses things at even a short distance is going to seem much more blurry than they do now. But even without your glasses you will still be able to see quite well, just better with your glasses on. I consider someone as being reliant or dependent on their glasses when they can't see to do hardly anything without their glasses. That won't be you. You're not unlike most about being nervous being seen for the first time wearing your glasses. just remember that everyone that wears glasses has had to go through the exact same thing. One thing you should be doing now is telling everyone you know that you're getting glasses. That really helps rather then just suddenly showing up wearing glasses. That way by they will be expecting to see you wearing glasses when you get them. This really does make it easier.Also have you not noticed just how many people now wear glasses? I'm sure you have lots of friends that wear glasses. So your wearing glasses isn't really going to be so shocking to them anyway. If you do lots of work on a computer they probably you will be wearing glasses at some point anyway. What you can expect is getting lots of complements on how nice you look wearing glasses. And after the first couple days and everyone has seen you wearing glasses no one will even pay any attention to you wearing glasses.


georgie 11 Dec 2016, 11:56

I am due to pick glasses up next week mid week approx, I didn't spend a large amount on them but tried my best to choose a frame that I thought complimented my face. I am apprehensive about wearing them as I do not want to become reliant on them, its been a shock hearing that I do need glasses, I always thought my eyesight wasn't perfect but not to the level that I need glasses. I will make an effort to wear them but feeling nervous as no one knows that I have been for an eyetest


Soundmanpt 11 Dec 2016, 11:31

georgie

The advice you have been given by "Likelenses" and "Maxim" is exactly right. Since you have never wore glasses before i'm sure at first it is going to feel strange wearing glasses. So you need to get used to the way glasses feel for one thing. And even more importantly your eyes need to adjust to the prescription of your glasses. Even though your prescription isn't a strong one, your eyes are used to not seeing things as clearly as they should. So at first your eyes are actually going to be trying to ignore the prescription of the glasses. So you need to wear them full time so your eyes can slowly start to relax and allow your eyes to be helped by your glasses. Then after a couple weeks of wearing your glasses full time you will be able to tell when you need to wear your glasses and when you can can get by without them. Your doctor's advice to wear them for distance activities is correct. So as he suggested they will help you see the TV better, even if you think you are seeing it fine now without glasses, but your not. So I know for sure your glasses will be useful for going to sporting events and concerts. If you enjoy reading books you probably won't need them for that but you mentioned that your job involves a good deal of work on a computer. Because a computer monitor is usually about 24" away from your eyes you may wearing your glasses helpful for that as well. Remember the whole idea of getting glasses is so your eyes aren't straining. With your name being "georgie" it is only a guess that you are a female. So like Maxim said hopefully you took your time and chose glasses that look good on you. many times people will be thinking in terms of money and that they likely won't be wearing their glasses very often so it doesn't matter what their glasses look like. But since you don't really know how much you will be wearing them you want your glasses to look nice and flattering when you do wear them.


Maxim 11 Dec 2016, 07:55

Congratulations!

With full-time wearing you will soon find out, in what great detail you can see, and you will forget about those reflections of wearing or not wearing the glases.

I hope, you have choosen nice frames, because wearing glasses is "to see and to be seen".

Best wishes, ...


georgie 11 Dec 2016, 01:04

I am 30 years old and work as a housing officer for a local authority, involves interviewing people who make housing applications so a lot of time is spent on the computer. Oh I didn't know you should wear them full time when you first get them. I am waiting for them to be made should be ready mid week next week.


Likelenses 10 Dec 2016, 22:18

georgie

Your prescription is pretty much what a first prescription would be.

As you have perhaps read in some of these threads,it is best to wear a new prescription full time for about two weeks to get used to them,and then determine what, and when you want to wear them for.

If you can tell us your age, and occupation we may be able to tell you more.

Are your glasses on order, or do you already have them?


georgie 10 Dec 2016, 11:50

I went for an eye test today just out of interest and also because I haven't had an eye test in many years, haven't had any problems but I've been working with people who have had quite serious sight problems and prompted me to get checked out. Wasn't expecting to be given a prescription for glasses but I was! I thought my eyesight was ok, not perfect but good enough not go need glasses but as soon as he put the electronic chart up and covered my left eye I thought uh oh this is not starting well, it was blurry after the first few lines. I tried my best to read further down but he said I can see you are struggling let's put some lenses in and help you out. He said I should wear them for distance activities such as watching the TV, however apart from.reading the TV guide which is ever so.slightly off focus, I don't think I need them for the tv, I don't drive but he said if I do start driving then I should wear them as I am borderline driving standard without. My prescription is -.75 sph, -.50 cyl, 10 axis left eye and right eye is -.75 sph, -.25 15.


Soundmanpt 06 Dec 2016, 09:33

Sara

Everything that "George1968" told you is completely correct. I'm sure that when you get your glasses and put them on for the first time you will be amazed at the difference you will see. You just don't realize how much you have been missing and not seeing properly. With your glasses everything is going to look so much brighter and your vision will be clear and sharp. I'm sure at some time you have likely heard someone say that wearing glasses made their eyesight worse. But in reality their glasses didn't make their vision worse at all, but instead what really happened is just what George said, by wearing their glasses their eyes aren't straining anymore to see things and they became much more relaxed with their glasses on. Then when they take off their glasses their eyes are really seeing things as they really appear without straining. So for some they just think that wearing glasses caused their eyes to get worse. There is no way to predict how much your eyes might change over the next couple years, but since you're already 26 I also would doubt that your eyes will change much. Actually I would think that it is likely after about 12 months you might need a slight increase in your glasses and probably not need any more changes after that.

The best way to adjust to your glasses when you get them is to make a point to wear them full time from the time you get up until you go back to bed for about a week or 10 days and then you can decide how much and when you need to wear your glasses. You're the only one that can tell how much blur you're willing to tolerate without your glasses. You may decide that you really like being able ot see everything nice and clear and continue to wear your glasses full time or you may feel like it isn't necessary to see things so clearly and only wear your glasses for driving and other distant things. By the way when you choose to wear your glasses is totally up to you except for driving. Your eyesight isn't good enough to pass any driver's test for driving without glasses so driving without glasses is not only putting you in danger but others as well. Please give us an update once you get your glasses about what you think of wearing glasses.


George1968 05 Dec 2016, 20:58

Sara,

The first number for each eye measures how nearsighted you are. You are nearsighted enough that glasses will make a difference, but, except for driving, it would be up to you how much you want to wear them.

The second number measures the amount of astigmatism you have. You might have less eye strain if you wear your glasses, but that is up to your comfort level.

Your eyes will not get worse by wearing glasses. Now, your eye muscles have been straining, and wearing glasses will help them relax. So, it might seem that after wearing your glasses, your eyes will seem worse, but it is just the eye muscles relaxing. There is a possibility that your eyes will need a slight increase in strength in the next 6 months to a year. At 26, though, your eyes won't change much more, if at all.

Hope this helps.


Sara 05 Dec 2016, 17:10

I finally went to the opticians and got my eyes tested and I'm shortsighted -1.50 -0.25 110 -1.25 -0.50 120 I've been told I should be wearing glasses all the time. I was having a lot of eyestrain so decided to get my eyes checked. They have told me my eyes will get worse so would need glasses anyway. How bad will they get, will I really not be able to see without glasses if I wear them all the time? I'm 26 when does shortsightedness and astigmatism stop?


Michael 24 Oct 2016, 15:30

Mike-That is what I thought. But you can see that even a weak add is going to make a big difference. But unfortunately you will find in a year or two you will need a stronger add as small print will become more and more difficult to read.


Mike 24 Oct 2016, 14:15

Hi Michael

The readers are +1 and only been using them over my contacts to read for about a week. The new glasses have been ordered and should be here in the next ten days.


Michael 23 Oct 2016, 13:35

Mike- How long have you been wearing the drugstore readers? But you are definitely right around the age when presbyopia begins setting in. It sometimes happens a little earlier or a little later but it eventually gets everybody so it shouldn't be surprising or depressing.But you will find out every year or two until your eyes lose all of their elasticity reading small print will become more and more difficult so you will keep on needing stronger adds. I am 63 years old and wear progressives and my add has been 2.50 for a number of years now so I don't expect it will ever be higher. I think 2.50 is about as high as most adds go although it can go up to around 3.00 if you like to hold your reading material very close.

What strength drugstore readers are you wearing now? You are wearing them with your contacts am I correct? My guess is they are probably +1.00 which are the weakest you can buy and the weakest most doctors will prescribe.But even though they are weak they still are strong enough to make a difference. But unfortunately you will likely need stronger adds every year or two for a number of years. And there is really nothing you can do about it. It is something all of us have to eventually deal with.

There are some other options but I don't know how good they are. Bifocal contacts are one option. And some people might do mono vision and have one contact correct their near vision and the other one correct their distance vision. But since you have astigmatism as well not sure how well that would work. You can always wear readers with your contacts like you are doing now. But when you decide to wear glasses instead of contacts you then will need multi focal lenses like you are getting.


Mike 23 Oct 2016, 12:41

Thanks Michael for your reply. I'm currently wearing what you would call drugstore readers and the difference with and without is them is notable and if I'm honest, very surprising and a little bit depressing


Michael 23 Oct 2016, 11:31

Mike- You seem to have the very beginning signs of presbyopia given your age and an add of 1.00. That is the lowest add I think any doctor will prescribe.And even if you checked out drugstore readers I think you will find that 1.00 is the lowest power they have.But your add figures to gradually go up each year or two until all the elasticity in your eyes is gone. You probably will never need an add of more than 2.50 or 3.00 at the most unless you like to hold your reading material very close. And once you reach that point the chances are you won't ever need any more reading help unless you develop some other eye problems.


Mike 23 Oct 2016, 01:01

New prescription

Right -3.5, -.75, 90 with +1 add for near vision

Left -4, -.75. 90 with +1 add for near vision

First pair of varifocals ordered and on their way.

I'm 43 and been wearing contacts since I was 18.


Cactus Jack 18 Oct 2016, 21:28

Cork,

The old prescription is written in - Cylinder notation. the new one is in + Cylinder notation. The first step is to convert the new prescription to - Cylinder to make the comparison.

The old prescription Is in - Cylinder and I have expanded it for clarity

OD Sphere -5.25, Cylinder -1.00, Axis 20

OS Sphere -5.00, Cylinder -1.50, Axis 162

The new one was in + Cylinder. I have converted it to - Cylinder for easier comparison :

OD Sphere -5.25, Cylinder -1.50, Axis 20

OS Sphere -4.75, Cylinder -1.00, Axis 160

The conversion procedure is to Algebraically Add the Cylinder to the Sphere, change the sign on the Cylinder, and add or subtract 90 degrees to the Axis to keep the value between 0 degrees and 180 degrees.

It really does not matter which notation is used. Typically, Optometrists and Optician use - Cylinder and Medical Doctors use + Cylinder, but the one they use depends on how their instruments are set up. Lens makers convert + Cylinder to - Cylinder, as I did, and make the lenses. If the conversion is done correctly, the resulting glasses will be optically identical no mater which notation is used.

The primary difference is in the Cylinder correction for Astigmatism. It is change is well within expected results.

C.


Cork 18 Oct 2016, 19:43

My wife's old prescription was:

-5.25 -1 20

-5.00 -1.50 162

The new one is:

-6.75 +1.50 110

-5.75 +1 070

Is this a big difference? She says these

glasses are much better.


Dan 18 Oct 2016, 11:52

That makes sense Tony, just a bit confusing with being in the prism column. Thanks.


Plus Tony 18 Oct 2016, 11:31

Dan

My guess is that the M means minus and the P plus. Optometrists and eye doctors usually highlight the fact that someone has a plus sphere correction in one eye and a minus sphere correction in the other by writing something like this. This helps avoid confusion in the lab when glasses are being made up.


Dan 18 Oct 2016, 04:48

Can anybody help, my 23 year old daughter has just had a routine eye exam, the optician said she had a mild prescription and only needed glasses if she felt she wanted them. (She's declined for now) however in the prism section on the prescription the right eye has a capital (M) in brackets and the left eye a (P) does anybody know what these mean, her full prescription is

Right, sphere -0.25, prism (M)

Left, sphere+0.50, Cyl -1.00, axis 160, prism (P)

Thanks


Motard 04 Oct 2016, 03:54

Thanks CJ , I know pd already , you helped me with a goc combo in Oct 2014 I can tell in the 2 years since, my rx has crept up since then . I can now while difficult and taking a lot of effort I can accommodate to the combo with out the + CL


Cactus Jack 03 Oct 2016, 23:53

Motard,

Using a Vertex Distance of 12 mm I suggest the following glasses prescription:

Calculated by successive approximation

R -7.75d -2.25c 20x

L -6.50d -2.25c 170x

or, for a little more crispness

R -8.00d -2.25c 20x

L -6.75d -2.25c 170x

Normally, contact lens prescriptions are derived from the refracted prescription. Phoroptors and trial lens frames have about the same vertex distance as glasses. However, the actual Axis numbers on the Phoroptor and In glasses can be in increments of 1 degree. Toric Contact lenses are available in 5 degree increments. Your Cylinder correction, while significant, is low enough that no Vertex Distance correction is required.

The best source of a glasses prescription would be from the Examiner that did your refraction and then calculated the CL prescription. If you order glasses from Zenni, you might consider ordering the lowest cost frames to make sure which prescription you like and then ordering nicer frames, lenses and options.

If you don't have your PD or don't know how to measure it, let us know. Also, which prescription you like best.

C.


Motard 03 Oct 2016, 23:13

Hey everyone, been a while since I posted . I got a new CL rx a few months ago but noticed the glasses rx was unchanged or not updated for a few years ago as I use insurance for contacts and buy zenni's online.

Most recent CL 8/2016

R -7.00d -2.25c 20x

L -6.00d -2.25c 170x

Last Glasses Ex

R -6.75d -1.75c 20x

L -5.50d -1.75c 170x

Can CJ or Sndmnpt vertex the CL up to glasses as I don't see the glasses working very well as I was under impression glasses are higher rx on the minus side.

Thanks


Soundmanpt 14 Sep 2016, 09:58

Cara

Actually that number might even be on the low side since the latest numbers says that over 70% wear some type of vision correction and still rising. I don't know if that includes those that had lasik or not.


Cara 13 Sep 2016, 17:37

If your parents are shortsighted you will be too. If others in your family are shortsighted there's another chance you will be. If not you could be shortsighted. So more people are getting shortsighted so soon it will be normal to be shortsighted? Will everyone be shortsighted in a few years or will it get better?

Is it true 1 in every 2 now has it?


Mr Jules 15 Aug 2016, 10:38

Had an eye test on 6 Aug 2016. Previous test was Sept 2014.

Right: sphere +1.50, cylinder -0.50, axis 155

Left: sphere +1.50, cylinder -0.50, axis 20

Reading addition +2.25 (previously +1.75)

For the time being, I'll carry on with my current varifocal lenses. New lenses for my existing frames are expensive. But I am having a pair of single vision reading glasses reglazed with new +3.75 lenses.


Curt 04 Jun 2016, 09:28

Please don't troll someone who posts the same response 5 times and won't even use their name.


Soundmanpt 04 Jun 2016, 08:43

no name

Are you aware that China is known for their lens not only for glasses but cameras and other things that require quality lenses? I have over the year bought several hundred pairs of glasses from Zenni and a few others and I have many people I know very well that are opticians and I used to get the prescriptions checked for accuracy when I received the glasses from Zenni before delivering them to the patient and in every case the rx was dead on. In fact after a few times one optician even commented that she wished their lab were as good as Zenni.


 04 Jun 2016, 01:01

Don't buy cheap lenses from China, that will ruin your eyes., and don' listen to these pervs. Get a real optician to fit you.


 04 Jun 2016, 01:01

Don't buy cheap lenses from China, that will ruin your eyes., and don' listen to these pervs. Get a real optician to fit you.


 04 Jun 2016, 01:01

Don't buy cheap lenses from China, that will ruin your eyes., and don' listen to these pervs. Get a real optician to fit you.


 04 Jun 2016, 01:01

Don't buy cheap lenses from China, that will ruin your eyes., and don' listen to these pervs. Get a real optician to fit you.


 04 Jun 2016, 01:01

Don't buy cheap lenses from China, that will ruin your eyes., and don' listen to these pervs. Get a real optician to fit you.


Melyssa 02 Jun 2016, 04:51

Cara,

In 1983 I was curious about trying contact lenses, having worn glasses for 19 years at the time. With what was at least a -7.00 RX with lots of astigmatism, the ophthalmologist told me that only hard contacts would work. I tried one and had to get it out of my eye within two seconds as it hurt so much. The following year I purchased my first pair of drop-temples. Since then I love wearing big, bold, and beautiful glasses, and I don't care how far contacts have come since then.


Soundmanpt 01 Jun 2016, 16:56

Cara

I didn't provide and answer because I really don't know for sure when soft disposable lenses first became available to the public. I know it was after the 60's because during the 60's quite a few movies often had some girl at a high school or college dance lose a contact and in those days they were hard lenses that you kept for a full year if possible and they were quite expensive so everyone was down on the floor on their hands and knees trying to find the lost small disk. A difficult task considering they were very small and clear so not easy to see so feeling around was the best idea. My best guess would be maybe sometime in the late 70's or early 80's.


Cara 01 Jun 2016, 15:54

Yes I got them from the opticians now have to wait for them. Is annoying having to wait for them because want to start wearing them with an up to date prescription. Yes had to have thinner lenses wouldn't look good with standard lenses. Is exspenive being shortsighted hope they last a few years now.

So when did disposable contacts become popular? I've been told hard contacts from years ago were horrible to wear so you had no choice to wear glasses?


Soundmanpt 01 Jun 2016, 15:25

Cara

Did you get your glasses on line or at a local optical shop? I'm sure they are right about seeing quite few needing -6.00 lenses or even stronger. I assume the reason your paying extra for your glasses is because they sold you hi-index lenses (thinner) which is always additional. But your glasses should look very nice with your lenses being thinner. If your ever interested in saving a lot of money on your glasses let me know and I will be more than happy to guide you with ordering glasses on line. Just for fun you should go on line and take a look at what (zennioptical.com) has to offer. For single vision glasses with moderate thin lenses you will find well over 800 for under $12.95 and with the additional for getting AR coating (anti-reflective) you need to add $5.00 more. But going to a slightly thinner lens add another $19.00 and your prescription doesn't require anymore than that so your total price for really great looking glasses would be around $36.00. If you got your glasses at a shop I am sure you paid much more than that for them.


Cara 01 Jun 2016, 11:07

I've ordered new glasses and had to pay extra because of my -6.00 I don't mind wearing glasses but they said a lot of people with my sort of prescription wear contacts so being that shortsight sighted is very common and you would be surprised how many people have it.

My grandmother is shortsighted and has always worn glasses because there was no other option years ago. When did people start wearing soft contacts dissopables?


Soundmanpt 27 May 2016, 07:20

Cara

I'm inclined to think your probably right. First of all the percentage of people that now wear some form of vision correction has gone up considerably over the past 20 years or so. I saw recently that now nearly 75% of of the population wear correction up from 50% not that long ago. The percent is even higher for women compared to men. There is little doubt that the demand on the eyes is far greater than it was 25 years ago. Hard to believe that cell phones have really only been around for about 25 years or at least at a price where the general public could afford them. I wasn't one of the first ones to get a hand held phone but not tgoo far behind either and I still have my original phone number which the last 4 numbers was when I got it 1296 (Dec 1996) It was a flip phone about the size of a baseball and pretty heavy. Off track a bit but I doubt hardly anyone under 30 knows that when the first of these phones came out you didn't get them from a store like you do now. You actually could only get a cell phone from a new car dealership. The reason why is because just before cell phones came about there was car phones which had to be hooked up in the trunk and a lot of wiring done to get the phone with a cord under the dash of your car. Oh and those early car phones cost about $2,000.00. Anyway when the first computers started to be available they were extremely hard on the eyes. The background was a very harsh orange color and strained the eyes badly. Now people can't live without all these devices and carry them everywhere they go. I think the increase in women wearing glasses could be due to in large part in the 50's - 60's and even the 70's women were didn't makeup much of the work force but were stay at home moms in those days. But since then more and more women now hold many office type jobs which is exposing their eyes more to these demands on the eyes. And now in recent years wearing glasses has actually become much more popular than it was even 10 or 15 years ago so their more likely to not only start wearing glasses sooner than they would have but are even wearing them more often now. Yesterday I found an article in Yahoo that surprised me. It said that people getting lasik has dropped off since 2007 when 1.5 million got it done to 640,000 in 2015. That is a huge drop off considering the price for lasik really hasn't changed and if anything maybe even gone down slightly. What that means is that even with the number of people needing vision correction increasing they prefer to wear glasses or contacts rather than get lasik.


Cara 26 May 2016, 11:23

Yes they said more people are shortsighted than ever and it's getting worse. Lots of people need glasses for driving. Will that mean more people have to wear glasses with stronger prescription in future. It's good attitudes have changed wasn't long ago you wouldn't want to be seen with glasses.


Likelenses 24 May 2016, 22:23

Denise

Congratulations on being a bifocal babe!


Cactus Jack 24 May 2016, 14:37

Denise,

The Axis difference between your right eye (OD) and your left eye (OS) is only 18 degrees. Here is why.

By tradition, Cylinder Axis of 0 degrees or 180 degrees is horizontal and the Axis number is never greater than 180 degrees. The Axis numbers increase in a Counter-Clockwise direction, looking at the patient. Clockwise from the patient's viewpoint. 90 degrees is Vertical.

C.


Soundmanpt 24 May 2016, 11:15

Denise

Looking at your prescription everything looks just fine. It is very common that the axis numbers are so different. Remember that axis is important but is NOT a power value. It is just the placement of your lenses in your frame of your glasses. So don't worry your glasses are fine.

So seeing that you have a weak add would I be correct in assuming these are your first bifocals? If you don't mind a word of warning> Take care walking off curbs and going up and down steps and be even more careful if your wearing heels. Try hard not to look down when your on steps. By looking down if your eyes are looking through the add segment things are going to look much closer than they really are to you.


Denise 24 May 2016, 10:09

Could I have an Axis of 018(OD) and an Axis of 180(OS)? It seemed strange that they were so disparate, and I suspect that it is a typo. For both OD and OS my spere is -2.75, cyl is -0.25 and Near Add for both is +1.25.


Soundmanpt 23 May 2016, 08:54

Cara

You basically described it pretty well in saying that at -1.00 you would need glasses for driving and at -2.00 most would likely be wearing glasses full time. Not always but the majority of people get their eyesight from their parents genes. So if a parent was quite shortsighted there was about a 50% chance that any children would also be quite shortsighted as they grew up. The reason for the difference in necessities of strength is caused by the lengthening of the eyeball as your body grows and changes. But like anything there is always exceptions to the rules meaning one might become shortsighted when the parents and even grandparents never was shortsighted.


Cara 22 May 2016, 11:37

At -1.00 people would need for driving but at -2.00 you need all the time? So they say most people that are shortsighted have to wear glasses/lenses all the time any way. The difference is they can still see but blurry without. I can't see nothing with them on. Being shortsighted isn't a new problem because people wore glasses years ago but why are people more shorsighted than others?


Maxim 15 May 2016, 10:59

https://en.wikipedia.org/wiki/Eyeglass_prescription#/media/File:Snellen-myopia.png


Maxim 15 May 2016, 09:16

Interesting, not always easy to understand:

http://www.visualopticslab.com/opti535/lectures/class07_08.pdf


Maxim 15 May 2016, 09:00

to Cara

I think, you should not worry too much about your vision needs.

Glasses with a correction of -6.00 should give you functionally a very good vision. When your eyes are healthy (that's what I'm hoping), you are at a vision of 1.0, or at 100% at least.

When my daughter got glasses, I started experiments wearing contact lenses, now with a power of +8.00 on both eyes, and the corresponding correction with glasses (total of -8.00).

I can use this, I immediately enjoy perfect vision and after 3 minutes I have forgotten, that I'm wearing these -8.00 glasses.

I recently wore this combination while travelling 600 miles, 8 hours approximately). Returning home I am always at risk, that somebody (family, neighbours, collegues, friends) might see this totally different glasses, as I really could forget to change them again before returning home (I'm at R +3.00 / L + 2.75 plus astigmatism - a prescription totally different - slightly magnifying, and for reading and near work at +5.25/+5.00))

If you choose nice frames, all the people around you will love your appearance.

Good luck to you, sincerely ..


Soundmanpt 15 May 2016, 07:50

Cara

The optic field considers -7.00 and up as being a strong prescription. So your prescription is considered as moderate strong. I am not really sure what the most common nearsighted prescription is excluding astigmatism is but I saw a lot of -2.75 to -4.00 lenses being pulled out of stock. So like you were told when you got your eyes examined i'm sure that they have seen a good number of prescriptions stronger than yours. When your talking about -1.00 prescriptions that would be considered a weak prescription and even the -2.00 would be moderately weak. Prescriptions for -1.00 glasses are often a first prescription.


REd 14 May 2016, 14:15

Cara,

This link says you are on the borderline between medium and high. I'm about the same as you;I would not worry about it.

https://en.wikipedia.org/wiki/Myopia#Degree


Cara 14 May 2016, 13:17

I was at the opticians today when we was talking about my prescription I'm shortsighted -6.00 they said was a high prescription but not the worst they see. Most people that are shortsighted are with -1.00 or -2.00? Is that true? I know my eyes are bad because I can't go without glasses but is -6.00 really high prescription?


Glover 08 Apr 2016, 08:06

Neal,

To answer your questions about lateral progressives, the add portion is on the side of the lens instead of on the bottom.


George1968 29 Mar 2016, 13:43

Natasha,

Are you wearing your glasses full time now?


Natasha 29 Mar 2016, 09:18

Soundmanpt, you must be an eye doctor because you're absolutely right. The read out from the machine (I think it's called an automatic refraction device or something) was higher but the doctor decided that I should start at a lower prescription because this is my first pair. I think the left eye in particular should have been -2.25 or something because I couldn't really see the bottom line with the -1.75 lens.


Natasha 29 Mar 2016, 09:18

Soundmanpt, you must be an eye doctor because you're absolutely right. The read out from the machine (I think it's called an automatic refraction device or something) was higher but the doctor decided that I should start at a lower prescription because this is my first pair. I think the left eye in particular should have been -2.25 or something because I couldn't really see the bottom line with the -1.75 lens.


Soundmanpt 29 Mar 2016, 08:53

Natasha

Since your already 19 years old i really don't think you will get anywhere close to needing -6.00 glasses. Yes without any doubt you're going to need an increase in less than a year. The reason I am so sure about that is because when you got your eyes examined they had to extremely strained. That makes it more difficult for the optometrist to refract your eyes as much as they need to be. This usually leads to you getting a little weaker prescription than you really need. So in few months you can expect that your glasses are going to start to feel a little too weak for your eyes. Your next eye exam will be much more accurate since your wearing glasses now and your eyes won't be nearly as badly strained as they were with your recent eye exam. You can expect to need about -.75 or -1.00 increase next time. But in your future eye exams they could be much less more like -.50 and no one can predict when your eye might become stable and you won't even need anymore increases, but it could be as close as 2 years away. It is very possible that you may become stable somewhere in the -3.00's.


Natasha 29 Mar 2016, 08:28

Thanks for all the replies! Likelenses, I can't imagine what -6 must be like. I guess I'll find out once I get there :(


Soundmanpt 29 Mar 2016, 08:04

Natasha

First of all I will try not to repeat what the others have already answered you about your eyesight. When the doctor told you that your uncorrected vision is 20/100 what that means is that when someone has what we call "perfect vision" it means they have 20/20 vision and that means that they are able to see clearly at 20 feet what should be seen normally at that distance. But in your case seeing 20/100 means you need to be as close as 20 feet in order to see what someone with 20/20 vision can see at 100 feet. So what that means is your unable to see very well at a distance without your glasses. Now as your eyes are adjusting to your glasses it is to be expected that now when you take your glasses off things are going to be considerably more blurry than before you got your glasses. Before you got your glasses your eye were just accommodating in order to se what you were able to see. But along with that you straining your eyes badly. There is no glasses police but many people once they get to around -1.50 pretty much start keeping their glasses on at all times. I'm sure your eyes feel much better now when your wearing your glasses and they should become more and more comfortable to wear that if your not already wearing your glasses all the time you may want to start. College is very demanding not just for good grades but also on your eye which probably are happy for the help. And no is your prescription isn't strong at all even though i'm sure they probably seem strong to you when you take them off and can't see very well. I can tell you that you can expect to need an increase in your prescription most likely in about 6-9 months but after that you shouldn't need an increase for 12 months. Tell us more about how it felt wearing glasses for the first time around your fellow students and friends. I would guess that you were nervous wearing them that first day?


Melyssa 29 Mar 2016, 04:40

Natasha,

I began with a prescription of -1.75/-1.50, 52 years ago this coming Sunday. I wore my simply gaw-juss brown modified cat's-eyes (clear at the bottom) at school to see the blackboard, at home to watch TV, or to see what was on the big screen at the movies.


Likelenses 29 Mar 2016, 00:42

Natasha

You most likely have been nearsighted for several years.

Usually a first prescription is -.50,or -1.00.

Since you are only nineteen,you will have a few increases in your prescription until 22, to 25,at which your myopia should stabilize.

Until then you can expect your prescription to increase between -.50 ,to -1.00 yearly.

Your prescription when your eyes stabilize will be somewhere around -3.75,to -6.00.

College does a job on the nearsighted eyes.


Weirdeyes 28 Mar 2016, 22:34

Natasha

It depends what activities you do. If you study or drive you will struggle quite a bit without glasses. You're prescription is still pretty mild, so you don't have to worry about thick lenses.


Natasha 28 Mar 2016, 21:42

I'm 19 and in college. Is 20/125 very bad? I didn't feel so impaired before wearing the glasses and taking them off!


Likelenses 28 Mar 2016, 21:24

Natasha

Welcome to being a glasses girl.

I think the doctor is being a bit on the conservative side,your vision without glasses is most likely 20/125.

Actually a fairly strong first prescription.

What is your age,and are you a student,or what type of work do you do?


Natasha 28 Mar 2016, 21:00

Hi,

I was advised to start wearing glasses to correct my nearsightedness. The prescription is -1.75 D in both eyes (in the column SPH). Is my vision quite poor? The doctor said that my uncorrected vision is 20/100 in both eyes.

Can someone explain these numbers?


GL 24 Mar 2016, 22:21

To the anonymous poster; What a prude. I'm sure you'd make a good pope.


 24 Mar 2016, 21:30

GL

You're disgusting


GL 24 Mar 2016, 20:53

Thick lenses = lick lenses.


Likelenses 24 Mar 2016, 18:29

But GREAT LENSES!


Likelenses 24 Mar 2016, 18:26

arose23

Maybe terrible eyesight,nut GREAT lenses!


arose23 24 Mar 2016, 14:21

-13.00 and -12.00 ME and Yebra have terrible eyes. :-(


arose23 24 Mar 2016, 14:21

-13.00 and -12.00 ME and Yebra have terrible eyes. :-(


Arose 24 Mar 2016, 14:18

-13 and -12


Neal 16 Mar 2016, 08:25

Glover,

What are lateral progressives?


Likelenses 15 Mar 2016, 19:44

Yebra

So far you win the WOW award for your lenses!


Glover 15 Mar 2016, 12:24

-4.25 -.100 x 174

-3.75 -.75 x 90

with lateral progressive add of 2.50


Melyssa 14 Mar 2016, 12:54

Still the same in both eyes for a lot of many years now: -9.00 +3.00 90, add +2.50 -- carry the one, divide by zero, get a NullPointerException, ...


Yebra 14 Mar 2016, 10:13

-14.00 Right/-12.73 Left

My eyesight without glasses sucks.


SpexGuy 12 Mar 2016, 08:56

od: +3.25 +1.00 x165

os: +3.50 +1.25 x 045

add 2.00


A. P. 11 Mar 2016, 16:27

Old prescription December 2012:

OD +2.50 -.50 x10

OS +4.00 -1.00 x105

Add +2.25

New prescription March 2016:

OD +3.75 -.50 x100

OS +4.50 -.75 x110

Add +2.00 (ft 28 Trifocals)

The ECP told me it might take as long as two weeks to adjust to the distance RX increase.

No wonder I got the "corrective lenses" restriction put on my driver's license for the first time ever last month!


Corabeth 11 Mar 2016, 07:28

-5.25 both eyes


astigmaphile 10 Mar 2016, 11:26

OD +.75 +1.25 @ 20

OS 0.0 +2.50 @ 155


Phillip 10 Mar 2016, 09:55

My glasses are R: -7.25 -.1.25 x 065 L: -7.00 -1.00 x160


Jan 10 Mar 2016, 07:25

Right -2.00 x.50 x070

Left -1.75

Add 1.50


DJ 09 Mar 2016, 14:47

OD -3.25 -.50 x90

OS -3.00 -.50 x050


Cactus Jack 14 Feb 2016, 22:06

I forgot to say, "Thanks Andrew"

C.


Likelenses 14 Feb 2016, 21:20

The skit is even more interesting,and funny,for people like this community,that know,and understand vision problems,and powers of lenses.


Cactus Jack 14 Feb 2016, 17:48

astigmaphile,

I kind of doubt it. I am fairly certain that both were significantly myopic and wore similar frames. That was part of their Schtick Even with much stronger PLUS and MINUS lenses they could probably see well enough to be able to do a well planned and rehearsed sketch with blurry vision. The timing and spacing of the numerous 'sight' gags had to be just right for it to work.

Good clean comedy is no accident and they were pros. I think the fact that they were both pretty nearsighted and the audience knew that they regularly wore strong glasses, made the sketch even funnier.

C.


astigmaphile 14 Feb 2016, 15:48

I wonder if the two ronnies were doing GOC. Those glasses amount to a huge amount of hyperopia and myopia. The plus ones look like cataract spectacles.


Andrew 14 Feb 2016, 14:11

http://www.dailymotion.com/video/x9vtk4_the-two-ronnies-opticians-sketch_fun


Cactus Jack 13 Feb 2016, 18:12

Julian and Dave,

The one I am thinking of is called "The Two Ronnies - Opticians Sketch" I found it by doing a Google search. I was unable to find it on YouTube.

C.


Julian 13 Feb 2016, 14:34

Cactus - Shows featuring the two Ronnies are still screened on UKTV Gold, a comedy channel. Ronnie Barker (who died in 2005) is still shown in episodes of two sitcoms, Porridge and Open all Hours (without glasses in either); and Ronnie Corbett seems to be going strong at the age of 85, though he doesn't seem to do any shows these days.


Cactus Jack 13 Feb 2016, 12:35

Dave,

Wear your glasses full time for 2 weeks and then make a decision about when to wear them. The 2 weeks will give your brain time to get used to NOT having to correct the images and give you time to realize that what other people think about your glasses IS NOT of the least significance. The idea that you allow someone else to judge how well YOU see is total BS. It is like saying that I think your shoe size is too large and YOU should wear smaller shoes - even if it hurts.

I don't think you have mentioned where you live, but some years ago I noticed that people from the UK seemed to want the approval and permission of others (preferably the government) to see well. I came up with the idea of the Ministry of Vision to license eye wear as an April Fool joke. A surprising number of people thought it was a good idea. One member suggested that the offices should be in the same building as the Ministry of Magic. The Ministry of Vision would collect fees for licensing your vision correction, similar to licensing Radios and TVs, but we could not figure out where to post the license so others would know that the proper fees has been paid and the wearer was not cheating. It was fairly easy to require wide temples on glasses frames, so the license number could be read from a distance of 3 or 4 feet. Perhaps an impeded chip could be required in glasses frames so the license could be read electronically. Contact lenses were the real problem and we had to drop the idea. It had real appeal to those of the Bureaucratic persuasion, particularly if they could be the ones to collect and benefit from the fees. Funny how that works.

If you are form the UK, you are probably too young to remember The Two Ronnies on British TV. Both Ronnies wore MINUS glasses and they did a classic comedy skit about a visit to the Opticians. If you are interested, I will see if I can find a YouTube link.

C.


Dave 13 Feb 2016, 04:05

Thanks CactusJack.

Collected them this morning. I was expecting -1 to make almost no difference as the optician said it is almost the lowest. However, I was surprised with how sharp everything in the city was - so much writing I can now read on signs, details on buildings, etc. Did a lot of comparing with and without. And it is so easy to read signs at train station.

Feel a bit shy/self conscious with the glasses so thanks for the tips. The lenses look like proper prescription lenses, so I guess people will appreciate that I need them. So I just got to get used to been a guy in glasses! Full time/part time - I have not decided yet.

I'm 30 and work in IT. Full prescription is L -1 -0.25 80, R -1 0 0.


Cactus Jack 10 Feb 2016, 17:59

Dave,

Have you ordered / received your glasses yet?

A prescription of -1.00 in both eyes means that you have built in +1.00 reading glasses. -1.00 means that everything beyond 1 meter or 39.37 inches is increasingly blurry. If there is NO Cylinder correction in your glasses, everything inside that 1 meter radius should be clear. With the exception of driving, when you wear your glasses is up to you. There may a few who say that that prescription is not strong enough to wear full time, but frankly it is none of their business.

A couple of things you need to remember:

1. Vision occurs in the brain. Your eyes are merely biological cameras.

2. Your brain can do some amazing image processing, if it knows what something is supposed to look like, but it takes a lot of energy and effort.

3. It will take a few days for your brain to realize that with your glasses, it has a lot less work to do. You brain will probably decide that it likes you to wear your glasses.

4. You DO NOT need anyone's permission to see well.

My suggestion is to wear your glasses full time for about two weeks and then make a decision when to wear them.

You did not mention your age or occupation. It is important.

When you start wearing glasses, you may be reluctant to wear them around friends, family, or co-workers. Almost all new glasses wearers experience some anxiety about that. The only known cure is to just wear them. Expect some comments and some requests to try them on. That will only last for a day or two. After that, they may comment if you don't wear them.

You may be surprised that your friends have probably known that you needed glasses for quite some time. They have seen you struggling to read a menu board or recognize someone in the distance, but were too nice to mention it.

Please let us know your decision.

I think you are in for a wonderful surprise, at what the world looks like beyond 1 meter, particularly at night.

C.


Cactus Jack 10 Feb 2016, 17:59

Dave,

Have you ordered / received your glasses yet?

A prescription of -1.00 in both eyes means that you have built in +1.00 reading glasses. -1.00 means that everything beyond 1 meter or 39.37 inches is increasingly blurry. If there is NO Cylinder correction in your glasses, everything inside that 1 meter radius should be clear. With the exception of driving, when you wear your glasses is up to you. There may a few who say that that prescription is not strong enough to wear full time, but frankly it is none of their business.

A couple of things you need to remember:

1. Vision occurs in the brain. Your eyes are merely biological cameras.

2. Your brain can do some amazing image processing, if it knows what something is supposed to look like, but it takes a lot of energy and effort.

3. It will take a few days for your brain to realize that with your glasses, it has a lot less work to do. You brain will probably decide that it likes you to wear your glasses.

4. You DO NOT need anyone's permission to see well.

My suggestion is to wear your glasses full time for about two weeks and then make a decision when to wear them.

You did not mention your age or occupation. It is important.

When you start wearing glasses, you may be reluctant to wear them around friends, family, or co-workers. Almost all new glasses wearers experience some anxiety about that. The only known cure is to just wear them. Expect some comments and some requests to try them on. That will only last for a day or two. After that, they may comment if you don't wear them.

You may be surprised that your friends have probably known that you needed glasses for quite some time. They have seen you struggling to read a menu board or recognize someone in the distance, but were too nice to mention it.

Please let us know your decision.

I think you are in for a wonderful surprise, at what the world looks like beyond 1 meter, particularly at night.

C.


Dave 10 Feb 2016, 17:02

First prescription today: -1 in both eyes. Do people usually wear glasses full time at this prescription?


Obsessed 31 Jan 2016, 12:32

Hi Colin! You look amazing in your glasses! Beautiful! If you'd like to chat, drop me a note at viliukukas@aol.com

I'd like to ask a couple of questions about your glasses.


Trent 30 Jan 2016, 09:03

New Rx

OD -8.00, -2.25 x 012

OS -8.00, -2.25 x 163

Add: +2.25


malina 28 Jan 2016, 06:09

My prescription is:

OD -0.5

OS +0.75 / -1.00 / 81

Because of amblyopia in my left eye I patch my stronger right eye. Of course I can't always wear a patch so I wear glasses with an overcorrected right lens (+1.5) which makes my vision in this eye very blurred. So I have to use the left eye for nearly everything. I have a bilateral strabismus, that means one eye sees and the other one turns in significantly. It's one reason why I prefer a patch.

For reading, I have special glasses:

OD +1.5

OS +4.00 / -1.00 / 81

- with the right lens occluded most of the time.


Soundmanpt 27 Jan 2016, 09:27

A little fun

Somehow I get the idea your a female and your doing this to somehow impress a guy friend that must have an interest in women that wear rather strong glasses. So what prescription did you decide on for these glasses? Actually I think considering your own weak prescription you could likely tolerate something like -5.00 and it would help if you were able to order the glasses with 1.50 lens thickness. You didn't say where you ordered the glasses from but I know Zenni offers that option at no extra charge.

Of course I think we will all be interested in hearing how things go after you get your glasses and i hope yu have the fun your intending.


A little fun 26 Jan 2016, 17:14

Thanks for your responses. I ordered a pair and will let you know how they work out.


Weirdeyes 20 Jan 2016, 01:24

A little fun

If you're willing to deal with extremely blurry vision and not try to accommodate, you could wear -10.00ish glasses. I've had some fun with them.


Colin 20 Jan 2016, 00:43

A little fun.

You could try mine and just feel your way around!


Likelenses 19 Jan 2016, 22:25

A little fun

From the description of what you want to accomplish,I think that you could easily deal with -6,or -7,but you may even go for the flat front gusto,and order -9.

Do tell what you plan on doing!


A little fun 19 Jan 2016, 21:24

I have a low script R - 1 L -.5 -.5 and I want to make my lenses look a little thicker for a person of interest. How much extra "minius" could I tolerate without getting headaches / would I be better off adding a little plus (or both?)? I don't plan to drive or do anything where I have stare at a computer. I just have to be able to walk around my house and not injure myself or get dizzy.

I'm in my early 30s if that make a difference. Thanks!


Weirdeyes 19 Jan 2016, 19:34

I've been doing research on medical insurance. Apparently some vision insurance can cover costs for "medically necessary contact lenses". One of the requirements is 3D or more difference between your eyes. I believe I fit that requirement. My current prescription is R: +1.00 -0.75 L +4.25 -1.50. Do they just take a quick glance at my prescription or do they calculate the spherical equivalent? My spherical equivalent is R +0.625 L +3.50. That would make the difference between my eyes only 2.875 D.


HighMyopic 19 Jan 2016, 14:22

I am very interested to see if you have found your old glasses yet, Colin.


Colin 19 Jan 2016, 11:17

Bracesfan

http://imgur.com/veOwncG

Just for you!!


sam12744 19 Jan 2016, 09:53

Methinks the game is afoot...


Likelenses 19 Jan 2016, 00:14

Colin,High Myopic,and now bracesfan added to the mix.Matches made in heaven!


bracesfan 19 Jan 2016, 00:02

Colin

Your glasses are soooo amazing. I would love to try and wear similar pair as well...


colin 19 Jan 2016, 00:02

Your glasses are soooo amazing. I would love to try and wear similar pair as well...


HighMyopic 17 Jan 2016, 16:30

Colin, did you try looking today for the old glasses? Can i call you from the USA? I would love to talk with you on the phone.


Colin 17 Jan 2016, 16:16

Yep. Prescription will be pretty much the same.


HighMyopic 17 Jan 2016, 15:58

I sure wish i could wear those amazing glasses for my eyes. Your other older pairs that you will give me are similar to this pair?


Colin 17 Jan 2016, 15:55

High Myopic. http://imgur.com/RXD0JsW


HighMyopic 17 Jan 2016, 15:40

Colin, how heavy is your current new pair that you just got? Can i see a pic of the back of, both lenses?


Colin 17 Jan 2016, 15:26

Francois.

Would love to chat. My email.

colinbaldwinbuilders@gmail.com


HighMyopic 17 Jan 2016, 11:18

I really hope Colin is looking for the old glasses for me today on his day off work.

I hope if he can find the black pair, that i can take it to Cosco when i get it in my mailbox, and get the arm fixed so that i can wear the black pair with inch thick lenses when i am out and about. I might need a white cane though...


HighMyopic 17 Jan 2016, 09:00

Paul, whats your email? I want to chat with you about your lentictular glasses. I love collecting and wearing very strong glasses. My email is jetcoasterfan@gmail.com


Francois 17 Jan 2016, 08:02

Colin

Hi Colin..would be great to chat personally,but not sure how as we have the same eye disorder.hope to hear from you tx


paul 17 Jan 2016, 02:06

highmyopic,i wear +21.50 lenticular glasses


HighMyopic 16 Jan 2016, 15:10

Does the black pair have lenses like this pair from Gerald Lang?

http://imgur.com/CDOROlQ

Or even thicker?


HighMyopic 16 Jan 2016, 14:31

You think you know where your old glasses could be in your new house? Is the black pair like a pound in weight? Or more?


Colin 16 Jan 2016, 14:11

Sorry Francois

That last post was from me! I am still getting used to posting.

Your glasses look wonderful and very similar to mine. If I had more money I could have got a designer pair.


HighMyopic 16 Jan 2016, 14:01

You found the holy grail black pair?


Francoir.  16 Jan 2016, 14:01

Your glasses look wonderful. They look much classier than mine!

C


Colin 16 Jan 2016, 13:57

http://imgur.com/a/XVUdB

Hope this works. Pics of me!


HighMyopic 16 Jan 2016, 09:05

Francois, Whats your rx? How many pairs of glasses do you have? You live in the USA? I am still waiting for your email.


Francois 16 Jan 2016, 09:01

I sent you an email


HighMyopic 16 Jan 2016, 08:46

Francois, You want to chat with me by email? jetcoasterfan@gmail.com I would love to wear a pair of your glasses for my eyes. Whats your rx?


Francois 16 Jan 2016, 08:43

Colin these are almost identical to my new glasses.

my glasses http://imgur.com/gallery/guRHJ


HighMyopic 15 Jan 2016, 18:31

Can I see a pic of you with your glasses on? I want to see how huge your eye look behind the glasses.


Colin 15 Jan 2016, 17:56

http://imgur.com/a/b9R63


HighMyopic 15 Jan 2016, 17:47

Can you get a view looking straight down at the thickness of the lenses?


Colin 15 Jan 2016, 17:39

Also this

http://imgur.com/qunExim


Colin 15 Jan 2016, 17:22

Try this.

http://imgur.com/yhBN82z


Colin 15 Jan 2016, 17:16

I don't know if this will work but this is a link to a pic of my current glasses.

http://imgr.com/azcXMv


GLang 14 Jan 2016, 13:07

Colin

Hope to hear from you

glang@gmx.us


HighMyopic 14 Jan 2016, 10:24

You can send the pics to jetcoasterfan@gmail.com.

You can also upload them to imgur.


Colin 14 Jan 2016, 10:19

High Myopic.

Have taken some pics of my glasses but I'm not sure how to add them to this text. If someone could let me know I will do my best!!

I would rather not put my email on the post as its used for business and I don't want to be flooded with non work emails! However if you are happy to post your email I will contact you. It would be nice to chat.


HighMyopic 14 Jan 2016, 00:52

Collin whats your email? I want to chat with you about your amazing sounding glasses that i only dream to have a pair like one day to wear.


Colin 14 Jan 2016, 00:48

High Myopic.

Will take some pics of my glasses when I get back from work. The lens buttons are about 13mm thick.


HighMyopic 13 Jan 2016, 18:08

Colin, can I see pics of your glasses? How thick are the lenses? I have always wanted +30 diopter glasses to wear a lot.


Colin 13 Jan 2016, 17:22

Thought I should also post my prescription here.

Distance +31. Reading. +34

My optician says this is the highest plus prescription he has come across although he has a higher minus customer. Can anyone beat this??


Cactus Jack 12 Jan 2016, 08:01

Sam,

Sometimes people engage their mouth before engaging their brain. Was this from your regular Contact Lens fitter or someone new? Your regular Contact Lens fitter should have been aware that you had been wearing Toric Contacts successfully for a long time and knew their limitations.

C.


Sam 11 Jan 2016, 23:05

Cactus Jack

I've worn toric contacts for years without much issues. I don't know why she would call my prescription high. They sometimes get blurry and slightly uncomfortable, but they're clear and comfortable most of the time. I guess my eyes aren't particularly sensitive.


Cactus Jack 11 Jan 2016, 22:54

Sam,

Almost all Astigmatism is in the Cornea. Your Astigmatism is low for glasses and glasses with that amount of cylinder are easily made to your exact prescription. Contacts are a different matter. There are two ways to deal with Astigmatism in Contacts. If the Astigmatism is low, the simplest solution is to add 1/2 of the Cylinder to the Sphere correction and prescribe Sphere Only Contacts. Obviously, that is a compromise prescription, but it may be worth a try.

The other way is to fit Toric Contacts, but that doesn't always work very well. The problem is that contacts tend to move around on the Cornea when you blink. For Sphere Only Contacts, that is a good thing because that helps replenish the tear film between the Contact and the Cornea. For Toric Contacts, that can be a problem if the Contact also rotates, because as it rotates, the Cylinder Axis will vary and your vision will be excellent when the Axis is correct and very very blurry when it is not.

There is another minor point about Toric Contacts. They are only available in 10 degree Axis increments. Glasses are available in 1 degree increments. That is not a big problem for low Cylinder powers, but can be a problem at high Cylinder powers.

The other nice thing about Sphere only contacts is that they are a lot less expensive than Toric Contacts.

C.


Sam 11 Jan 2016, 21:27

My contact lens fitter told me I have high astigmatism. The cylinder is only 0.75 in the right eye and 1.50 in the left eye. I thought high astigmatism was 2.00 and above. Is it possible I have a lot of corneal astigmatism?


Cactus jack 08 Jan 2016, 20:11

MatthewWorth.

Hyperopia (and Myopia) is caused by a mismatch between the Total Optical Power of the eye’s lens system and the length of the eyeball. In the case of Hyperopia, the eyeballs did not grow quite enough from birth to adulthood and distant images are focusing behind the Retina. In your boyfriend’s case about 1.3 mm behind the Retina.

There are two ways to correct Hyperopia. One way is to use SOME or sometimes ALL of a person’s Accommodative power provided by the Eye’s Internal Auto-Focus system to provide the extra PLUS needed to move the focus point up to the plane of the Retina. This can occur without the individual even being aware that he/she is doing it, IF the amount of Hyperopia is relatively small. The big disadvantage to correcting Hyperopia this way is that it uses up some of a person’s Accommodation Range and that can limit the ability to focus close to read or use the computer.

A better way is to use external PLUS glasses or contacts to correct the fundamental Hyperopia and free up the available Accommodation Range for focusing close.

There is another eye condition that requires PLUS lenses to correct and that is what has confused you about + glasses. I mentioned available Accommodation Range above and that is very important, because the gradual onset of Presbyopia will untimely reduce and eliminate Accommodation. When that happens additional PLUS correction will be needed to enable close focusing.

Presbyopia actually starts in childhood, but does not typically become a problem until the mid 30s to early 40s. When it happens depends on your genetic makeup and your visual environment. People who are Hyperopic tend to need focusing help before 40 and people who are Myopic tend to need focusing help after 40, but both, along with people who don’t need distance vision correction will ultimately need focusing help.

Your visual environment can reveal the presence of Hyperopia or the onset of Presbyopia. The tiny text on Smartphones and Tablets and the need to focus close to read it has even caused teens to need bifocals and it is not unheard of for University students to need bifocals or reading glasses to help with their visual workload.

If you want to learn a bit more about the Eye and how it works, you might check out this link:

http://www.lhup.edu/~dsimanek/scenario/labman3/eye.htm

BTW, don't be too smug about not needing vision correction. Odds are that your vision is not as good as you think it is. It is very common for low Hyperopes to think their vision is a lot better than it really is.

C.


MatthewWorth 08 Jan 2016, 02:26

Hey Cactus Jack,

1. Both your ages?

We are both 25.

2. Your educational background.

I have a Bachelor's

3. Your Occupation?

Student

4. Do you wear any vision correction?

No

5. Have you studied any math or any of the sciences?

Math

6. Have you taken any Physics Courses?

No


Cactus Jack 07 Jan 2016, 20:40

MatthewWorth,

Your boyfriend has significant Hyperopia or farsighted ness or long sightedness. It is not surprising that he needs to wear glasses or contacts.

Before I try to explain Hyperopia, I need a little more information about you and your boyfriend.

1. Both your ages?

2. Your educational background.

3. Your Occupation?

4. Do you wear any vision correction?

5. Have you studied any math or any of the sciences?

6. Have you taken any Physics Courses?

Hyperopia can be a little difficult to understand and the above information will help me compose an explanation that you can get your mind around.

As a teaser, I will tell you that Hyperopia is the ONLY refractive error that you can correct internally, if it is not too great. However, the act of trying to correct significant Hyperopia and also focus to read, can make life miserable with lots of headaches and visual discomfort.

C.


MatthewWorth 07 Jan 2016, 19:41

Hi,

My boyfriend has glasses and I just wanted to get a better understanding on his prescription. He has a + prescription which I always understood to be for reading but he wears glasses/contacts all the time and can't see far or near without them.

This is his prescription:

OD, +3.25, -0.50, 150

OS +3.75

Will someone please explain to me his prescription.

Thanks!!


Galileo 07 Jan 2016, 00:05

Thanks Apple77


Apple77 05 Jan 2016, 07:37

Galileo,

I think 500 degrees means -5.00, 450 degrees is -4.50, and so forth.

-Apple


Galileo 05 Jan 2016, 05:28

I have a question;

I watched a Singapore news item a couple of days ago where they were investigating optical myths and getting different advice from different opticians. The reporters interviewed people on the street and one of the questions was "how bad is your eyesight".

Everyone answered that question with something like "500 degrees", "400 degrees" or "550 degrees". No one mentioned dioptres and everyone interviewed was a myope.

Can anyone enlighten me as to what this measure is and how it relates to prescription strength?

Thanks in anticipation.


Galileo 05 Jan 2016, 05:26

I have a question;

I watched a Singapore news item a couple of days ago where they were investigating optical myths and getting different advice from different opticians. The reporters interviewed people on the street and one of the questions was "how bad is your eyesight".

Everyone answered that question with something like "500 degrees", "400 degrees" or "550 degrees". No one mentioned dioptres and everyone interviewed was a myope.

Can anyone enlighten me as to what this measure is and how it relates to prescription strength?

Thanks in anticipation.


Patrick B 05 Jan 2016, 00:06

Ric -- To each his own, but I have had lenticular/myodisc lenses for quite some time and like the negative carriers for two very good reasons: First, they are cosmetically more appealing when viewed head on because there is very little cosmetic difference between the bowl and the carrier since both are negative; second, I really hated the massive difference between the bowl and the carrier if my eyes ever strayed outside of the bowl. The difference is so great because of the vast difference between the negative prescription in the bowl and the plus prescription in the carrier. I always felt that things were being pulled into my line of vision from the plus carrier which was really distracting. I also think going biconcave is the better choice because I get somewhat better vision with biconcave lenses. Apparently it's because the focal point is a bit closer to one's eyes.

To summarize, I think the blended myodiscs with the negative carriers provide a two distinct advantages: better visual acuity, and better cosmetics.The downside is that the edges will be thicker.

Let us know what you end up doing. You probably should consult with an eye care professional who is familiar with dispensing extremely high minus prescriptions.

Best in the New Year!


Ric 04 Jan 2016, 11:46

I think i should try with lenses with plano front and plus carrier, like the lentilux or so. Prescription is -17 and -3.5 cyl in worst eye and -15.50 with -3.25 cyl for left eye. Does plus carrier hide better the rings?


Patrick B 04 Jan 2016, 09:33

Ric -- My prescription is stronger than yours (-26/-25) and I always get my glasses through Optical4Less. Their frame selection is adequate, but they do good work and their prices are great: Blended lenticular/myodisc lenses (glass) for $238 US plus frame. You can specify if you want a plus or a minus carrier, the size of the bowl, and whether you want plano or bi-concave lenses. Their myodisc lenses start at -20 but they might do them as a special order. Check them out and look for their section on lenses. Good luck and let us know how you make out.


Ric 04 Jan 2016, 04:03

Likelenses: do you know where could i get the blended lenticulars in reasonable price?


Likelenses 01 Jan 2016, 00:32

Melyssa

You could get them in your Rx. Cheryl's Rx is slightly stronger in sphere,but negligible in cylinder,and we found a local lab in Ohio that made them up for her.


Guido 31 Dec 2015, 17:11

CJ, thanks for the reassurance. Thats what I came up with.


Melyssa 31 Dec 2015, 13:19

Likelenses,

For one thing, I'm not sure that my RX is strong enough for myodiscs, and for another, like when people have suggested my getting bifocals in at least one pair of my collection, there's that $$$ thing to consider -- especially with wearing each pair for just a few hours each week. Either way, I'm okay with the good old CR39 lenses.


Cactus Jack 31 Dec 2015, 11:26

Guido,

I think your Mono Vision idea has merit and it is certainly worth a low cost try.

Your current prescription is:

OD -4.75,-0.75 31, Add 2.25

OS -4.75, -1.00, 48, Add 2.25.

PD 66 (Note there are typically 2 numbers for PD in a bifocal prescription for Distance and Near PD. Something like 66/63 because of reading convergence.

Mono Vision glasses would be:

OD -2.50,-0.75 31 (Close(

OS -3.25, -1.00, 48 (Intermediate)

PD 63

Assuming "arms length" is about 75 cm or 30 inches Using those distances you actually get an "add" of +1.33 diopters. I used +1.50. It would be best to use actually measured distance to the display. The basic formula for lens power vs, I focus distance is:

Lens Power in diopters = 1 meter (100 cm, 1000 mm, or 39.77 inches) / Focus Distance (in matching units of measure)

I hope this helps. You might consider an Anti-Reflective coating, but you probably don't need any other options.

I have a couple of other ideas if the Mono Vision glasses are not satisfactory.

C.


Cactus Jack 31 Dec 2015, 10:58

Roy,

Welcome to one of the "joys" of needing prism.correction. If the "sweet spot" in each lens is not where you are looking, it is a pretty good clue that the Optical Center of the lens IS NOT coincident with your Central Axis of Vision.

PD is supposed to be measured with the eyes looking straight ahead with the Central Axes of Vision of each eye, parallel. That works just fine if there is no prism involved The location is loosely related to your PD because most PD measurements start with each eye looking straight ahead and are adjusted from there for prism. It is not always easy to do. Pure prisms have no Optical Center, but the Sphere and Cylinder components of the lenses do. One of the tricks used by some Dispensing Opticians is to mark the apparent eye position on the glasses and measure that.

The difficulty in getting glasses with high or complex prism components right is one of the reasons glasses with prism correction are so expensive. The Dispensing Opticians expect to have to remake the glasses several times to get them optically as acceptable as possible.

One of the problems with glasses with a lot of prism is the how the lenses are typically mounted in the frame. Ideally, the Central Asix of Vision should impinge (strike) the back surface of the corrective lens at 90 degrees. Any angle other than 90 degrees will introduce some distortion. If the eyes turn inward, the lenses should be mounted where most of the outside edge thickness is on the front side of the frame. However, that makes the glasses look "funny". Typically, Base Out prism lenses are mounted with most of the outer edge thickness behind the frame, which exacerbates the problems.

Maybe this will help you understand the problem. You might be able to get the glasses vendor to remake your glasses, but they may never provide the best corrected vision possible for the reasons stated above. The optical physics involved just won;t let it happen.

I have been dealing with this problem for years. Fortunately, I don;t have any vertical prism, but substantially more BO prism than you have. As I have said before, trying to understand the problems with prism caused me to delve deeply into optics and vision. I have also experienced other "interesting" optical phenomena related to wearing prism glasses that still have me scratching my head.

C.


Guido 31 Dec 2015, 08:43

Probably a Cactus Jack question. Current Prescription, OD -4.75,-0.75 31, Add 2.25; OS -4.75, -1.00, 48, Add 2.25. PD 66, Date of script 22Oct2015. I work for a CPA during the tax season commencing Jan. 15. I went to the optometric office that did my refraction to see if the optician could do what I wanted. He said not without seeing the Dr. Time prohibits. What I would like to do is to have a mono-vision pair of glasses to be able to read source documents close up, and then enter said info into a computer program. As my right eye is dominant, I would guess that something close to a single vision reading script would be appropriate to my right eye i.e. -2.50, -0.75, 31. What would seem to be an appropriate script for my left eye at arms length? Is an adjustment of the PD indicated? I had a pair of specs that I used like this in the past, but the script became so outdated that they have become pretty unusable. If someone knowledgeable about such things could give me some guidance, I could do one of the mail order glasses places on the cheap. I understand the inherent risk, and am willing to absorb. coastal.com has some pretty cheap frame choices. If further information is required, please ask, as I pretty much check the board regularly


Roy 31 Dec 2015, 06:50

I have a new prescription, which is giving me a small problem. Myopia is reducing but prism is increasing. Prescription is:-

Right Eye:- -1.75, -1.00 @ 88 degrees. Prism 3.00 down 11.00 out

Left Eye:- -4.5, -0.50 @ 85 degrees. Prism 2.00 up 11.00 out

Near Add: 3.00

Intermediate add 2.00

I have had two pairs of glasses made (at a cost of around £800, of which £650 is for the two pairs of lenses) to the new prescription. One is a normal pair of progressives and the other is progressives but with intermediate at the top and near at the bottom (for computer use).

I am happy with the standard progressives but the vision, when using a computer, seems slightly blurred with the computer glasses, even at the optimum viewing distance. Shutting one or other eye gives the same slight blur in each eye and turning my head gives best vision when looking more or less straight ahead, so I guess the PD must be about right. If I remove my glasses, shut one eye, and adjust my viewing distance to suit my myopia, vision is clearer, even though I then have no cylinder correction.

The glasses are both 1.60 index plastic (with an outer edge thickness of 11-13mm). I did notice the dispensing optician measured my PD with me wearing my old glasses (10 base out in both eyes). Could this be the problem in giving a small PD error or is this problem of slight loss of clarity inherent in glasses with high prism values? I have also noticed that the problem mainly appears when using a desktop, and a laptop is much better, but the desktop is sharp when I remove my glasses. Can anyone help please?


Likelenses 30 Dec 2015, 22:08

Melyssa

I think with your awesome collection of eyewaare that one pair of myos would be nice.

My girlfriend was appalled,but at the same time obsessed when she first saw someone in myos.

It took a bit of convincing but she gleefully got a pair in her minus nineish Rx.She enjoys the attention that she gets with them on,of course she also realizes that her Rx does not really require them.

Some our mutual guy friends must be OO,as she gets a lot more attention from them when wearing the myos.

When we started dating,she was kind of shy about her strong Rx,but she has really come out of her shell,and has become very interested in vision,glasses,and loves asking about these things.However on occasion she thinks that I am overly interested in glasses,and girls wearing them.


Ric 30 Dec 2015, 01:30

Im feel better with my last glasses since i ve got glass 1.9 lenses in a small frame. Optician does not recomended me the myodisc type, but she said the blended lenticular could hide the rings better.


Melyssa 29 Dec 2015, 12:40

And I won't deal with myodiscs either.


Sarah 29 Dec 2015, 11:21

Likelenses,

Maybe to some, but not to me.

~Sarah


Likelenses 28 Dec 2015, 15:54

Sarah

Myos are very sexy looking though.


Sarah 28 Dec 2015, 10:17

Likelenses,

I would like to stay away from myodiscs as long as possible.

~Sarah


Likelenses 27 Dec 2015, 20:58

Sarah You could also talk to your optometrist about going into myodiscs early if you have another large increase in your Rx.

My minus nineish girlfriend has a pair of myos in her Rx,and loves the vision she has with them.They took a bit of getting used to but she loves wearing them,and she looks fabulous in them.


Sarah 27 Dec 2015, 17:35

Likelenses,

Oh, okay. I'll look into them.

~Sarah


Likelenses 27 Dec 2015, 17:22

Sarah

They are lenses that have a curvature formed into both the front,and back surfaces,that is negative.

They offer superior vision when the prescription is high.The only other option to give this type of vision would be a myodisc lense.

They are usually prescribed at a point when the Rx reaches -14 or so,but many optometrists well give them earlier as they take a bit to get used to,so by the time their patient requires them they are comfortable in them.

Here is a video showing a pair of bioconcave.

https://www.youtube.com/watch?v=Zbw-_lGDdjM


Sarah 27 Dec 2015, 07:55

Thank for all the informationnand tips.

Likelenses,

What are biconcave lenses?

I read at good distances!

Puffin,

My parents are farsighted due to age, so they wear readers. My brother is stabslized at -1, one sister is at about -4/-5. Other than us we have one farsighted cousin and 8ne myopic cousin,who basically has perfect vision, and that is all (out of all my) cousins.

Antonio,

I dont read in bed unless it is a text.

~Sarah


antonio 27 Dec 2015, 04:00

Hi Sarah

and always read in good light Sarah, and better in the morning than in the evening, never read in bed,

and rest your eyes for 5 minutes looking out of the window after reading for 30 minutes, Never read nearer than 30 cm away. And expose your eyes to daylight quite often, that helps too, it may help you to read books in old glasses about an diopter or 1.5 or two less than you need for longer reading. If you put your current ones on after that, you get the HD effect of new glasses for seeing far which is a good sign for your sight,

and read the computer making script bigger with Strg ++

(Strg or Ctrl -- makes it smaller again).

So avoid to read small print for longer times!

best regards antonio


Puffin 27 Dec 2015, 02:51

Sarah, do either of your parents or close relatives wear glasses? That could give you some clues to your situation.


Likelenses 27 Dec 2015, 00:16

Sarah

An additional thing,You may be able to slow your lense increases a bit,by paying close attention to your reading distances.

With glasses on you should never read a book,of printed material closer than 12 inches,and never closer to a computer monitor than 20 inches,This may seem difficult at first,as letters may appear to be too small.

What is your present reading distance?


Likelenses 27 Dec 2015, 00:08

Sarah

I agree with Guest,and Soundmanpt,that you are very likely to reach -17,to -19.

In preparation you may want to ask your optician if they think you could benefit wearing bioconcave lenses now,as it is certain you will need then in the near future.Since they take a bit getting used to,it will be easier with a weaker Rx.


Sarah 26 Dec 2015, 13:03

Soundmanpt,

Maybe, its just that I heard that some people's eyes never stabalize and I was getting scared that I would end up like that.

~Sarah


Soundmanpt 26 Dec 2015, 12:58

Sarah

It could be that you had a growth spurt. Now that doesn't mean you grew any taller but you may have had a change in your body in other places if you know what I mean. Also college could be a major cause for a bigger increase. Many college students don't get their first glasses until they are in college. I bet if you look you will find that there are quite few optical stores close by your campus. There's a reason they are that close.

Also when your eyes begin to slow down is hard to say. To be honest 18 is really on the early side.


Sarah 26 Dec 2015, 12:22

Soundmanpt,

I know they are just guesses. The main thing is I am just a bit worried because I thought my increases were supposed to be slowing down now that I am close to 20, but they are doing the opposite. Like I said earlier my last increase was the largest I have ever had.

~Sarah


Soundmanpt 26 Dec 2015, 11:56

Sarah

Predicting what your prescription might be by the time your eyes become stable is really impossible and even your optometrist if you were to ask him or her would tell you that they have no idea and they of course are looking and checking your eyes directly. So as long as you understand that whatever anyone in here tells you it is only a guess. But you have supplied some useful information by providing your past 3 yearly prescriptions. But even that can change of course. You may notice that your SPH numbers have really increased at about one diopter per year. Your astigmatisms has changed at about -.50 per year. So the now the real question is when will your eyes start to slow down on their way to becoming stable? This is very hard to say because no one is the same. Generally speaking most stop in their early twenties to mid twenties. Also i'm sure the added strain of college work enters into the picture as well. Once your out of college your increases could even be less each year. Personally I think that your not going to get to the -17.00 or or -19.00 numbers.


Sarah 26 Dec 2015, 08:28

Guest,

Wow, so close to the 20s, but i have to agree with this one more than the previous one

~Sarah


guest 26 Dec 2015, 06:18

Hi Sarah

In the light of the answer you gave to P's question; I revise my estimate to the -17 to -19 range with astig a bit of an increase. I did not know you were 18, thought in early 20's.

I had a g/f who stabilized there after going to College. She got best vision from biconcave lenses and proudly wore them. She had special toric contacts, but was content with here corrected vision with glasses to about 20/30 and could drive. By the way, she is now in here fifties and has a normal life lol. Her kids are not as nearsighted as she was. She got them OrthoK lenses in grade school. She never went to myo's.

Figured you would want to know these facts.


guest 26 Dec 2015, 06:18

Hi Sarah

In the light of the answer you gave to P's question; I revise my estimate to the -17 to -19 range with astig a bit of an increase. I did not know you were 18, thought in early 20's.

I had a g/f who stabilized there after going to College. She got best vision from biconcave lenses and proudly wore them. She had special toric contacts, but was content with here corrected vision with glasses to about 20/30 and could drive. By the way, she is now in here fifties and has a normal life lol. Her kids are not as nearsighted as she was. She got them OrthoK lenses in grade school. She never went to myo's.

Figured you would want to know these facts.


Sarah 25 Dec 2015, 21:24

Pseldonymov,

I got my first glasses at 7 , but did not start wearing them until 9. Also, I know for a fact I needed them at 6, and am fairly certain I needed them when I was 5, cause I remember walking around the room to see the board sometimes in kindergarten cause I could not make it out from where I was sitting. I was never told my first prescription, or any until I was 16 (even then I had to sneak a peek at my file while the optician walked away for something) then my sephere was -8 in both eyes and my astigmatism was -1.5 and -1.75 for my right and left eyes, respectively. At 17 my prescription was sephere -9.25 and -9.75 and cylinder of -2 and -2.5 again they are right then left. And now at 18 my prescriptiom is sephere: -11.25 and -12.00 and my cylinder is -3.00 and -3.75. So in three years my prescription has changed sephere: -3.25 and -4 and my cylinder -1.5 and -2.00.

~Sarah


Pseldonymov 25 Dec 2015, 19:47

to Sarah

Also, another factor: when (what age) did you start wearing glasses and what was your first prescription?

What was difference between currect and previous prescriptions? How many years ago was your previous eye exam?


Sarah 25 Dec 2015, 19:05

Seems reasonable, thanks!

~Sarah


 25 Dec 2015, 17:33

That is ok Sarah, I am old and crotchety, have 5 college degrees and do not use any of them. I am a professional fisherman and have been all my life.

I do not know 2% of the acronyms used on the internet.

Actually, it makes you a better person if you do not know or use them and I received that information from the internet.


Sarah 25 Dec 2015, 17:30

Guest,

In my defense I always type everthing out.

~Sarah


guest 25 Dec 2015, 17:00

omg Sarah... to a brilliant college student not knowing internet language, shame.... and I'm over 50 lol !

IMHO... In My Humble Opinion... OK?

:)


guest 25 Dec 2015, 17:00

omg Sarah... to a brilliant college student not knowing internet language, shame.... and I'm over 50 lol !

IMHO... In My Humble Opinion... OK?

:)


Sarah 25 Dec 2015, 15:59

Guest,

IMHO?

~Sarah


guest 25 Dec 2015, 15:47

Sarah...

So IMHO I would say you will stabilize around -15 with more astig.. Due to College curriculum.

Areds2 are over the counter in usa.

Where are you?

Happy Day..


guest 25 Dec 2015, 15:47

Sarah...

So IMHO I would say you will stabilize around -15 with more astig.. Due to College curriculum.

Areds2 are over the counter in usa.

Where are you?

Happy Day..


Sarah 25 Dec 2015, 11:44

Guest,

I am a college student, which does not leave much time for anything else.

~Sarah


Sarah 25 Dec 2015, 11:44

Guest,

I am a college student, which does not leave much time for anything else.

~Sarah


guest 25 Dec 2015, 09:39

Hi Sarah..

Stabilized early 20's here.

What is your "visual habits"...examples-school, college, work (computers?) and lifestyle - indoor or outdoor (soccer mom etc) That has much to do with when you may, and I mean may, stabilize.

Merry xmas


Ric 25 Dec 2015, 07:54

Sarah: main changes stopped in mu 30 s before , just had small changes


Sarah 25 Dec 2015, 07:46

Ric,

Thanks for sharing. Do you remember when you became stable?

~Sarah


Ric 25 Dec 2015, 02:10

Sarah: yes, my eyesight is stable, not changing time ago. Finally got -15.50 for right eye and -17 for left. (have also astigmatism in both)


Sarah 24 Dec 2015, 05:13

Ric,

Kind of close to mine. What is your current prescription, if you don't mind me asking? Also, are your eyes stable?

~Sarah


ric 24 Dec 2015, 00:58

Sarah, im in double digits many years ago. Got -10 diopters when i was 19 years old


Sarah 23 Dec 2015, 15:09

Hi, all! I was just wondering if anyone else in here has a prescription on the double digits. I just received my first double digit prescription, and am very nervous about it and would love to hear other people's experiences.

By the way my prescription is:

O.D. -11.25/ -3.00/005

O.S. -12.00/ -3.75/ 165

Also, my vision is still by no means stable nor is it beginning stabilization. This was the biggest jump I have ever had, which is also a factor of my nervousness about this prescription/ my eyesight.

~Sarah


Cactus Jack 23 Dec 2015, 07:20

GreginColo,

Glad to help.

I am a bit surprised at the number of people who have had Lasik or other refractive surgery to correct Myopia and then have 2nd thoughts about it. Several members have tried to Induce some Myopia, but unfortunately seem to have no or very limited success. Part of the lack of success is genetic. Your genes that control eyeball growth have said "no more". At that point, the only thing you can do is hope to induce some Pseudo Myopia, which only involves your Ciliary Muscles and Crystalline Lenses.

If you get into a fight with your genes, guess who will win. Your genes have the ultimate power in what happens in your body.

C.


GreginColo 22 Dec 2015, 20:36

Thanks CJ and DS for your explanation of the middle 2 numbers in my recent Rx. I guessed they had something to do with astigmatism, but your explanation helps. Thanks to each of you for your time to explain.


DS 22 Dec 2015, 12:25

Greg,

Yes, the middle sets of numbers describe the astigmatism.

The numbers represent a power and an axis. The power is a relative difference to the sphere. The axis describes the orientation of the power difference.

As an example, for your right eye:

+0.50 -0.25 x 050 add +2.25

You have +0.50D lens power at the axis angle (50 degrees) and +0.25D (sum +0.50 and -0.25) 90 degrees away at 140 degrees.

All this "axis" really means is that the lens must aligned with this rotation in order to neutralize the error in the eye. You can see this in your left-eye lens where your astigmatism is -1.50D. As you rotate your lens you can see objects get stretched out differently with lens rotation (and with your left eye see the image become sharper and blurrier).

I like to think of astigmatism like a soda can. The can is "plano" on one axis (no curve / "power"), and has about base 17 curvature on the axis 90 degrees away to form the cylinder.

If the prescription is, say, 0.00 -5.00 x 90, then this is like a can standing up, as to not spill if it was opened.

If the prescription is 0.00 -5.00 x 180, then the can is laying on its side, ready to roll. For comparison, a prescription without astigmatism would be spherical like a ball rather than like a cylinder.

You will often see the shape of an astigmatic eye compared to a football. A football is much like the can analogy, but instead of having no curve on one axis, both perpendicular meridians have curvature, it is just that they are different.

This is still a bit simplified as for a lens we are talking about "power". This refractive power is created by the difference in curvature of the front and back surfaces. Cans and footballs describe a surface, but it is convenient for visualization.


Cactus Jack 22 Dec 2015, 09:29

GreginColo,

The middle two numbers are Cylinder and Axis (they ALWAYS go together). Cylinder and associated Axis, correct Astigmatism, which is typically caused by uneven curvature of your Cornea.

In your prescription,

Rt +0.50, -0.25, 050, +2.25

Lt +0.75, -1.50, 170, +2.25

the -0.25 in your Rt eye is not a large factor in your overall vision, but the -1.50 in your Lt eye is significant. However, there really is no such thing as insignificant Astigmatism. Astigmatism affects your ability to resolve small objects or small text. Any uncorrected amount causes excess fatigue because your brain will try to correct it, but it has no tools to work with as does with Hyperopia, before Presbyopia prevents that.

The Axis number is simply the orientation of the Cylinder correction in Angular Degrees. By tradition 0 and 180 degrees are with the long axis of the Cylinder horizontal. The numbers increase in a counter clockwise direction, looking at the patient, to 90 degrees, vertical and on around to 180 degrees. There is no need for the Axis number to exceed 180 degrees. Some ECPs use 0 to 179, others use 1 to 180.


GreginColo 21 Dec 2015, 20:49

While I continue to wish to regain some of my pre-lasic myopia that hasn't happened, so the result of my eye exam

today is as follows;

Rt +0.50, -0.25, 050, +2.25

Lt +0.75, -1.50, 170, +2.25

While I understand the first number (sphere) and the last number (add), not sure of the meaning of the set middle numbers (cylinder and axis, in that order). I presume it has something to with astigmatism, but if someone can help me decipher the middle 2 numbers that would be appreciated. They didn't give me the Rx printout until the checkout desk, so I didn't have a chance to ask the Dr about the middle 2 numbers. Thanks.


astigmaphile 10 Nov 2015, 12:14

The first place that I got my glasses after my cataract surgery in 2011 wanted more money because my cylinder correction was higher than two diopters.


Melyssa 10 Nov 2015, 05:38

Galileo,

That could explain why I have seen eyewear ads, either in print or in stores themselves, stating that prices are for prescriptions in the -4.00 to +4.00 range (sometimes -6.00 to +6.00).

There's that infamous three-word caveat (no, not "Made in China") -- "Some restrictions apply."


Galileo 09 Nov 2015, 15:53

Melyssa/Clair/Soundmanpt 20 years ago I used to work with a UK optical chain and their statistics were that 90% of all prescriptions were between -4 and +4 so any lenses outside that range were ordered in. Mind boggling to think that any really complex lenses - like a bifocal above -10 - were special ordered and air freighted from California to the UK. The good old days.


Melyssa 09 Nov 2015, 06:03

Claire,

What you have experienced is nothing new. Where I purchased my first drop-temples in 1984, and many glasses thereafter, my glasses always took a week instead of an hour, due to my now -9.00 prescription (-7.00 or so back then), along with the astigmatism correction. Now instead of an hour, it may be 2-3 days as they have to order the lenses -- in fact, they do that for anyone whose prescription is -4.00 or or stronger (possibly for +4.00 or stronger on that side).

The large sky-blue top-temples and my Liz Claiborne clear trapezoid-shaped frames from the 1980s took an hour, but that was at the late, lamented Eyelab, eventually bought out by Pearle.

And long ago, pre-drop-temples, at whatever family-owned optical store my parents and I used, my glasses would take 1-2 weeks. Technology may have improved since then. :)


Soundmanpt 08 Nov 2015, 18:07

Claire

To be honest there is a much higher percentage of people wearing glasses with less than-4.00 prescriptions than there is above that. It just makes sense that they are going to cater to the larger percent of people. I don't think most people expect to be able to get their glasses the same day even let alone in an hours time anymore. Most places will tell even those with even a much weaker prescription of say -1.50 that their glasses will be ready in about week to 10 days. I think the only people that need to take advantage of the places that will have glasses ready in about an hour are the people that only have one pair of glasses and they break or lose them and they need feel like they need them. Remember even with just a -1.50 prescription that person still feels like they need their glasses as much as you need yours. Also the ones that for some crazy reason only wears contacts and has never bothered even getting glasses until they have an issue with their contacts and they aren't able to wear them. Now they too have to have glasses as fast as possible just to survive, because they quickly find that they can't see to drive without correction. Those one hour places are well aware of these people and they know how desperate they are to get glasses that they are more than willing to pay 2 - 4 times more than what glasses are worth just so they can see again. The world is all about supply and demand. And I hate to tell you but they just don't feel like there is nearly enough business to take up extra space for higher prescription lenses to make it worth their while to stock them.


Claire 08 Nov 2015, 12:20

Yes they said upto -4.00 does most people and people that need driving glasses they can do in a hour. But if -6.00 is a normal prescription why don't they stock them. I thought my prescription was really bad but they see it all the time and higher. So would you say mine is very bad or normal? What would be are rage prescription lee than -4.00? I can't see glasses and need them all time


Soundmanpt 08 Nov 2015, 11:54

Claire

The problem is when you say they only stock lenses up to -4.00, but your forgetting that they probably also have them made up with most all of the options to correct astigmatisms. Now your really adding in a much larger number of lenses even with only going to -4.00. Also they probably need to keep at least some of the options with and without AR coating. And forget they now have several options of AR coating as well. In fact this is why most of the optical stores stopped years ago having in house labs because they had to stock so many variations of lenses as well as pay a lab person. I live near very big city with several hundred optical shops but as far as I know only company has labs in all their stores. Most send out for the lenses to be made up.


Claire 08 Nov 2015, 11:34

I've just had my eye test and need to get new glasses but have to wait 2 weeks for them because they don't stock the lenses. I'm shortsighted -6.00 really bad. They make most glasses within 1 hour but only stock up to -4.00 lenses. My prescription is very normal so why don't they stock all the lenses? This is a big opticians store. When you order new prescription you don't really want to wait right?


Progressive man 19 Oct 2015, 19:28

I'm 41 and the last few months have noticed small print getting difficult to read. I've been a glasses wearer (part-time for 20+ years) slightly nearsighted (-0.50 each eye) with a moderate astigmatism (-1.75 & -1.50). Today I got my eyes checked for the first time since '07 and when the doc put the small card in front of me I couldn't read the first 2 lines he asked me to read (I could barely tell they were even letters). He then prescribed me an add of +1.50. I ordered the progressive lenses in a nice Oakley frame. Any advice on what to expect from progressives? How much of a difference should I expect with the add? I've heard progressives could be a tough adjustment for a first time wearer. Doc also ordered me some mono vision contacts and said they work for about 60% of people but he wasn't that optimistic they would work in my script ( thus the trial pair). Anyone with experience with progressives or mono vision contacts please post any hints that could be helpful. I should get the glasses Saturday, thanks.


Sandy 16 Oct 2015, 04:01

Likelenses,

I must apologize for the confusion. What I meant was, given such unsual add of +2.00 in one eye and +3.00 in the other in my new glasses made reading much better and my eyes relaxed for close work, but distance vision was poor as I was unable to focus for distance. I returned to the ophthalmologists but was dissatisfied with the response given. I wanted a second opinion, and went to another specialist and was given the foll: RX: R -2.75/-0.25 ×70 L -3.25 Add +3.5 which is similar to my old rx. but the add is quite different, given that my old rx has an add of +2.00. I thought this +3.5 add, is a large increase from what I had, not knowing what the numbers represented for the Add or how they are calculated in the script. I hope this helps. I am still awaiting the updated glasses. Any changes to expect with the Add section?


Cactus Jack 12 Oct 2015, 21:23

Tracy,

Don't worry if they don't want to give you your PD measurements. It is not hard to measure your PD. The easiest is with a bathroom mirrored a ruler calibrated in mm. We can tell you how or most online retailers have instructions on their website.

C.


Likelenses 12 Oct 2015, 20:42

Tracy

In addition to what Soundmanpt has said,may I suggest that you stop by the place where you purchased your glasses,and ask for a copy of your prescription ,to include your PD measurement.

By law they have to give it to you,however they may balk at giving the PD,as they know you need it to purchase online glasses.

Tell them that you want that information in case you lose your glasses while traveling.


Likelenses 12 Oct 2015, 20:26

Sandy

You kind of lost me in that in your first sentence you said that the add is fine,but later you said that you are getting a lot more of it,and hope that it will help.


Soundmanpt 12 Oct 2015, 18:03

Tracy

I can't comment on the other on line retailers but I can tell you that over the past 11 years or so I have purchased several hundred pairs of glasses from Zenni. I am a volunteer with a non profit vision group that helps low income people get eye exams and glasses. Not only myself but others from our group have also used Zenni and none of us have ever had any problem with the glasses we received from Zenni. I think with any product your always going to find a bad review from someone. My guess is that any of the actual bad reviews were patient errors meaning they didn't fill in their prescription properly. For example it makes a world of difference if you put a plus sign instead of a minus sign in front of the numbers.

All progressives have the 3 areas in them. The upper segment is for your distance for things such as driving are watching a sporting event or concert. The middle section is called the intermediate area and is works well for short distances such as seeing your monitor a 18" to 24" away from your eyes. And of course the add segment is for close up things such as reading a book. If you had gotten lined bifocals you would not have that mid section.

I'm not sure how much your insurance paid but yes what you were left to pay seems on the extreme high side. But if you went to a high end store such as Lenscrafters that is probably about right. By the way just so you know, all the extras that they optician sells you is what he or she gets the biggest commission on. The actual base price of your glasses they get very little for. Trust me I am sure once you get a pair of glasses on line from most any of the better ones you won't ever buy glasses again from where you did this time. Remeber many of the on line places have a decent return policy. In Zenni's case if for nay reason even if you don't like the color of the frame you can return them with no questions asked and get 50% of the cost back. No it's nit all of your money but I think it's more than worth taking the risk considering how much you will save if your happy with the product. Don't you think? But I am actually happy that your getting your first glasses from a local shop. That way if you decide to give any of the on line places a try you will already have glasses to go by for a good measurement so they fit your face nicely.


Tracy 12 Oct 2015, 17:22

I forgot to mention lenses have three areas, top for distance. Middle for computer I guess. And bottom for reading, which is why they suggested trivex.


Tracy 12 Oct 2015, 15:59

Yes, I have been getting a lot of headaches and yes, fuzziness is worse the latter part of the day. I wore glasses when young and stopped due to teasing / school. Several years later tried them again and thought I was able to manage pretty well without them, I also just felt ugly with them on..I was very self conscious about glasses; it's likely my own doing my eyes are much worse (being forty hasn't helped either). I went to many stores and had trouble finding the smaller lens width I needed, not much selection. I ended up at eyetique, got a pair of Oliver peoples Riley r in cocobolo color. I have insurance and they were still $589 with insurance. Convinced me to get trivex lenses with premium ar... Yes, I am sure I paid too much (after research) but they said would be really difficult to get used to and better lenses would help. Now I realize you post more for designer, and after I found warby parker but reviews on this one as well as others, zenni, frames direct, etc. Didn't all have fab reviews. I need prescription sunglasses still and unsure wear to go. I just hope people are decent to me on how they look. I did like the Oliver peoples frames...


Soundmanpt 12 Oct 2015, 09:34

Tracy

I agree with both your optometrist and "Cactus Jack" you do need to be wearing glasses. "Cactus Jack" described very well what the numbers in your prescription mean and how those numbers effect your eyesight. You didn't mention anything about headaches and I would think with the amount of astigmatism correction you need that you would get frequent headaches? Also the type of job you do and lots of highway driving your eyes should make you feel quite tired by late afternoon. You will be surprised how much wearing your glasses will relax your eyes once you get them and your eyes adjust to them.

Yes progressives are very expensive if purchased at your local optical shop. Several hundred dollars at least. But what "Cactus Jack" was referring to was suggesting you might want to get your glasses on line. Like he said you may have already ordered your glasses and that's fine since these are your first glasses. Once you have glasses then you will know what size fits your face best since you will have a pair to go by for measurements. The place I highly recommend is Zenni (zennioptical.com) you shouldn't have any problem picking out progressives for between $55.00 and $75.00 and that is for a complete pair of very good quality glasses including your prescription lenses and even an AR coating (anti-reflective) The AR coating is very nice to have and since your likely going to be wearing your glasses full time even better. Oh and by the way they have somewhere near 1,000 to pick from so considerably more than your local shop will have. One thing since you spend a lot of time driving and your going to be wearing your glasses for driving your going to find that your non prescription sunglasses don't work so well anymore and you may want to invest in a nice pair of prescription sunglasses. For driving and just being outside you don't really need the add for seeing things close up so you can get single vision sunglasses and those you can get for under $20.00 at Zenni.

Let us know once you get your glasses and start wearing them.


Sandy 12 Oct 2015, 06:10

Likelenses,

I got my new glasses. The Add is fine as I can see to read well with the glasses but cannot focus in the distance with or without same. I went to another specialist and explained the problem I am having and was given a similar RX to the one I had before but with more add. I was told that it will take a longer time to prepare the new glasses because of the high Add. I have to pay for a new set of lenses but am hoping this works. Am using the old pair until. I just cant see clearly to read,type or write as I get headache and nausea from even typing this message. I do hope the new RX will make reading etc. a whole lot better.


Cactus Jack 12 Oct 2015, 00:15

Tracy,

Yes, progressives can be pricey. Have you ordered glasses yet? We may be able to offer some suggestions about ways to save money if you are interested. If not on these glasses, perhaps on future glasses.

C.


Tracy 11 Oct 2015, 19:39

Thanks for the quick reply. I'm 40 and in sales, use a computer and do a lot of highway driving.. Guess vision just gets worse with age. I asked the doctor if lasik would correct and he said he wouldn't recommend? Progressives are certainly pricey! Again, thanks for your input.

Tracy


Cactus Jack 11 Oct 2015, 19:22

Tracy,

Your prescription is for low Hyperopia as indicated by the PLUS Sphere. That means that you are Far or Long Sighted. Hyperopia is the ONLY type of refractive error that you can correct internally using your eye's internal autofocus mechanism, often without your even being aware that you are doing it. You did not mention your age or what prompted you to get an eye exam, but I suspect that because of the ADD, Presbyopia is creeping up on your, as it does almost everyone.

The thing that is potentially causing you the most problems is Astigmatism, which is indicated by the 2nd and 3rd numbers in the prescription. The 2nd number is the Cylinder correction and the 3rd number is the Axis of the cylinder correction. It specifies the direction of the long Axis of the Cylinder. Cylinder and Axis always go together. Astigmatism affects your vision at all distances and it usually makes it hard to read text or see small objects clearly. Astigmatism can ONLY be corrected with external lenses such as glasses, the best solution, or contacts, which don't always work very well. You have enough Astigmatism to be a real nuisance unless corrected.

Do you need glasses, Yes! You should probably wear them full time, but that is up to you. I suggest that you wear them full time for two weeks and then make a decision as to when you wear them. Initially, you may think that your glasses made your vision worse, but that is not true. Vision actually occurs in the brain and your eyes are merely biological cameras. Your brain is used to correcting the somewhat distorted images your eyes are providing. Your glasses will correct those images optically, but it will take your brain a few days to get used to not having to do the extra work. I think you will find that your glasses really do help and wearing them is a lot more comfortable than not wearing them.

May I ask your age, occupation, and where you live?

If you have more questions please ask.

C.


Tracy 11 Oct 2015, 16:21

Prescription:

OD sphere +.75 cylinder -1.25 axis 106 add 1.25

IS sphere +1.25 cylinder -1.00 axis 73 add 1.25

Could you please explain my prescription, do I really require glasses, progressives were prescribed for full time use.

Thank You

Tracy


Soundmanpt 11 Oct 2015, 07:46

Cork

It is almost certain that if she were to for yet another eye exam she would have another set of numbers to deal with and question as to which on is correct. In most cases almost everyone no matter what their age can go and get their eyes examined every month and come away with new numbers each time. In some cases just the difference of time of day can make a difference. For example someone going in for an eye exam on Monday after being off work over the weekend a then going again month later but going for their exam after work on a Friday chances are the Friday exam will be slightly stronger than the Monday one was.

Really in your wife's case the recent ones are really not that far apart from one another. The main difference I see is the CYL (astigmatism) numbers vary a bit. I think the middle one may have given her problems since her one eye went up from -1.25 to -1.50 and the other eye went down quite a bit from-1.75 to -1.00. The most recent exam is much closer to her one fro a year ago. If you look -1.25 is now down a tiny to -1.00 and her other eye is also down very slightly from -1.75 to -1.50. Of course the SPH is very similar in her 2 recent exams so again I would go with the most recent one -5.25 and -5.00. You can ignore the axis numbers as that is simply the angle of the lenses and thought they are important not out of line in either of her recent exams with each other.

Also this is very important. Any glasses she gets because she clearly has some changes, she needs to allow her eyes time to adjust to her new glasses. She needs to wear them for at least a week to 10 days before deciding that they aren't right. WEARING THEM FOR A DAY OR TWO WON'T DO IT.


Cork 11 Oct 2015, 06:50

My wife's old prescription from about a year ago was:

-4.75 -1.25 15 +2.50

-3.50 -1.75 165

She does have cataracts brewing and is 64

She recently got this:

-5.25 -1.50 018 +2.50

-4.75 -1.00 161

She didn't like those..just weren't comfortable, so I suggested she go elsewhere, where she got (one month later):

-5.25 -1.00 020 +2.50

-5.00 -1.50 162

She wants to order new glasses on line and doesn't know what to order. Any suggestions, or should she go for a third exam?


Likelenses 10 Oct 2015, 14:06

Sandy

It is very odd that your right eye has gone from a moderate amount of myopia to a slight amount of farsightedness,and at the same time is having a boat load of astigmatism.

The left eye decreased a small amount in its myopia,but nothing drastic.

I would say that the double vision is caused be this drastic change,and that perhaps it is caused by the glaucoma.

By now you should have your new glasses,and hopefully they will solve the double vision.

Also by now you know the answer to the appearance of your lense differences.


Tanya 10 Oct 2015, 05:52

I went back to Specsavers last week.I told them that my reading glasses were fine but the distance ones weren't. My distance vision was slightly better with them, but not enough to justify wearing them. I couldn't see the computer screen at all. They said that they would change the lenses to intermediate. I said just to make them reading glasses as well as I can see the computer fine with my readers but they said the intermediate will be better.I agreed to this. What kind of script can I expect in intermediate? I have a funny feeling they will not be strong enough!My RX is posted below. Thank you


AnyGuess 07 Oct 2015, 06:38

Hello,

Can you guess this lady prescription?

http://s16.postimg.org/pw3h0tlcl/IMG_4599.jpg

http://s18.postimg.org/y2uqnpfmx/IMG_4600.jpg

thanks,


Sandy 05 Oct 2015, 06:58

Likelenses,

The Sphere is +0.50 as you've mentioned. This is for the new glasses that is yet to be collected. I have had glasses for over 25 years. My current Rx is R: -3.00/-0.5 x 83

L: -3.00/-0.25 x160

I have had these for over 2 years but for a few months I have not been able to see clearly out of them and is currently experiencing double vision in my right eye when I read. I now have to squint to see the computer screen to write this message no matter how large the print is. I cannot focus out of my right eye to read whether close or distant.

The fact that I now have myopia in one eye and plus lens in the other, would there be a noticeably difference for onlookers? May be I should consider contacts? I have presbyopia and glaucoma as well. What could cause the double vision though?


Tanya 03 Oct 2015, 06:59

Thankyou for the replies. I picked the glasses up this morning. The optometrist never suggested bi or multi foculs, she was pushing contacts.

Anyway, the reading glasses are great but the distance ones are a waste of time. Yes, everything looks a bit sharper, especially my night vision, but not enough to justify wearing them. The optometrist said I would have good computer vision with them but I don't. I am wondering whether to go back?


Tanya 03 Oct 2015, 06:59

Thankyou for the replies. I picked the glasses up this morning. The optometrist never suggested bi or multi foculs, she was pushing contacts.

Anyway, the reading glasses are great but the distance ones are a waste of time. Yes, everything looks a bit sharper, especially my night vision, but not enough to justify wearing them. The optometrist said I would have good computer vision with them but I don't. I am wondering whether to go back?


Likelenses 02 Oct 2015, 15:30

Sandy

The Rx that you posted as,My Script is: R +0.05/ -2.00 x 70 Add: +2.00

L -2.25/ -0.5 X 160 Add: +3.00 ,is quite unusual.

First I believe that for your Rt. eye you made a mistake,and it should be + .50 for your sphere.

Second there is a massive difference in your sphere,and also in your cylinder,between eyes.

Third the add difference is unusual,but perhaps because of the amount of minus for your left eye,you need more add to give you a larger image for close work.

Is this your first glasses,or have you worn glasses prior,and if so what was the Rx ?


And 01 Oct 2015, 13:37

My gf has always worn contacts and has recently worn otc readers. She has now been for a test and ordered some progressive glasses. Do they take a lot o getting used to ?

Her prescription is now -8 +1.25. Does that mean if ahe continues to wear her contacts (-7.50) she can wear +1.25 readers - I'm sure the ones she currently has are stronger than that.


Cactus Jack 01 Oct 2015, 08:19

Tanya,

The prescription is pretty reasonable for a 51 year old with a bit of Hyperopia and a moderate amount of Presbyopia.

R Sphere +0.50, Cylinder -0.25, Axis 73, Add +1.75

L Sphere +0.50, Cylinder -0.25, Axis 120, Add +1.75

This is actually a prescription for Bifocals or Progressives, but it can be made as two pairs of glasses, one for distance and one for reading. If you apply the Add to the Distance prescription, for reading, you will get:

R Sphere +2.25, Cylinder -0.25, Axis 73

L Sphere +2.25, Cylinder -0.25, Axis 120

The Sphere corrects a small amount of Hyperopia or Far Sightedness

The Cylinder corrects a small amount of Astigmatism and the Axis is the direction of the long axis of the Cylinder. They always go together.

The Add is for reading and if you only want distance, you just leave off the Add.

If you have never worn glasses, you may find that you actually have a bit of what is called Latent (hidden) Hyperopia and the Sphere may increase a bit over the next few months. The Add may also increase some depending on how close you like to focus, but It won't be a lot. Let us know if you have more questions.

C.


Soundmanpt 01 Oct 2015, 08:06

Tanya

Based on your prescription I am curious why you don't just get one really nice pair of progressives (bifocals) and not fool around with having 2 pairs of glasses? Your optometrist is correct your distance vision is actually still pretty good but still less than perfect. Just as she said wearing glasses for distance would provide you with crisp, sharp vision. It would still be up to you when and how much you choose to wear your glasses. But certainly a better idea than switching from one to the other. It think you would certainly find that wearing glasses for driving would be nice and even better after dark.


Tanya 01 Oct 2015, 07:48

Hi, I have just went for an eye test. I am 51 and have been prescribed glasses before but didn't want to wear them. I have bought OTC glasses for reading. 6 years later the optician said I need glasses for distance and close up. I have ordered 2 pairs, one distance and one close up. I only got one script.....R +0.50 -0.25 73 1.75

L +0.50 -0.25 120 1.75

She said my distance vision would be sharp and crisp.

How do you interpret this prescription?

Thank you


Sandy 01 Oct 2015, 05:51

Likelenses,

My Script is: R +0.05/ -2.00 x 70 Add: +2.00

L -2.25/ -0.5 X 160 Add: +3.00


Likelenses 30 Sep 2015, 20:23

Sandy

Sounds like you were given trifocals.


Sandy 30 Sep 2015, 14:53

I get a split add in my prescription, is that normal?


Sandy 30 Sep 2015, 14:53

I get a split add in my prescription, is that normal?


Robert S 28 Sep 2015, 19:29

Steph

You shouldn't be embarrassed about being a -6. Lots of people are wearing glasses now even strong ones. I went back to school to finish my degree and I notice easily over half the class is wearing glasses and it seems more females than males are wearing them. Just to let you know I been doing the glasses over contacts thing using some -12 glasses starting last week and I don't notice any weird stares. I even did a presentation in front of the whole class with them on and I did not notice anything too unusual but then again I was kind of nervous from the actual presentation more than wearing the -12 glasses.

I started to notice in that class the following week more students brought their glasses after I did that presentation. Another funny thing is me being able to read the boards perfectly fine with the -12 glasses compared to some other students who are not wearing any glasses squinting to see the board.

here is a pic of them

http://supermediaserver.com/glasses/pics/-12.2.jpg

I have a small set of glasses in the -5 range that I normally use when I work using no contacts. Recently I been wearing some -7 and -8's to work and no one has said anything about it but then again I almost show up with a different pair everyday. I have all sort of colors to choose from blue being my favorites.

As for being a -6 at your age you shouldn't have to worry about it too much unless you start getting some large changes over short periods of time. If you are going to school you should invest in a reader set of glasses which helps slow down progression. They are just a set of glasses about 1-2 diopters less than your current RX so it would be -4 in your case.


Steph  28 Sep 2015, 16:01

I have to wear glasses all the time because I'm shortsighted. My prescription is -6.00 im only 23. How bad am i shortsighted? Other people i know that wear glasses are not as bad prescription but wear there glasss all the time. Should i be worried being so shortsighted? Im kind of embarrassed with my prescription now


Adam 11 Sep 2015, 10:04

Thanks guys


Cactus Jack 10 Sep 2015, 09:23

Adam,

You should wear them for driving. It is probably not legal for you to drive in most countries, without correction.

I suggest that you wear your glasses full time for 2 weeks and then make a decision about wearing them. If you have read any of my posts on the Vision thread, you will understand why. Vision occurs in the brain, the eyes are merely biological cameras. Your brain can correct what you see if it knows what something is supposed like, but it is at a total loss for details in the images if you are looking at something you have never seen before. You need to give your brain time to learn what it like to have High Definition images that need little or no interpretation or correction.

C.


Danbert 10 Sep 2015, 02:45

Adam,

Other than driving, it's up to you. You can probably get by without them just fine, but if you do wear them you'll probably come to appreciate the improvements.

You would see everything a little more clearly beyond 1m with them on. I imagine you can't read some smaller writing on signboards too well without correction. Your astigmatism is very low so you're unlikely to notice much if any improvement closer up.


Adam 07 Sep 2015, 12:41

I just got my first pair glasses -1 0.25 90 and -1 - -. I'm 33. Should I just wear these for driving?

Adam


Cactus Jack 07 Sep 2015, 08:06

Gaby,

There have been at least two and maybe three members who had successful Lasik and wished later they had not had it done. Most of the discussions were on the Induced Myopia thread. For the most part, their efforts to become myopic again were unsuccessful. I do not have a good answer as to why they wanted to become myopic again, but I know why they did not have much success. They were all at least their mid 20s or a bit older.

I have also noticed one or two real life instances where a person, of some celebrity, was a bit hyperopic and had Lasik to correct it. A few years later, they were wearing low PLUS glasses again, full time for both distance and close work. That suggests that Latent Hyperopia and Presbyopia were factors in their going back to wearing glasses.

There are most likely millions of cases where Lasik was successful and lasted for many years until Presbyopia made close focusing help mandatory. The point of this is to suggest that you consider your age and how long you will be satisfied with the results.

C.


Gaby 07 Sep 2015, 00:03

I've decided not to have laser eye surgery and just got new glasses. Optician say with my -3 prescription is easy and can wear any glasses frames lucky I'm not vain and don't mind wearing glasses all the time. Imagine trying to see without them all day? When you say it like that I guess if most people went to the opticians they would find them shortsighted or astigmatism?


Dan 02 Sep 2015, 17:03

Not a huge deal but just had my annual eye appt and got my script bumped up 0.25 to -1.50 with -0.25 of astigmatism in one eye. Im the Dan who is 26 who has used reading glasses/bifocals from time to time over the last several years. Have never gone full time with them though. I use reading glasses over my contacts when I need to.


Cactus Jack 01 Sep 2015, 17:01

SC,

Yes it can, because of how the the optics of the eye, work.

Based on the limited information you provided, it appears that you are Hyperopic or Far-sighted, different names for the same type of Refractive Error. You have a mismatch between the total power of your eye’s lens system and the distance from the back of the Crystalline Lens to the Retina.

It is likely that your genes kept your eyeballs from growing enough for the images of distant objects to focus clearly on your retinas. The image is actually focusing behind your retina. In the case of your Right eye, the image focuses about 0.45 mm behind that Retina and the image in your Left eye focuses about 1 mm behind that Retina, a difference of about 2 diopters. It is normal for there to be a difference in the Sphere prescription for each eye. There is nothing that says your two eyes HAVE to track together as they grow.

The purpose of glasses or contact lenses is to correct your Distance Refractive Error. In your case, you need some extra PLUS to mover the focus of the images up to the plane of the Retina. Needing some extra PLUS is the same, optically, as having too much MINUS. Without your glasses, your eyes actually have too much MINUS. If you look through a MINUS lens, it tends to minify the images you see. The lenses in your Left eye appear to minify what you see a little bit and the lenses in your Right eye minify the image a bit more. When you wear your glasses, the PLUS lenses neutralize the “excess MINUS” and mover the images up to where they focus on your Retinas.

There is another optical effect that can cause images to appear larger or smaller, it is called Vertex Distance, which is the distance form the back of the glasses lens to the front of the Cornea. However, the magnitude of the effect depends on the Power of the Glasses Lens and the distance from the Cornea. Lens power that are less than about + or - 4.00 have almost no Vertex Distance effect and it can be ignored.

I hope this long winded explanation makes sense, but you might have to think about what is going on and read it several times to understand. What you are experiencing is normal with your prescription.

C.


SC 01 Sep 2015, 11:39

Cactus Jack,

Does image size vary without glasses. My left eye is worse than my right and, although it is difficult to measure, the image also seems smaller when bare eyed.

I don't seem to have much of problem fusing the image if I wear glasses that are +1.5/+2.0 higher in my left eye than my right - I don't see a difference in image size. This is despite the fact that I mostly just balance the left eye - ie it has the same Rx as the right.

Right is +1.5, Left is about +3.5


Cactus Jack 28 Aug 2015, 13:18

Gaby,

The primary cause of refractive errors is a mismatch between the total optical power of he eye's lens system and the distance from the back of the Crystalline Lens to the Retina. Typical total power of the lenses in the eye are around +56 diopters and the distance from the Crystalline Lens to the Retina is about 17 mm, but it depends on how much the eyeball grew from childhood to adult hood. What we think of as large refractive errors really involve some very tiny distances, about 0.3 mm per diopter. If a person is Myopic and needs - correction, the eyeball grew too much. If a person is Hyperopic and needs + correction, it didn't grow enough.

Genetics is the primary thing that controls eyeball growth and visual environment is secondary. Normally, each eyeball grows at its own rate and it is rare for both eyes to have exactly the same refractive error. It is also very rare for there to be a really big difference. Up to about 3 diopters difference is pretty common. Occasionally, there will be an occurrence where one eye is Myopic and the other is Hyperopic.

A difference in lens powers in glasses can cause a difference in image sizes on the Retina because of Vertex Distance effects, but it usually only causes problems when the difference is large and the prescription is significantly above +/- 5 diopters.

C.


Gaby 28 Aug 2015, 11:51

I didn't know that you can have such a difference when being shortsighted is this normal? I was with a friend that wears glasses and I thought her eyes wasn't that bad but I tried a pair of her glasses that were left on the side and I couldn't see with them -2.00 & -5.00 says has a good eye but is can't see when without glasses. How can that happen?


Weirdeyes 18 Aug 2015, 00:08

My mom was about +5.00 before lasik. She now wears various strength reading glasses part time. They range from +1.25 to +2.00. I've seen her wear all of them for distance.


Beachin' 17 Aug 2015, 20:54

Gaby, I'm not quite as active on here as some of the others but I'll share my observations about the mid-term term results of Lasik.

I've had several close friends (and one husband :) get Lasik in their 20s. All but one friend is glad they had the procedure done (he didn't have any complications).

A couple of my friends have needed a second touch up procedure or have a small minus prescription (10-15%) years after their initial procedure. A larger number either need reading glasses early (before 40) or seem to have trouble reading in lower light situations (20-25%). For example, if i'm in a dark restaurant or bar my husband can't read the menu as well as I can.

I'm still in my 30s so I don't have enough sample size of friends over 40 to make any accurate projections about presbiopia . Hope this helps!


Melyssa 17 Aug 2015, 04:38

A woman at work who is two years younger than I am had Lasik done 5-10 years ago, after having had a prescription close to mine. Generally when I see her she is not wearing glasses, but in meetings we have both attended, she has worn rather strong plus glasses.

In addition, a friend's husband had the RK surgery done in the 1990s, and he has a multitude of reading glasses around their house, as he couldn't even read the best thing there is to read -- a pay stub -- without them.


Likelenses 16 Aug 2015, 22:53

specs4ever

I know a woman,now age 49 that was a high myope,of about -14 or so,

About ten years ago she had laser surgery,and was without correction. Then about two years later she was in reading glasses,and two years later full time low plus.

Last year they became full time bifocals,the upper part looking like + 3 or there about.

I always enjoyed seeing her as a myope,now her specs are quite boring.


specs4ever 16 Aug 2015, 22:23

My wife has a girlfriend who was somewhere around -3.50D. She had laser surgery in her early 40's - one of the early ones. Within 5 years she was wearing plus glasses almost full time, and now after 15 years she wears a prescription of very close to plus 3. I always wonder if she had stayed with the minus prescription would her eyes have gone to requiring no prescription at all by now?

This is not the first time I have heard of a milder minus prescription going back to close to no prescription as the person aged. This alone would make me think twice about having surgery.


Soundmanpt 16 Aug 2015, 06:57

Gaby

The only difference is that many women now consider wearing glasses a fashion accessory much the same way as you would be looking at jewelry and even buy fake ones if they don't need vision correction. Merely trying to point out things since you seem to be considering getting lasik. If you were a male these things would be of little interest to you.


Luis 16 Aug 2015, 06:42

Hi Slit, all still good following your cataract surgery?


Gaby 15 Aug 2015, 15:03

Female what difference does is make? Yes I wear glasses all the time do you think I dont need them? Optician says is a very common prescription when shortsighted. Also lucky it's not got too -5 -6 -7 which is quite normal.


Soundmanpt 13 Aug 2015, 16:20

Gaby

So I assume that your eyes have been stable with no change for at least 18 months? That is very important in determining when to get lasik. Your optician is correct that your prescription should be easy to bring your eyes back to not just 20/20 but more likely 20/15 or even 20/10. Now with other things there is no way to know if after a short time if your eyes may need a small correction or not. But I would doubt that you ever need to wear glasses full time again, at least not for distance. But you almost for sure will find that you will be needing readers at some point. Most places do have warranty that if your eyes would somehow get to around -1.50 again they will do a "touch-up" procedure at no cost to you to bring your eyes back to perfect again, however again like I said I doubt that if your eyes were to ever need glasses for distance again that it would be anymore than maybe -.50 or -.75.

So at -3.00 I would assume that your wearing your glasses full time? So it is up to you if want be at least pretty much glasses free or not. I can tell you that oddly quite a few that have gotten lasik soon actually starts to miss their glasses and even go back to wearing they don't really need.

Your title didn't indicate if your male or female but I can say that wearing glasses has become very popular with the females. So much so that many boutiques stock a good number of fake glasses.


Gaby 13 Aug 2015, 15:48

I wear glasses or contacts all the time I'm shortsighted -3.00

My optician says I have a good prescription to have lasik. Should I think about getting it done was about £2000. If you have it done you might need glasses for driving or for reading in time for sure so Is there much point to have it done?


Slit 10 Aug 2015, 03:24

this was not posted by me: "Slit 09 Aug 2015, 13:51"


Slit 09 Aug 2015, 13:51

Mo cataracts here. Too young. Only farsightedness.


Andrew 02 Aug 2015, 13:34

I'm due mine any day now. I'm holding out on booking it in the hope that the reminder will contain a nice money off coupon.


Melyssa 02 Aug 2015, 08:22

Another year, another eye exam, the same prescription as always, and the same situation of having to wear sunglasses for five hours afterwards thanks to the triple set of eye drops.

The eye doctor is still keeping any eye on my retinas and cataracts, pardon the pun. Fortunately, there is nothing to be concerned about at this time.


Cactus Jack 01 Aug 2015, 10:09

Marurice,

Cataracts most often develop in older people, but age itself is not the cause. You can develop cataracts at any age. Occasionally, babies are born with cataracts.

C.


Maurice 01 Aug 2015, 08:59

I thought that Slit had cataract surgery also, bit it turns out that is not correct. Slit is too young to have developed cataracts.


 24 Jul 2015, 12:10

Seems like Slit recently had cataract surgery---wonder if he might have give some insight.


astigmaphile 19 Jul 2015, 21:16

Medicare does not cover limbal relaxing incisions or other forms of astigmatism correction. The basic purpose of the IOL is replacing your crystalline lens. There are toric IOLs . When I had manual keratometry before surgery I was asked if I wanted one. I didn't want to pay for it, so I said no.


Cactus Jack 19 Jul 2015, 20:41

Stingray,

I believe Medicare will pay for single vision IOLs, but I think your Best Corrected Visual Acuity has reach something like 20/40 before they will authorize the surgery. If you want multi-focal IOLs you have to pay the extra cost.

IOLs are not used to correct astigmatism. Astigmatism is caused by uneven curvature of the front surface of the cornea. These days Cataract Surgery and a laser procedure are sometimes done at the same time to correct both the cataracts and astigmatism. However, it is my understanding that Medicare does not pay for the Astigmatism part of the surgery.

C.


astigmaphile 19 Jul 2015, 20:39

Stingray,

I had cataract surgery on my left eye 27 Jan 2011. Medicare paid for most of it. I do not have secondary insurance, so I had to pay for the antibiotic eye drops and the steriod one that I used after surgery. Medicare covered a plain monofocal IOL. Torics and multifocals , you pay for. I don't know if any of this has changed.


Stingray 19 Jul 2015, 18:58

Thanks Carl for the info. Maybe I'll opt for the surgery sooner toward the end of the year. Do you know if Medicare pays for this? I also have decent secondary insurance in case Medicare won't pay. About those IOL lenses, do you just get the distance (spherical) lenses or ones for astigmatism. Can they do both spherical and cylinder in a single lens? I'm 68 by the way. This is all new to me. I guess I need to do some research on this and find out what my options are.


Cactus Jack 19 Jul 2015, 18:06

Stingray,

Probably. Cataract formation often changes the power of the crystalline lens and the clouding effect reduces light transmission and introduces distortion.. Many insurance programs will not pay for cataract surgery until DCVA falls below 20/40 or you can no longer safely drive at night.

There is often a desire to put off cataract surgery for as long as possible. It is scary to even think about it. I had cataract surgery in 2001 and I have 3 friends who have had cataract surgery within the past 6 months. They were very apprehensive about the surgery (as I was before the first surgery). I told them about my experiences and it seemed to help. They could not quite understand why I looked forward to the surgery on my other eye after the first surgery, until they had their first surgery. Typically, there is a minimum of 2 weeks between the surgeries to make absolutely sure there are no complications from the first. After the first surgery, all three friends, said they now understood the benefits and ease of the first surgery and could not wait until they had the other eye fixed. Without exception, all 3 friends regret putting off the surgery as long as they did.

My only suggestion is that you think hard before being tempted to have multi-focal IOLs installed, if you like really sharp vision. You are probably going to still need glasses. I opted for mono-vision where one eye is for distance and the other is about -1.50. I can function without glasses, but because of some astigmatism I function better with glasses. In all three cases the only significant restriction was heavy lifting and protecting the eye while you are sleeping with a shield. Be sure and follow the prep instructions to the letter.

BTW, I now have 20/15 VA with my glasses in each eye minus a letter or two.

C.


Stingray 19 Jul 2015, 15:58

Cactus Jack: Do you think my visual acuity will deteriorate more if I put off the surgery until next year?


Cactus Jack 19 Jul 2015, 06:43

Stingray,

There is really no advantage to waiting for Cataract Surgery unless it is for insurance or regulatory reasons. Before the development of modern cataract surgery with Intra Ocular Lenses (IOLs) there was a very good reason for waiting until the cataracts got "ripe". The operation was so serious, so risky, and required months to recover, that it was hoped that you would die before you completely lost your vision. After recovery, you would need very high PLUS glasses to see even moderately well. High PLUS glasses have such limited peripheral vision that it is unlikely that a person who needs them can legally drive.

Modern cataract surgery changed all that. Today the operation is the nearest thing to a non-event that there is and there are significant disadvantages to waiting. Unless there are some very rare complications, the surgery only takes about 10 minutes and is performed through a 3 mm incision in the side of the cornea. Recovery time is very quick with no restrictions after a week or 10 days (usually the restrictions are minimal and not inconvenient).

The problem with waiting is that part of the procedure involves emulsifying the old lens with a very tiny "ultrasound jackhammer" and sucking it out. If you wait until the cataract becomes hard, it is harder to emulsify and suck out.

You may be wondering how you can get an IOL that is larger than 3 mm through a 3 mm incision. The answer is that it is rolled up and inserted with special tool. Your body heat causes the lens to unroll and it is positioned in the lens capsule where the crystalline lens used to be.

C.


Stingray 19 Jul 2015, 05:25

I bit the bullet and went for an eye exam after a year and a half. Trouble seeing at night when driving. That turns out to be cataracts which will need removal next year some time. In the meantime, my last rx was in November, 2013. It was:

OD: Sphere +1.50 Cylinder -1.25 Axis 095

OS: Sphere +1.75 cylinder -.25 Axis 095

New Rx:

OD: Sphere +2.25 Cylinder -1.75 Axis 102

OS: Sphere +2.50 Cylinder -1.00 Axis 100

Seems to me like a big jump in less than 2 years. Any comments?


Melyssa 29 Jun 2015, 04:44

Soundmanpt,

First and foremost, I am glad your knee is getting better. Even without the cane, be careful balance-wise.

On to the subject at hand, I have kept a bunch of frames with plano ("PLAY-no") lenses in them for when one breaks. That happened early this year so I got large orange cat's-eyes with white polka dots made up. Due to another pair with a slight crack in it, following next month's annual eye exam I will replace that pair with another pair of cat's-eyes to be determined. I've been thinking about using the purple one, as I have just one other in that color.

As for the employees' frames du jour, I would certainly like to have the 4-color cat's-eyes in my RX, but the white cat's-eyes that are clear at the bottom would have needed normal nose pieces, not the ones I always had trouble with. As for the women wearing larger frames than I had on that day, I have seen two of them wearing decent-sized frames before, and the third woman I had never seen before. You know how it is -- optical stores have a lot of turnover in employees as well as frame styles.


Soundmanpt 28 Jun 2015, 09:54

Melyssa

I could be wrong but it seems like you haven't purchased any new glasses for some time. I can only assume its because you haven't found any that you just can't live without?

Were you somewhat surprised to find that all the employees where you went to get your 4 pairs adjusted were wearing bigger glasses than you? Was there any of the ladies wearing glasses that you would have liked to add to your collection?


Melyssa 28 Jun 2015, 07:54

Likelenses,

You were close -- just 455 minutes over. LOL

"Some" in this case meant 4 pairs.


Likelenses 28 Jun 2015, 02:54

Melyssa

So getting SOME of your glasses adjusted,how long were you there. My guess about eight hours,LOL !


Melyssa 27 Jun 2015, 10:31

Soundmanpt,

She's not new; she's been the manager since even before I first went there. And that was the first time (maybe ten times) I ever heard that pronunciation.


Soundmanpt 27 Jun 2015, 08:20

Melyssa

You are correct. It is "plano" that employee must have been quite new and if she was talking to a lab they probably got a chuckle out of it.


Melyssa 27 Jun 2015, 08:08

The other day I was at my favorite eyewear establishment, getting some of my glasses adjusted. The entire time I was there, the manager was on the phone talking prescription numbers to whomever was on the other end of the line. It sounded as though just about every cylinder was +0.50 or -0.50, with axis numbers in the 150 range.

There is a city in Texas about 20 miles from Dallas named Plano, pronounced "PLAY-no" to rhyme with "Drain-o." Of course, "plano" in glasses vernacular means 0.00 diopters. The manager mentioned it quite often in her phone conversation, pronouncing it every time as "PLAN-no" to rhyme with "Book 'em, Danno."

Well, which is it? I say play-no and she says plan-no, I say tomato and she says tomahto, potato, potahto, lumbago, lumbahgo -- let's call the whole thing off! :)


Likelenses 24 Jun 2015, 01:32

Kate

Your prescription is not that strong,but without glasses things beyond about two feet are blurred.

I recently had a long conversation with an older retired optometrist. He said that the old school taught that any myopic correction should be worn full time,and that when a myope first gets glasses,they need to pay close attention to reading distance. You should wear glasses for reading, but never hold the reading material closer to your eyes than twelve inches.If you follow this your prescription will never reach more than about minus four.At your age you will have a few increases,but if you read at the proper distance and wear the glasses constantly they should be only about minus.50 per year for the next few years.

My prescription is -10.5 and vision without glasses is blurred at any distance,but in reality that type of blur kicked in when the prescription got to about -3.50

I know a few people that have low prescriptions ,and feel as you do ,that their vision is terrible without glasses,and I believe that some people can handle some blur better than others when the prescription is still low.One person wears -1.50 and says that she can not see at distance,or read at all now without glasses.


Soundmanpt 23 Jun 2015, 16:30

Kate

Once you start wearing your glasses full time it doesn't take long for the eyes to completely adjust to them. Now before you even think about it, no your wearing glasses hasn't any in anyway made your eyes worse. I'm sure it almost seems like they did, but the truth is now what you see without your glasses is what your REAL vision is now. Interesting that -2.00 makes so much difference to how well you can or can't see. Just be glad that your not like that person with the -6.00 prescription. It should make you feel better to know your eyes won't ever get anywhere close to being that bad.

Unless you got your contacts and glasses at different times the prescription of your glasses should be about the same as your contacts. Usually the only time glasses need to be slightly stronger than contacts is with a prescription of -3.00 or more. If your contacts were say -3.50 then its likely your glasses would need to be -3.75. The reason is because contacts sit directly on your eyes and glasses sit about 3/4" away from your eyes so stronger glasses lenses are necessary.

I'm sure you must know that once your nearsighted you stay nearsighted from now on. It's possible when your in your 40's you may need a reduced prescription but at the same time reading will be harder so you will be looking through your first bifocals. Yeah I thought that may have got your attention, but that is a good ways off. So aside from wearing glasses or contacts your only other option would be lasik, but I warn you that it is rather expensive so if you want that option you might want to start saving now. The cost with a high quality doctor is between $4,000.00 and $5,000.00 and insurance will only pay about 10% of that.

Getting prescription sunglasses is really a very good idea. In fact now that your wearing glasses full time you really do need them on those sunny days when your driving and staring right into the sun and you can't even consider wearing regular sunglasses anymore. Trying to push regular sunglasses over the top of your glasses is a bad idea because you risk scratching the lenses of your glasses. Remember if you don't want to spend a lot on prescription sunglasses Zenni is a great option and just like their regular glasses they won't cost more than $22.00.

I'm sure your still a little self conscience about wearing glasses and realize how many millions of other women are out their wearing glasses to understand that their not watching you because your wearing glasses anymore than if you weren't wearing glasses. Just as your eye have adjusted to wearing glasses now you have to get used to the idea that your going to be wearing glasses now. After a couple weeks you will get to where you won't even think about having glasses on.


Kate 23 Jun 2015, 14:25

Thank you I thought I did well not too wear glasses until now yes I have been told by people that -2.00 is not bad but I can't see without them now is surprisingly blurry. ive worn lenses all week and glasses and can't go without them now. Is amazing once you see how bad your eyes were before. My contacts are -2.00 think glasses maybe -2.50. Haven't worn glasses out too much someone joked telling me to take them off and someone else told me me my prescription was not much as they are with -6.00 am I always going have to wear glasses all the time now? I was thinking of wear prescription sunglassses so noone knows I'm shortsighted stupid or not? and yes is true I think people are looking me when I'm wearing glasses out just need to come that.


Andrew 22 Jun 2015, 08:09

Interesting comment from Kate about it being "not good being shortsighted." Until 10 years ago, I might have been more inclined to agree. Now, however, with presbyopia setting in, I am pleased that I can always take my glasses off to read, rather than having to find my glasses in order to read small print. So, just before I turn 50, I now welcome the fact that I am shortsighted.


Aubrac 22 Jun 2015, 04:05

Kate

I first had glasses at age 17 with a similar prescription to yours.

Your brain attempts to make sense of blurred images and is sometimes successful. This one of the reasons why your blurred vision seems worse after longer wearing priods of glasses or contacts but in actual fact there is no change and correction is not making your eyees worse.

When I first wore glasses I often thought people were looking at me because I was wearing them, I soon realised it was because I could actually see everyone so clearly.

Sometimes wearing contacts depresses the eye and so vision is slightly worse when changing to glasses for a few hours.

Best to wear what you feel most comfortable with but if you have 'dry' eyes, glasses will be a better option.

From age 26 for maybe ten years your prescription will most likely change but it is just the general course of myopia and nothing to do with wearing corrective lenses.


Soundmanpt 21 Jun 2015, 18:27

Kate

There is no doubt driving without either glasses or contacts isn't an option anymore. Without correction you would be a hazard not only to yourself but others on the road as well. I'm sure your still able to see the road rather well but your reaction time if anything were to be on the road is much too long now. Driving requires near perfect vision and your pretty well past having near perfect vision. Your eyes are far from being bad, but they are bad enough that they need the aid of glasses now. I'm sure with only -2.00 lenses your glasses look very nice. Try and look at your glasses as a fashion accessory like so many are these days. You should be happy that you only got glasses this late in life. If you had gotten glasses when you were in your early teens your glasses would be much stronger by now. But since your 26 you probably won't be getting many increases and your eyes will be stable. I'm betting since you got your glasses you have had plenty of complements on how nice they look on you? So when you head off to work tomorrow don't be shy about wearing glasses. You don't want to miss out on more complements do you? After a few days your glasses will become so comfortable you will hardly even think about them.


Kate 21 Jun 2015, 15:17

I wore contacts all day and eyes felt tired after a while I could feel them. I wore glasses all day the next day and felt good. Without wearing anything I can't read any signs so blurry. I couldn't drive without glasses and yes the car lights are so blurry at night. I can't believe I need to wear glasses all the time now takes getting use too. My opticians said if your nearsighted you have to get glasses so I guess it was going to happen. I went too long without Just when people see you wearing glasses for the first time i get nervous but haven't got a choice but wear them now.


ric 15 Jun 2015, 12:01

Kate, its usual. Your eyes were used to the blur vision and will quickly used to the clear vision that you have with correction.


Kate 15 Jun 2015, 11:50

I didn't want to wear glasses just yet I'm only 26 but I think I'm going to have to wear glases or contacts all the time now. Its not how old you are but if your shorsighted you cant go without wearing glasses right? I really can't see now when I take contacts out so blurry even at -2.00. I see how easy it is for people to need glasses all the time now. Not good being shortsighted but it's great to see so clear again!


Soundmanpt 14 Jun 2015, 07:29

Kate

If your new to wearing contacts your eyes need to slowly adjust to them and you really should only wear them a few hours each day so your eyes can build up to longer wear. But as easy as that sounds it can be hard to do if you wore them to work because it can be a bit difficult to take them off in the middle of the day and give them proper care. I'm sure if you don't normally wear your glasses very much or for very long by the time you got home and took them off besides your eyes not feeling very good everything had to be very blurry as well. That blur that you saw is what your actual vision is really like. But since you haven't wore your glasses all that much in the past your eyes have learned to accommodate very well and you don't notice the blur. If you were to start wearing your glasses full time you would see that same blur whenever you would take your glasses off. Just curious if you were mostly only wearing your glasses to drive why did you decide to get contacts? Getting contacts is pretty much saying that your intending on wearing vision correction full time. Wearing contacts will cause your eye to become quite dependent on needing full time correction. Look at how blurred everything was just wearing them the one day.

Glad to hear that you did also get new glasses along with your contacts. Your short sighted meaning that your eyes need help seeing things in the distance. Since your vision changed a bit your distance is a bit more limited as well, but at -2.00 your close vision should still be quite good and you should be able to see things closer without your glasses or contacts. So if I were you I think you should wear your glasses for what you feel like you need them and take them off when you feel like your able to do without them. Your contacts might be nice if your going on a date or out with friends and you would rather not be wearing glasses. Are you okay with wearing glasses or was that why you decided to try contacts?

Not getting glasses sooner you didn't do any harm to your eyes. You just didn't realize that you were missing seeing things that you should have been able to see. Seeing detail like leaves on a tree was just a green blob for you and you had to much closer before you could read signs. Those kinds of things, but it didn't make your eyes get any worse. If you had gotten glasses right away your prescription would be much the same as it is now. So that is the same today if your able to see pretty well without your glasses then don't wear them and only wear them when you feel you need them. Your not hurting your eyes in anyway.


Kate 13 Jun 2015, 14:57

I work with fabrics making curtains. Yes ive got new glasses. I have been wearing contacts all day and the last few hours they have been feeling like they were going to pop out, when I took them out I couldn't see a thing everything was a blur that's the longest ive ever wore lenses I didn't wear glasss much. I can't believe how shortsighted Im am now and at -2.00 they say is low. Not sure what to do tomorrow to wear contacts or try and go without? Have I made it worse by not getting glasses before?


Soundmanpt 13 Jun 2015, 14:08

Kate

Actually even when you got your first glasses you really needed glasses for sometime before you got them. If your 26 now and you got glasses at 25 you probably was already needing glasses at 22 or 23 for sure. You just ignored it like others tend to do. If you had gotten your eyes examined when you were 23 you would have probably been prescribed glasses at around -.75 in both eyes. Certainly enough that they would have been a help to you when driving and even more driving at night. If you think back I bet you may recall having some issues see at night when you were driving? Your eye care people were telling you right, you should have been wearing those first glasses full time from the time you first put them on your nose. You must have been able to tolerate blur extremely well if you only wore them for driving.

So instead of getting glasses it seems that you got contacts this time? Now you do understand that you still need to get glasses as well. You can't wear your contacts constantly or you will do damage to your eyes and you need to rest your eyes from contacts every so often. Your old glasses are too weak to be of much help. If you want to save money you can always just have then lenses updated to your new prescription. I'm sure if your wearing contacts every day day it won't take long before you won't be able to see very well without them. Things are going to be more blurry now.

Just curious but what type of work do you do?


Kate 13 Jun 2015, 11:15

I had my eyes tested by a optician for the first time ever last year and I got told I needed to get glasses. L -1.50 -0.25 110 R -1.25 -0.25 100. I'm shortsighted and need to wear them for driving. I haven't worn the glasses much but I've been having headaches and eye strain so I went back to the opticians today and my eyes have got worse. Ive just wearing -2.00 contact lenses in both eyes all afternoon and I feel great. I can see so clear and no headaches. Is it normal to start wearing lenses all the time at my prescription? Should I carry on wearing them all the time now? My optician says I should off been wearing glasses all the time before. I thought I was doing ok not to need glasses until i was 26 now its caught up with me.


Cactus Jack 12 Jun 2015, 17:18

Conrad,

I will be happy to help you understand what is going on, but it would be very helpful if you could supply the Axis for your glasses prescription. The first number in your prescription is the Sphere correction, the Second number is he Cylinder correction and the third number is the Axis of the Cylinder. The two always go together and the Axis is necessary to help you understand your prescription.

It would also be helpful if you could tell us your age and where you live.

As preliminary information, Cylinder correction can be written as a + number or a - number. How it is written will affect the Sphere number and the Axis number, but there is a relatively simple conversion between the two ways to write the prescription. Lens makers convert + Cylinder to - Cylinder and make the glasses. As long as the two proper procedures are followed, the glasses made using + cylinder or - Cylinder, the resulting glasses will be optically identical.

C.


Conrad 12 Jun 2015, 00:15

I'm a regular eyescener, but not nearly as knowledgeable as most of you. A question:

I had my annual eye exam yesterday; my old glasses prescription was -6.25 in both eyes, -5.75 for contacts. Here is my new prescription:

Glasses: -6.75 + .50 (astig)

Contacts: My eye doctor gave me a choice between staying with my -5.75 contacts or a new prescription, -5.50 -.75 (toric).

I guess my confusion is self-evident: why is there a + correction for astigmatism in glasses and a minus one in contacts? And I tried on the trial torics today, I could see worse than with my regular -5.75s. Could someone please shed some light? Thanks!


High Myopic 11 Jun 2015, 19:20

My new rx is -6 diopters for my left eye and -5 diopters for my right.

Up a half of a diopter from my old rx.


Melyssa 10 Jun 2015, 04:41

Soundmanpt,

I was about 8 at the time. I only wore those brown-top, clear-bottom modified cat's-eyes when watching TV or movies, or to see the blackboard in school. At least I was not the first one in my class to need glasses.

One day in school I made the faux pas of not taking off my glasses at lunchtime, but I did when I saw the food. :)


hypervisi 10 Jun 2015, 02:38

http://iovs.arvojournals.org/article.aspx?articleid=2127682

That's the study Chino is talking about, I believe.

I'm afraid that this only works if the ocular system is not yet fully developed. But I'm interested in learning otherwise. So, yes, Chino, please keep us posted.


bracesfan 10 Jun 2015, 00:35

Chino,

please let us know about the effect of red tinted glasses. It would be fantastic if the deterioration was so high.


Weirdeyes 09 Jun 2015, 23:48

The optometrist I saw when I was nine years old also said I wouldn't need a vision test for a long time.


Weirdeyes 09 Jun 2015, 23:46

I just remembered something very weird. I had one eye exam at the optometrist when I was nine(not a screening) and I don't remember him using an autorefractor. I squinted through the test, so he said I didn't need glasses. How could any optometrist think someone with weird eyesight like mine doesn't need glasses? Did he even bother checking my refraction? My most recent optometrist didn't use an autorefractor either, but he did check my glasses.


Soundmanpt 09 Jun 2015, 14:03

Melyssa

I know you have mentioned it before but what age were you when you got those first glasses? I know unlike now you weren't exactly thrilled about needing glasses and those very glasses were strong enough that you probably could / should have been wearing them full time right away. If you had wore them all the time even for more than a week I doubt that you would have been able to see well enough not to continue wearing them all the time.


Melyssa 09 Jun 2015, 12:16

First RX: All zeroes -- I had perfect eyesight. :)

First glasses RX: -1.75/-1.50, no other numbers available, but there was some astigmatism.

Current RX: -9.00 +3.00 90 (each eye), add +2.50.


Chino 09 Jun 2015, 05:35

I had wanted to be nearsighted and to need glasses since I was a little kid. I started inducing myopia when I was about 13 years old, back in 1994. I did this by putting my face right up to the TV in my room and focusing as hard as I could. Prior to inducing, I could see 20/15.

I got results fairly quickly. As that school year progressed, I started noticing things in the distance looking a bit fuzzy. I noticed people's faces looking a bit blurry. By the end of the year, I was starting to have difficulty reading the board.

The next year (freshman year of high school), I compensated for my eyesight by making sure to sit at the front of all my classes. By the end of the year, I noticed that the carpet looked fuzzy when I looked down.

By my sophomore year of high school (1996), I could no longer read the board, even from the front row. I started going up to the board and copying notes quickly at the end of class, but this was a pain. For some reason, I was embarrassed to tell my mom about my poor eyesight.

I found an old pair of my grandfather's glasses and, fortunately for me, he had been nearsighted as well. The glasses helped tremendously, but they were uncomfortable to wear due to a missing nosepad.

I finally told my mom that I was having trouble seeing when I signed up for Drivers Ed.

I went to the optometrist, and he was totally shocked that I had gone without glasses for so long. I had been walking around with -2.00D of uncorrected myopia in both eyes.

As I reached adulthood, I found this site and learned about using higher minus lenses to induce myopia. Basically, I could accomplish what I did with my TV, without having to sit right in front of it. I was able to use this successfully for some years, eventually increasing my prescription to where it is today:

R: -5.50, -0.25 x 90.0

L: -5.50, -0.25 x 105.0

I loved every moment of growing more nearsighted and needing stronger and stronger lenses. I love how blurry everything is without my glasses, and would get such a rush when I had to go to the optometrist.

I would have loved to keep going higher, but age eventually caught up to me. My eyes stopped responding to the minus lenses, and I couldn't induce myopia anymore.

I recently learned of a method for inducing myopia that makes use of red light. Based on further research and information exchange with Cactus Jack, it appears to involve a different mechanism than the accommodation & convergence that I'm familiar with. I don't know if it works on adults, but I hope it does. I intend to find out for myself.

I ordered some red-tinted goggles from Optical4less. They should be arriving next week. If it's going to work, I should see results fairly quickly. Experiments on animals showed that myopia increased at a rate of about -3D per month.

Blue light has the reverse effect, inducing hyperopia at an even faster rate (over +4.00D per month).

Wish me luck. I'll keep everyone posted on the Induced Myopia thread.


Weirdeyes 09 Jun 2015, 02:15

First prescription

R: 0.00

L: +1.25

Now

R: +1.00, -0.75

L: +4.25, -1.25

I have an optional +1.00 add, but I'm only 19


hypervisi 09 Jun 2015, 01:26

I'd like to start a new topic.

I'm just curious of how your rx has changed, not over the year, but since the beginning, thus your first rx and your current rx. I'll start:

First glasses: 2006

OD: +1.00, -0.5, 100

OS: +1.00, -0.25, 90

Current rx from december 2014:

OD: +1.75, -0.75, 102

OS: +1.75, -0.50, 89

I was prescribed an add of +1.00 in 2014 but I can still manage without (barely). I reckon that towards the end of the year I'm in for my first multifocals. I'm 36 years old by the way.


SC 08 Jun 2015, 08:30

Had new glasses for 2 weeks.

Old:

RE +1.0 -0.5 x80 add +2.0

LE balance

New

RE +1.5 -0.5 x80 add +2.25

LE +1.75 -0.5 x173 add +2.25

I'd known about the need for +1.5 distance for a number of years but successive eye tests had failed to relax enough to show it.

Impact of the change is quite big: I now have the 'stairs' problem in that looking down is out of focus. I also have a field of vision issue in that the RHS of the progressive is also out of focus - so I see things better outside the frame when it first enters my field of vision, then it goes blurry and then it comes sharp - I guess trifocals would fix this.

Optician said it may take time to adjust to the stronger distance but this had happened before I left the shop!


Soundmanpt 31 May 2015, 17:25

B20 Don't let it bother you. Every so often we get one of these no name bastards that contributes nothing more than calling others fakes. It's always best to ignore them and they soon crawl back under the rock they out from.

Like you Carrie has heard the same kind of things every so often about her not being real as well as myself.


astigmaphile 31 May 2015, 15:19

Here go the flame wars again. And, as usual, the flamer is anonymous.


B20 31 May 2015, 12:39

Woah, I'm not fake. I'm happy to provide proof to a mod if you don't believe me.


Soundmanpt 31 May 2015, 11:30

If you don't want to believe me i could care less. Have a great day. I plan to.


 31 May 2015, 11:14

Sure, they are.


Soundmanpt 31 May 2015, 07:15

I am getting older and i'm sure some as they age start talking to themselves, but so far I have not reached that point. So that would include imaginary friends as well. So I assure you that Carrie and B20 are NOT people that I have created.


 30 May 2015, 21:40

Some Soundmanpt, fiction. Carrie and B20, don't rxist.


B20 30 May 2015, 21:16

The site is still in beta and I received an invite about a month ago. At the bottom of my invite email was a link for friends: goo.gl/ujyKUm

Please let me know if this link works for you.


Likelenses 30 May 2015, 14:18

B20

I was under the assumption that The Opternative Test was not up and running yet.

Can you provide a link to the operative site.


Soundmanpt 30 May 2015, 06:14

B20

Just to see the alternative if your at a store that sells over the counter reading glasses you should maybe buy a cheap pair in +1.00 and give them a try mostly when your doing close work just to see how your eyes react to them. You probably don't wear your distance glasses at work anyway so the real test would be how your feels by the time your leaving work? My guess is that your eyes may feel less strained and less tired with the reading glasses. Now that doesn't mean that you need to actually start wearing the +1.00 glasses at work since your still able to see well enough without them.


B20 29 May 2015, 22:22

Hi Guys,

I'm 25F and I work in IT.

My first rx at age 10 was

OD -0.75

OS -0.50

My rx at age 17 was

OD -1.50

OS -1.25

I recently lost my glasses and went to America's Best to get a new rx. The doctor asked if I had had glasses before and I said yes. She asked if I had problems seeing near or far and I replied that my distance vision was worse. She was really surprised and asked if I was sure. The auto refractor printed up a slip that had 5 rxs on it. They were between +0.75 and +1.0 for both eyes. An rx was written for me as:

OD +0.75

OS +0.75

I doubted the accuracy, so I went home and took the Opternative test. The rx that was emailed to me the next day was:

OD -1.75

OS -1.25

I got new glasses in that rx and I can see distance perfectly. Now, I guess I didn't realize it, but my near vision seems to be a lot worse than my much older co-workers (mid 40s). Is it possible the I am already developing presbyopia this early? Could this have thrown off the auto refractor?


bracesfan 29 May 2015, 00:04

Hd,

you put down three various prescriptions:

-3.25 -0.5 180, -3.25 -0.5 180

following:

-3.00 -1.75 5, -3.50 -1.00 5

and the latest:

-3.00 -1.75 18, -3.75 -1.25 18

I think everything is perfectly OK. No ECP would allow leaving some number out.

It´s absolutely normal that the axis changes during the time. Here you have a typical example. The axis changes a little from 0 (180) degrees to 5 and then to 18.

What´s uncommon is a rapid change of cylinder power between first and second prespcription.

If there was a mistake in axis in prescription (from 180 to 18) you would surely learn that from rapidly worsened vision.


Jamie37 28 May 2015, 08:59

Well, after too long of a period between checkups, I finally had a current eye exam performed yesterday. The good news is that instead of an increase, actually had a very slight decrease in my rx. Also, while heading down the road, not at the point of needing bifocals at this point. Although was mentioned that not to be surprised if next year or two that might change.

:)


Cactus Jack 11 May 2015, 08:27

Hd,

I think the problem with the

-3.00 -1.75 18

-3.75 .1.25 18

prescription is that the 0 was accidentally omitted on the 18. It should have been 180. With low cylinder prescriptions, the axis is important, but not as critical as it is with cylinder powers equal to or greater than +/- 1.00.

I would suggest that you go back to your ECP and request a re-check. If she agrees, ask her if she will let you "fine tune" the cylinder axis at the appropriate point in the exam. The appropriate point is usually when the prescription for each eye is finalized.

The last part of the exam for each eye individually is to gradually increase the Sphere MINUS or decrease the Sphere PLUS until the 20/20 or 6/6 line is clear and readable without straining. If the ECP is agreeable, she should place your hand on the AXIS adjustment knob of the Phoropter or Trial Lens Frame. Move the knob back and forth a few degrees and stop where the letters are clearest and do not appear distorted. That is all there is to it. You will need to do this for both eyes individually.

Most ECPs will appreciate that you want to constructively participate in the exam. There is no possible way for the ECP to see what you are seeing. They must depend on your description of what you see.

There is one other place in the exam where you may need to speak up if you see a difference in the sharpness of the images from each eye. At the conclusion of the exam for each eye individually, the examiner will open the shutter for each eye with enough prism in place so you see two images that are separated vertically or horizontally. The examiner will gradually adjust the amount of prism and ask you to tell him/her when the two images are aligned. This is the only opportunity to compare the two images for clarity and sharpness. If one image is sharper than the other, say something. Usually, the examiner will alter the prescription in the sharper image so that it matches the other image in sharpness. Don't worry about the reduction in sharpness, because the that will be fixed after the prism test when the final prescription is determined, for both eyes working together.

At 23 it is likely that your myopia is stabilizing as evidenced by the small changes in your Sphere prescription over time. Your actual astigmatism probably won't change much either, particularly if you learn how to help your ECP get the Cylinder and Axis exactly right.

Please let us know what you decide to do and the results.

C.


Hd 10 May 2015, 21:00

Hi,

I'm 23 from Greece.

I'm shocked, why am I asking this question? Because I thought she put down the "0" (of the 180)

I've 2 previous prescription.

-3.00 -1.75 5

-3.50 -1.00 5

And a previous one

-3.25 -0.5 180

-3.25 -0.5 180

Thank you for your kind answer.


Cactus Jack 10 May 2015, 15:00

hd,

It would also be helpful to know where you live, the age of the patient, optical history, and the general source of the prescription. Some ECPs and Optical Chains have a reputation of giving a patient a prescription that is "almost" right, in an attempt to make sure the ECP or Chain supplies the glasses. If you use the prescription to order glasses on line, the results will not be very good. If challenged, they will claim it was an innocent mistake, like adding a Zero or leaving a Zero off. Another ploy is to enter a + instead of a - on the Cylinder or vice versa. Cylinder and Axis can be written as either + Cylinder or - Cylinder depending on the ECPs preference during the exam. Unless you understand how all this works, it is very hard to tell a good prescription from a bad one. The best clue is the optical history of the patient and the reputation of the ECP.

There is an easily learned procedure for "fine tuning" the Axis of the Cylinder correction, but you have to make a deal with the ECP prior to the exam. Most reputable ECPs are delighted to have the patient actively participate in the exam, where it is appropriate. Let me know if you are interested.

I urge you to NOT order any glasses with either of those prescriptions until we are sure of which is accurate.

C.


Cactus Jack 10 May 2015, 14:34

hd,

There are several parts to a glasses prescription. They are listed pretty much in order of importance. Traditionally, the numbers are:

Sphere, Cylinder, Axis (Cylinder and Axis always go together), Prism (if any), and Add (for multifocal lenses). There may also be some special instructions listed.

The two prescriptions are identical except for the Axis (3rd number) of the Cylinder correction for Astigmatism. It is very likely that the Axis number in one of the prescriptions is wrong and the wrong one would be very uncomfortable to wear.

The Axis number is the direction of the LONG axis of the Cylinder component. By Tradition, 0 degrees and 180 degrees (the same Axis) is Horizontal. The numbers increase in a counter-clockwise direction as you look at the patient. 90 degrees is Vertical. Generally, ECPs will use Axis numbers from 0 to 179 or 1 to 180, but never more than 180 degrees.

The problem is that we cannot tell which one is right, by just looking at it. A lens maker would probably accept either prescription and make the glasses, but only one would be wearable.

Typically, Cylinder and Axis correction changes very slowly, but unfortunately, the skill of the patient is very important when determining the actual Axis of the Cylinder. Most changes in Cylinder and Axis are caused by lack of skill on the part of the patient than by actual changes. If you have an older prescription or two, it would be most interesting to compare the axis on the older ones and the newer ones.

C.


hd 10 May 2015, 13:34

Hi,

is this 2 prescriptions are similiar?

-3.00 -1.75 18

-3.75 .1.25 18

and

-3.00 -1.75 180

-3.75 -1.25 180

i just need to know if the SPH matters.

thanks,


hd 10 May 2015, 13:34

Hi,

is this 2 prescriptions are similiar?

-3.00 -1.75 18

-3.75 .1.25 18

and

-3.00 -1.75 180

-3.75 -1.25 180

i just need to know if the SPH matters.

thanks,


Galileo 10 May 2015, 11:00

@CJ - IBM Selectric? you really are speaking Old English :) I was a user of IBM DisplayWrite so I can converse with you. You would need a strong add to read the quality of print that the latter produced (trying to make some vaguely on topic reference). Try Bill Bryson's Mother Tongue for some really old English.


Cactus Jack 10 May 2015, 10:20

Galileo,

Thanks for not being too critical. I have enough trouble with New English to even consider giving Old English a try. I have a lot of trouble with typos in ANY language.

When you combine old, twitchy fingers and an ultra sensitive keyboard, you are in a lot of trouble. I often long for a keyboard with the feel of IBM Selectric Typewriter. They were great.

I was and am typing on an Apple keyboard that is stylishly beautiful, but does not "feel" very good. Very sensitive and very short key travel. It is incredibly easy to get your fingers positioned wrong, particularly when you are tired. To tired to carefully read what you have written before you post it.

C.

Curt,

I would wear them full time also, but I like seeing very well and am almost completely unaffected by VANITY.

C.


Curt 10 May 2015, 07:29

With that much astigmatism, I would probably wear them full time...


Galileo 10 May 2015, 00:19

@CJ - I just thought you had switched to using old English


Jimbo 09 May 2015, 13:55

Thanks, She picks up her new glasses this week


Cactus Jack 09 May 2015, 13:12

Jimbo,

Oops, first word in my previous post should have been 'Either'

C.


Cactus Jack 09 May 2015, 13:10

Jimbo,

Wither you did not read my answer to your question or did not understand it, which is my fault so I'll try again.

Your gf prrobably SHOULD wear her glasses full time, but she probably WILL NOT. It deoends on two things, VANITY and her visual needs. If vanity is a factor, it will be a serious mistake to say anything to her about it. At 38, time is on your side and the best thing you can do is nothing and let nature take its course.

Be patient and supportive of her decisions. If she gets some new glasses with different frames, be sure and tell here how nice she looks with her glasses.

C.


Jimbo 08 May 2015, 22:26

My gf just got new glasses prescription R +1.25 -1.50 93 L +1.00 -1.50 84. Is that a full-time type script? She's only worn her old glasses every once in a while but I don't know her old script. She's 38yo.


Cactus Jack 08 May 2015, 22:16

Jimbo,

Yes, primarily because of the Astigmatism as indicated by the 2nd and 3rd numbers for each eye. The 1st number in her prescription indicates mild Hyperopia or Far Sightedness and she could likely compensate some for that, if she had no Astigmatism.

Astigmatism is caused by uneven curvature of the front surface of the cornea and unfortunately it affects clarity of vision at all distances and typically makes it hard to read small text. She might be able to use the glasses primarily for reading, but if she drives, signs might be hard to read at any distance. There is no way to compensate for Astigmatism except by using external lenses. There are Contact Lenses made for correcting Astigmatism called Toric Lenses, but they are expensive and hard to fit. Glasses are best for correcting Astigmatism.

C.


Jimbo 08 May 2015, 21:15

My gf just got new glasses prescription R +1.25 -1.50 93 L +1.00 -1.50 84. Is that a full-time type script? She's only worn her old glasses every once in a while but I don't know her old script. She's 38yo.


EyeTri 22 Apr 2015, 06:19

Question,

I've read that Kava can provide the desired relaxation. I've never used Kava, but it might be worth a try.


Question 22 Apr 2015, 00:03

I understand that self hypnosis is your thing, but since there is no practical evidence of this working, does anyone have any other suggestions?


Daland 21 Apr 2015, 12:53

Question-

Yes, there is a technique, to eelax the eyes.

Use self hypnosis or as we say in German: "Autogenes Training".

Please read the Induced Myopia Thread for further information.

There I wrote something about inducing more tension ibto the eye, but relaxing the eye is physiological, like the whole body relaxes during the procedure.

Greetings

Daland


Dave 21 Apr 2015, 12:15

Jack --

I have several friends who developed myopia in their early thirties which started low and ended up in the -3s. Another experienced the same phenomenon when he turned 40. All of them do lots of close work and attribute their myopia to that fact.

That said, you might stabilize or slightly enhance your current eyesight by doing work that doesn't require being hunched over a computer. But it probably would take a long time and the likelihood of getting back to 20/20 unaided probably isn't going to happen.


question 21 Apr 2015, 11:08

In order to reverse pseudo myopia faster, would you be able to get prescribed dilation drops for a certain amount of time? I'm having really bad headaches and Im certain I have latent hyperopia due to both my parents prescriptions. Is there any known techniques to help relax the eyes on a daily basis?


Jack 21 Apr 2015, 02:49

Thanks for the information Cactus Jack and LikeLenses - it's very useful and explains a lot. Do you reckon my eyesight would return to normal if I worked in a profession where I didn't need computers??


Likelenses 20 Apr 2015, 22:02

Jack

Cactus Jack has a good point,but there is another possibility,and that is you may have acquired adult onset myopia.

It is now becoming quite common for adults to begin becoming myopic,because of the visual demands of the workplace.

The fact that you have become quite myopic in a rather short time span makes me believe that adult onset myopia is what is happening.If in the next year or so you are wearing minus 4.00,or more,then I would say that is the reason.


Cactus Jack 20 Apr 2015, 16:05

Jack,

I would almost be willing to bet that you have developed some Pseudo Myopia. There are really two types of Myopia. Axial or True Myopia and Pseudo or False Myopia. Both have the same ultimate effects on your vision and both have the same correction, minus lenses. All that is different is their causes.

Axial or True Myopia is caused by a mismatch between the total power of your eye's lens system and the distance from the back of the eye's lens system to the retina. Generally, it occurs because the eyeball has grown too long in childhood or teens.

Pseudo Myopia occurs when the Ciliary Muscles and Crystalline Lenses cannot fully relax after extended hours of close focusing. Physiologically, it is exactly the same optical phenomenon as Latent Hyperopia where the Ciliary Muscles and Crystalline Lenses get so used to adding PLUS to focus close that they have difficulty relaxing and just keep the extra PLUS in if you need it or not.

Unfortunately, both Pseudo Myopia and Latent Hyperopia can take weeks of months to resolve even after the focusing work load has been eliminated or reduced by bifocals, trifocals or progressives. As you may suspect from the last sentence, Presbyopia can play a role in how long it takes for the crystalline lenses to fully relax.

What you are experiencing is not unusual when you get to your mid to late 30s and are doing a lot of close work.

Let us know if you have more questions.

C.


Soundmanpt 20 Apr 2015, 15:20

Dad of Young Girls

I agree with DS. Your younger daughter has a little more need for her glasses but because she is so young she probably can still function very well without her glasses. She will probably start wearing them more if she feels she needs them or if she starts getting headaches. If she ever complains about having a headache then you may suggest to her that she probably needs to wear her glasses, otherwise I would leave her decide when she needs them. She isn't doing any harm to her eyes. The older daughter really has a very weak prescription which many doctors probably would let the patient decide if they wanted glasses or not. Pretty much sounds like she wanted glasses since she has been wearing them full time since she got them. Wearing glasses is now very popular for young girls these days. She should be able to see nearly perfect without them. Once again she is not doing any harm by wearing her glasses full time, they are even too weak to cause any real dependency. As you probably know chances are they both will be getting stronger glasses in the coming years. Also I think by the older one wearing her glasses full time it won't be long before the younger one decides she wants to wear hers all the time as well.


DS 20 Apr 2015, 14:56

DoYG,

My advice is "no advice." Since both girls have relatively equal prescriptions for the left and right eyes and because the prescriptions aren't particularly strong, there's no harm from not wearing correction. Personal preference rules.

The prescription in your older daughter's glasses is very slight. She's probably not wearing them for the better vision.

With your younger daughter, the slight astigmatism is the most noticeable part of the prescription to her young eyes. At her age she doesn't require the finest of details that correcting the astigmatism reveals. Only if she complains of headaches or you are noticing an eye turn when she isn't wearing her glasses would I push her to wear them. But with a spherical equivalent of less than +1D, I doubt this will be a problem.


Dad of young girls 20 Apr 2015, 10:11

My 2 daughters (ages 8 and 5) recently had an eye exam and were both prescribed glasses. This was no surprise to me as I have been wearing glasses full-time since I was 8. My youngest was prescribed R+1.25 -0.75 L+1.25 -0.75 and my older daughter R-0.50 L-0.25. My older daughter put hers on the first day and hasn't taken them off since. My younger daughter wears them at school, and that's pretty much it. Any advice on when they should be wearing them?


Jack 20 Apr 2015, 09:08

Hello, I'm a 38-year-old male and I'm just wondering - how common/ unusual is myopia progression in your 30s?

Since turning 30 I've gone from not needing specs at all (-0.5) to a full-time wearer (-3 at my eye exam last week).

Here's my glasses history. Any idea what is causing these leaps in prescription (I'm sat at a computer all day for my job - maybe it's that)? Should I be concerned? My optician didn't have any clear answers...

Dec 2006 (29) -0.5

Sep 2008 (31) -0.75

April 2010 (33) -1.5

July 2011 (34) -2

Oct 2012 (35) -2.5

April 2015 (38) -3

Thank you!


lazysiow 15 Apr 2015, 19:24

I dont get headacbhes but since I have worsening astimatism in one eye while the other eye seems to actually be getting better, I have to wear my glasses more than before since eventually the eyestrain makes me sleepier. On bad days my worse eye gets extremely scratchy and teary


Soundmanpt 11 Apr 2015, 08:40

Katie

Always great to see someone new come aboard. However if you don't mind to avoid confusion you may want to add to or change from "Katie" as we already have one Katie in here. If you look you will see her in the "New Glasses" thread.

How often you choose to wear your glasses or not wear your glasses is totally up to you. There is no "glasses police" so if you feel your able to see well enough without your glasses then do it, but never base it on feeling as if your glasses are hardly necessary and you don't deserve to be wearing them. Actually you probably need your glasses more than you think you do. Your eyes are a little bit nearsighted which I am sure your aware of. Your right eye being more nearsighted then the left. But you also have something called "astigmatisms" in both eyes. I'm not sure if you know what astigmatisms are or how they effect your vision? Astigmatisms effects your vision at all distances so it cause your eyes to be slightly more nearsighted and even effects your vision for seeing things close up. I have friend that used to cut my hair, which is nearly gone now, and her prescription was the same as yours only she didn't have the -1.00 -.25. In other words she wasn't even nearsighted, but she was told that she not only needed glasses but that she should wear them full time. In her case she was getting headaches every afternoon and was unsure why. Her MD suggested that it might be her eyes. She was totally shocked that she had to start wearing glasses when she could see just fine. But she quickly found that by wearing the glasses she didn't have anymore problems with headaches. So I am not at all surprised that you find seeing things at night such as driving much harder. Your prescription shows that your right eye would not come close to passing the drivers vision test. So if you were able to pass it, you only barely passed. Honestly since you seemed to indicate that you you haven;t had your eyes examined recently you really should be wearing your glasses anytime you drive now for the safety of others as well as yourself.

Remember know one has any idea how much you need your glasses. When your looking at your friends that wear glasses I doubt that your able to tell how strong their glasses are unless you try them. You know if it has been more than ay ear since you got your glasses your due to get get them checked again and don't be surprised at needing an increases as well.

Hope this helped somewhat. And again welcome.


Cactus Jack 11 Apr 2015, 08:18

Katie,

That is a frequently asked question. Stated in other words: “How bad must my vision be for other people to approve of my wearing vision correction”? The answer is that no other person on this planet really has any idea of what you actually see. Even Eye Care Professionals (ECPs) don’t really know. With training, they can guess by looking into your eyes with various instruments, but in the final analysis they have to depend on what you tell them as you describe what you are seeing during an exam. Part of the problem is that Vision actually occurs in the Brain. You eyes are merely biological cameras. The brain has the amazing ability to correct a blurry image if it knows what you are actually looking at. In fact, the brain can produce images without any input from your eyes. Ever had a dream? The problem with the image correction process is that it takes a lot of energy and processing power that could be better used for other things.

Lets take a moment and analyze what your prescription means.

The 1st number in your prescription is the Sphere correction. You are a bit more nearsighted (myopic) in your Right eye (OD) than you are in your Left (OS). If it were not for your Astigmatism (the Cylinder, 2nd number, and Axis number,3rd number) you almost have natural mono vision where you use your Right eye for focusing close and your Left eye for distance. Mono vision works well for many people and often good mono vision is the objective of their vision correction. The thing about Astigmatism is that is messes up your vision at all distances, particularly for reading small text and seeing small things like leaves on trees, stars in the sky, or peoples faces across the street.

The -1.00 Sphere in your Right eye means that every thing beyond 1 meter (about 40 inches) is increasingly blurry. and the -0.75 Cylinder just makes it worse, even up close. The -0.25 in your Left eye means that everything beyond 4 meters (about 13.5 feet) is fuzzy and again the -0.75 Cylinder makes it even more fuzzy at all distances. Given a choice between two images, your brain will always select the sharpest image as its primary source of visual data and use whatever information it can from the other eye to augment it. If you are satisfied with blurry vision and have no need for good vision (such as driving), and don’t mind annoying other people by asking them to read something for you, don’t bother with glasses or contacts. However, don’t think for a nanosecond (a billionth of a second) that other people don’t notice that you don’t see very well without glasses or contacts. They frankly just put up with you and don’t say anything because they are being nice. I can assure you that other people notice your vanity, but don’t tell you what they are really thinking.

If you don’t mind being a nuisance to other people, that is up to you. That is what other people are for, to read bus signs, menu boards, and identify distant things while you live in blissful ignorance. It makes them feel good, just knowing that they helped a person in need. They don’t know that it is really vanity at work, Right?

Is your vision worth bothering correcting? I would say YES, but I am not you. If you like living in a small world, that is your preference. If you have no need to see well, for the safety of others, such as driving, then it is your choice,

Some years ago, I “invented” the Ministry of Vision and posted it around April 1st of that year. Its job was to assist people who wanted official approval to wear vision correction. It was particularly suited for the UK and would work in a similar way to the licensing or radio and television receivers. If it worked well in the UK and raised enough money, other countries could adopt it as another way to increase tax revenue. For example, glasses temples would be large enough to inscribe the license number on them so others would know that your vision correction was approved by some bureaucrats and that you had paid your license fees (vision tax). The problem was that there was no way to post the license number for contact lenses. Perhaps a visible tattoo of their contact lens license number on their forehead would let others and the Vision Police know that they were not cheating. That would leave open the question of what to do about people who really had excellent vision and did not need any vision correction. The only “fair” thing would be to tax them also and use the funds to buy glasses for people who really needed them, but could not afford them. They would also need a tattoo to show that they had paid their “fair share” of the cost of maintaining the bureaucracy and were not cheating.

The proposed location of the offices for the Ministry of Vision was in the same building as the Ministry of Magic.

C.


Katie 11 Apr 2015, 02:53

Hey guys,

I have been cruising around the board for a bit and thought I'd run something past you, as you guys seem to know your stuff! Haha.

So, when I was in undergrad at college I occasionally wore glasses to be able to see in lecture halls, blackboard in class etc, however I was pretty inconsistent as I wasn't a fan of wearing them. In the past few years I have worn contacts very intermittently (just disposable dailies for when I feel like I will be in a situation that requires having super clear vision i.e. driving in unknown places, meetings etc) - I feel like my prescription numbers are pretty tiny compared to people who 'need' glasses, so I almost feel dumb ordering contacts or glasses, yet I find things like driving at night or reading things in the distance to be pretty difficult sometimes. But maybe it's just me being overly picky?

My most recent (couple of years ago) prescription was:

OD -1.00 -0.75 x100

OS -0.25 -0.75 x100

Is this something that I should actually be bothering with, or is my prescription too minimal to actually worry about? Cheers :)


Roy 27 Mar 2015, 02:27

Cactus

Thanks for your reply. I live about 30 miles west of London in the UK.


Cactus Jack 26 Mar 2015, 13:31

Roy,

Yes. You PD needs to be reduced for BO prism correction by about 0.25 to 0.30 mm per prism diopter. The actual amount depends on the a couple of factors. Apparently, your dispensing Optician know what he/she is doing when fitting prism. Very few know how and getting the PD right can make a big difference in VA with the glasses. May I ask where you live?

C.


Roy 26 Mar 2015, 11:18

A bit less sphere but a bit more base-out prism. Here is my new prescription:-

Right eye: -1.75 sph, -1.00 cyl @88 degrees, prism 3 down & 11 out

Left eye: -4.50 sph, -0.50 cyl @85 degrees, prism 2 up & 11 out

Add 2.75

I was told that the lens makers re-distribute the prism between the lenses to compensate for the difference in myopia between my eyes (i.e. put more in the right eye and less in the left). This equalises the lens thicknesses, with the total base-out prism still adding up to 22 dioptres.

I had the prescription (in progressives) fitted to one of my pairs of frames I really like (silver titanium). Maximum outer edge thickness is about 12.7mm (1/2 inch) even with 1.67 index lenses. Luckily I don't mind this. Vision is really good at all distances with no double-vision.

Interestingly the dispensing optician measured my PD when wearing glasses, rather than bare-eyed as normally happens. I queried this and and was told that my eyes need to look through the optical centres when they turn in (as they always do). This reduced my PD from around 69 to 63.5mm.

Cactus - is this what you mean by compensating for the prisms in the PD measurement.

In any event it certainly worked. My vision is really good at all distances with no trace of double-vision.

These are the best glasses I have had in along time.


Rex 10 Mar 2015, 16:48

Edina

I see your glasses are the same as I first had. You will notice the difference especially at dusk/night. Are you wearing glasses much? I tried not to but a couple of years later my eyes got worse and am now resisting fulltime wear!


Cactus Jack 17 Feb 2015, 21:45

Michael_Ireland,

You probably won't notice much difference with the computer except on small text. Recall that I mentioned that your refractive error is almost ideal for focusing on a computer display. If your display is at say 66 cm or 26 inches and you had no refractive error, your ciliary muscles and crystalline lenses would have to add +1.50 diopters to focus clearly on the display. Because you have -1.00 of Sphere myopia without your glasses, your eyes have +1.00 of sphere built in and your ciliary muscles and crystalline lenses can easily supply the extra +0.50. With your glasses the ciliary muscles and crystalline lenses have to supply the full +1.50 for you to see the computer display clearly. At 32, that is easily done without much notice by you, however that will change as you get older.

Where you may notice a glasses improvement is when you need to read very small text. While you don't have much astigmatism, it still messes up your vision at all distances and there is nothing you can do about it, except wear glasses. With your glasses you may notice that you are less fatigued when working at the computer for long periods or you may find that it is more comfortable to not wear your glasses while using the computer. Everyone is different.

My suggestion is to wear your glasses full time for about 2 weeks to let your brain become accustomed to working with clear, sharp images and then make a decision about when to wear them. The key is comfort and convenience. Wearing your glasses full time has a couple of benefits:

1. You won't mislay or loose your glasses, if you are wearing time.

2. It is unlikely that you will sit on them and break them, if they are on you face.

3. You may find that you prefer the crisp vision with your glasses even when using the computer.

Please feel free to ask more questions, if you wish. Also, tell us how your friends and family react to your glasses. We would be particularly interested in any comments from your friends that suspected you needed glasses before now and why.

C.


Michael_Ireland 17 Feb 2015, 16:08

Thanks. I got the glasses today. Wow - I was very surprised with how sharp everything was walking home from the city. I don't notice much difference on the computer. Should I wear them anyway for computer work?


Cactus Jack 16 Feb 2015, 12:38

Michael_Ireland,

Your prescription is almost ideal for a person who works with computers except for your mild astigmatism. It is like you have built in computer glasses. The snag is that it is likely that your ciliary muscles are not getting enough exercise and may become de-conditioned a bit sooner than they otherwise would, which causes the symptoms of early onset of Presbyopia.

You probably should wear your glasses when you are using the computer, but you may notice a bit of fatigue, until your ciliary muscles get used to having to work a bit harder to focus at typical computer display distances.

If you experience that, please let us know.

C.


Soundmanpt 16 Feb 2015, 08:06

Kiki

Just curious how your doing wearing your sisters spare of glasses. I think they were a bit stronger than the glasses you had been wearing without any problem, but now since your sister has some astigmatism even though it isn't much can your eyes feel any difference now with correction for astigmatism in the glasses?


Michael_Ireland 15 Feb 2015, 15:53

Thanks Cactus Jack. I live in Ireland, am 32 and work as a software engineer.

Cool. I guess I should try them and get used to my new status of being a glasses wearer.


cactus jack 14 Feb 2015, 10:51

Michael_Ireland,

First let me welcome you to the group. Your prescription for Myopia (nearsightedness) has two parts. The first number, the Sphere correction of -1.00, means that you probably see things that are 1 meter (about 40 inches) or closer pretty well, but beyond 1 meter objects, signs, faces, trees will be blurry. The second and third numbers (they always go together) are the Cylinder and Axis correction for Astigmatism. -0.25 is pretty low, but Astigmatism messes with your vision at all distances. It is particularly noticeable and fatiguing when you read small print. The Axis of 90 degrees indicates the direction of the long axis of the cylinder part of your prescription. By convention 0 degrees is horizontal and 90 degrees is vertical. The numbers increase from 0 counter clockwise, as the examiner looks at the patient, through 90 degrees to 179 or 180 degrees (horizontal again).

Bright light helps you overcome your myopia because your pupils close down in bright light and increase your range of useful focus, just like the lens on a professional camera. In dim light, your pupils open up to let in more light and your myopia becomes more apparent.

When you get your glasses, I thing you will be very pleasantly surprised at how vivid colors are and how sharp everything is. Signs and people across the street are recognizable. Trees have leaves (maybe not yet, but soon), and if you go out at nigh where there is not too much ambient light, you will see that there are stars in the sky, not just the moon.

I would suggest that you wear your glasses full time for about 2 weeks and then make the decision about when to wear them. Vision actually occurs in the brain. The eyes are merely biological cameras. The brain has the amazing ability to correct blurry images, IF it knows what something is supposed to look like. However, it takes a lot of work and energy. When you wear your glasses, the image correction work is done optically, by your glasses, and your brain can do other, more important things. This may cause you to think that glasses have made your vision worse, but that is not true. If you don't believe that vision occurs in the brain, your brain can even create images with your eyes closed. Ever had a dream?

If, after the two weeks, you decide to only wear your glasses part time, you should alway wear your glasses when you drive and definitely wear them at night and to the cinema.

May I ask a few questions?

Where you live?

Your age?

Your occupation?

Again, welcome. Please let us know what you decide to do and feel free to ask any other questions you may have. Remember, glasses are just tools that help you see better. You can drive a nail with your hands, but it is a lot faster and less painful if you use a hammer.

If you are concerned about what others will say, don't be. Questions about your glasses only last for a day or two and from then on, no comments or care for that matter. Remember, you do not wear vision correction for the benefit of others (maybe it is beneficial for others if you wear them when you drive) and you don't need anyone's permission or approval to see well.

C.


Michael_Ireland 14 Feb 2015, 08:53

Hi

I got my eyes tested today and found out that I'm slightly nearsignted. My prescritpion is -1 -0.25 90 in both eyes. The optician said it is up to me on whether I get glasses or not. If I was a driver he said I should wear them driving at night. Will I notice much a difference if I get them? The chart certainly looked much clearer, but I currently manage fine without.

M


Crystal Veil 28 Jan 2015, 00:15

Ellie,

Zenni does not make bifocal or progressive lenses above -10 but there is a cheap and easy alternative. Four years ago, I ordered a lovely pair of Zenni glasses (1.67 lenses) for my partner Nel who had a prescription of -11, and then ordered +2.50 bifocal segments from stickonlens. It's a bit of precision work as you have to cut the segments to the proper size and shape. The stickon lenses can easily be removed if you need their position adjusted. You may consider buying the same Zenni glasses again and then transform them into bifocals. It's more comfortable than changing glasses all the time or using OTC readers over your own glasses. After four years, the stickon lenses on Nel's Zenni glasses are still in position. If you are interested to see what the glasses look like, I can post some pictures.


Cactus Jack 27 Jan 2015, 19:09

Ellie,

I don't believe the distance between your regular glasses and the OTC readers is enough to make much difference in the effective power of the +2.75 lenses. I would suggest ordering some bifocals or progressives with a +2.75 ADD. Order a pair with cheap frames to see if you like them before committing to a pair with a nice frame. If you decide that you want to order some prescription readers, subtract 2.75 from your Sphere value in each lens. For example, if the Sphere prescription in the Left eye is -14.50 the prescription reading glasses prescription would be -11.75. Do not tinker with the Cylinder or Axis. They need to be the exact same values as in your distance prescription.

C.


Ellie 27 Jan 2015, 18:49

Hi all,

I received my new glasses from Zenni about three or four weeks ago and have been wearing them every day (I love them!!).

I had posted earlier about having a hard time reading small print with my older glasses, which had an rx of -13/-14ish in them. My new ones have a -14/-15ish rx. I recently started wearing a pair of OTC readers with +2.75 rx over my glasses while studying in my room to see if reading on my phone and reading my books is a little better.

I'm noticing that print appears bigger, which is helpful especially on my phone. I can read my textbook just fine with my regular glasses but I guess the slightly larger print is helpful as well.

I was wondering if I were to get an add in my glasses how strong the add would be, just based on the fact that I'm trying out the +2.75 reading glasses over my regular ones. The +2.75 reading glasses are positioned approximately 8mm-1cm away from my regular glasses. Just curious, how strong of an add would this translate to?

Thanks!


aubrac 03 Jan 2015, 01:57

Mars

My wife at age 38 had her first glasses (apart from wearing them as a child).

She did not wear them full time at first but did say her vision was better,and described it as though "someone had cleaned a dirty window".

Reading small print was easier and she could see the board at her evening classes much better.

You may find, like her, a prescription increase, two in her case, was needed during the following 18 months. This was not a case of glasses making her eyes worse but simply the eye muscles not having to work so hard, and giving better and more relaxed vision with her actual level of hyperopia.

Everyone is different and suggest you wear glasses full-time for a couple of weeks and see if you do benefit from clearer and more relaxed vision.


Julian 03 Jan 2015, 01:31

Honestly Mars, your eye doctor's 'very vague' advice is sound and accurate. You can wear your glasses as much or as little as you like. If you have a headache or difficulty in focusing, put them on and keep them on till it eases. Why did you go for a test? And how old are you?


iamhacked 02 Jan 2015, 20:16

OD SPH: -1.00 CYL: -2.25 AXIS 012

OS SPH: -2.25 CYL: -2.00 AXIS 178

My doctor told me that it's only a small increase so getting new glasses is optional. How do I get contacts with this prescription?


Mars 21 Dec 2014, 13:36

I just went to an eye doctor and got a prescription for glasses. Even after asking the doctor when I should wear my glasses I am still confused. The answer was very vague. "You'll notice a difference when watching tv... You can wear them all the time if you think it helps."

I've had people tell me if inquest glasses more my eyes will adjust and weaken. My prescription was "distance R/L +.75 sph

When should I wear my glasses and how often?

Thanks!


Soundmanpt 08 Dec 2014, 15:05

edina

You don't need permission to wear glasses no matter how weak or how string they maybe. Yes, your prescription isn't all that strong but i'm pretty sure after you have them on a little while not only can you see better but when you take them off things don't look nearly as clear and sharp and in the distance even worse. The thing is the average person has no idea about glasses prescriptions as to how much you need your glasses or don't need your glasses. If your comfortable and like wearing them then by all means wear them as you choose to, not based on what you think someone may think you don't need to be wearing them.

Also consider this, have you not noticed that many of the boutiques stores now sell very nice looking fake glasses. They sell them because so may young ladies now consider wearing glasses a fashion statement. At least if anyone asks to try your glasses they will be able to tell your glasses aren't fake. Don't be surprised that some of your friends may even find they can even see better with tour glasses. Trying someone else's glasses is often how many discover they need glasses themselves.


edina 08 Dec 2014, 13:52

Recently been prescribed glasses.

Sph-.75 cyl -.25 axis15 left eye

Sph-.75 ds right eye

Is it OK to wear this prescription all the time or will people think I'm being pathetic wearing such a low prescriprion


Daniela 01 Dec 2014, 14:54

Thank you everyone!

Yes, it's very good to have the add of 1.5. Maybe I need 2.0, but I will see how this works for me.

My friend and I we really love our glasses. Also he doesnt really need glasses. His normal vision is +-0.00.

The best part is, if we take down both our glasses and see each other in total blurry.

Good night

Daniela


Barts 01 Dec 2014, 03:32

In my opionion is pretty obvious that weaker glasses for close vision slow down the progression. And I can't really understand why certain eyedoctors don't do that if they want to preserve patients' eyesight. Maybe those who don't know their job very well.


Likelenses 01 Dec 2014, 01:22

Daniela

Some eye doctors believe that bifocals for a young person with high myopia can slow down the progression.


Cactus Jack 30 Nov 2014, 22:49

Daniela,

Welcome. Thank you for sharing your prescription information with us. You are indeed fortunate to have a boyfriend who understands what it is like to wear a strong prescription. The add of +1.50 is a good idea to reduce the minification caused by the Vertex Distance (VD) of your glasses. Hopefully, that will help you read small text. If you need more help reading small text, we may be able to offer some other suggestions.

May I ask if you are still in school or your occupation?

Again, welcome.

C.


Daniela 30 Nov 2014, 15:30

Hello Everyone!

I'm Daniela and I am new here.

I am 21 years old and come from Germany.

My prescription is

R -15.5 -2.5 170 +1.5

L -18.0 -2.0 178 +1.5

so this is really bad.

I got a boyfried who likes glasses very much and does "GOC" with -15 to -20 glasses often. I like this also very much, as we cant see each other without our glasses.

I dont know myself without glasses on my nose. New is for me, that I got the magnifying part (+1.5) in the lower part of my lens, because everything is so minified and I am not able to see letters of books in front of me.

I am looking forward to reading here interesting posts and I will ask my boyfried to visit these pages, too.


Trent 11 Nov 2014, 18:03

Had my yearly eye exam today results are:

-8.00, -2.50, 008

-8.00, -2.50, 164

Add +2.25

Sphere went down a bit and add stayed the same. The big change was the Axis difference from the past two years. I'm not sure what the other optometrist was measuring.


Jacktus Cack 06 Oct 2014, 15:34

Perchance we shall continue this semantic discussion at Kornbleet University.

JC


Cactus Jack 06 Oct 2014, 08:31

I would like to suggest that our language discussion should be moved to another venue. I don't think is it appropriate as an ES topic. Any suggestions?

C.


SC 06 Oct 2014, 02:29

Minus5, CJ

As I said UK English is inconsitent - makes it really difficult to be perfect. US English is much more standard - words end in 'er' (not 're'), 'or' (not 'our') or 'ize' (not 'ise') whereas we have examples of all types.

Even in Eyescene terms - I see you often use 'near-sighted' whereas the common term here is 'short-sighted' and the converse is 'long-sighted'


minus5wholuvsgwgs 03 Oct 2014, 05:36

not relevant but much American spelling etc relates to what was used by English settlers in the 17th and 18th centuries


Cactus Jack 03 Oct 2014, 04:43

SC,

Thank you. I don't want to mislead or discourage Dude, he writes extremely well for a non-native English speaker.

Math or Maths is, of course, a contraction of the word Mathematics which covers a multitude of mathematical disciplines. Maths (plural?) just sounds strange to my ear as I am sure Math sounds strange to yours.

"The United States and Great Britain are two countries separated by a common language" is a quote attributed to George Bernard Shaw and it is true. I believe he capitalized on the differences in English, even within England, in his play Pygmalion and its adaptation as "My Fair Lady". He also offered a friendly "jab" at North Americans, where Professor Higgins commented (to paraphrase) that English has not been spoken in America, for years.

Actually, I speak Texan, so I have to be very careful advising others about English, because I am anything but an authority.

C.


SC 03 Oct 2014, 03:44

CJ/Dude

"Maths" is indeed correct - that is how it is written and pronounced in the UK & Commonwealth. For some reason the US spelling is different, like centre, colour, aluminium, harbour, neighbour, emphasise etc. UK English is wonderfully inconsistent so maybe US tried to standardise (another one)

Sorry to interrupt your conversation...


Cactus Jack 02 Oct 2014, 18:54

No name,

I am not sure what the W: means exactly, but I am pretty sure the AR: means Auto-Refractor.

I suspect the W: are the results of the manual refraction using either a Phoropter or a Trial Lens set.

Actually, there is not much optical difference between the two. Auto-Refractors typically only approximate your prescription and are primarily used to save the Examiner time by providing a starting place for the refraction part of the exam.

In reality, the examiner has no way to know what you see or what your preferences are, other than what you tell him/her about what you see.

The results of the manual refraction are considered to be the most accurate.

The most subjective part of the exam is determining the cylinder and axis to correct astigmatism. I urge you to review some of my recent post on the Astigmatism thread to learn how to improve the accuracy of your cylinder and axis prescription at your next eye exam.

C,


Cactus jack 02 Oct 2014, 18:42

Dude,

A small correction. Math is one of those strange English words that are both singular and plural. You don't need an 's' to mean more than one area of Mathematics.

Rather than referring to optical terms as 'slang', it think it would be better to think of it as the language of optical physics. Almost every field of science and many non-science fields have their own language. Usually, learning the language of a field is the hardest part of leaning about the field. Sometimes the language of a field is referred to as the 'jargon' of the field and it is not considered as pejorative as the word 'slang'.

It sounds like you really enjoy learning and have discovered that you don't have to wait until you take a class in school to learn about a subject. Hopefully, at some point, you will have the opportunity to help some one who is having difficulty in a subject, understand it. Believe it or not, the very best way to learn a subject is to teach it.

To give you a personal story, I think I mentioned that I am 77, but I became fascinated by electronics when I was about 10. In those days, there were no transistors, integrated circuits, or microprocessors. There were only Vacuum Tubes, which I still think are easier to understand than semiconductors. I doubt if you have ever seen a Vacuum Tube. If you can, look up Lee DeForest he invented the first triode (3 element vacuum tube) which was capable of amplifying tiny electrical signals.

By the time I was a senior in high school, I had become somewhat expert in working with electronics. In my senior year, I took Physics and found it fascinating also, but when we go to the Electricity part of physics, the new physics teacher (it was his first year out of university) was having trouble explaining some of the concepts. I has a reputation around the school of having built my own equipment and he asked me to help explain some of the concepts to the class. Fortunately, I had taken a class in Public Speaking and I was not particularly bothered by speaking to a group. Anyway, I dug in and stayed about 5 pages ahead of the class. It turned out that I was able to help the class understand the mysteries of electricity and the class and the teacher seemed to appreciate my explanations.

As you can probably tell, I enjoy teaching and I take great joy in seeing the "light come on" in a student's eyes as he realizes that he now UNDERSTANDS how something works.

Should you ever like to discuss anything that is not Eyescene related, please feel free to contact me at cactusjack1928@hotmail.com

C.


Dude 02 Oct 2014, 16:05

Cactus Jack

Yes, I do like maths and science subjects at school, I also like physics, that's why it was easy to me to understand the meaning of a diopter, or myopia, or refractive index and all that optics slang. I also thank you for praising me, it is important to me the fact that an american English native speaker thinks that my English is ok.


 02 Oct 2014, 11:39

Can anyone explain to me what this prescription means? I know the basics like od, os, and what the prescription means, but I can't figure out what the AR and the W mean and why there is such a big difference in prescriptions. Thanks:

W:

OD -.5 +.5 x51

OS -.5 +.25 x130

AR:

OD -.25 +25 x19

OS -.25 +.5 x124


Cactus Jack 02 Oct 2014, 08:42

Dude,

It sounds like she is very sensitive to bright light and it is likely that it may be caused by an eye disease.

Here on Eyescene, we mostly concern ourselves with problems associated with optical refraction, but there are many other factors that can affect vision. Many of these problems are associated with the retina. Macular degeneration, Retinitis Pigmentosa, and Uveitis just to mention three. Most of retinal diseases are inherited, are difficult to treat, and often lead to blindness or very low vision. A person can have both retinal problems and refraction issues. Hopefully, she is under the care of an ophthalmologist who specializes in treating eye diseases.

English: A very well written post. I think 'mistake', in the first sentence, should be 'mistakes' (plural) because the word 'any' implies more than one. If you had said 'If I make a mistake, . . ', the 'a' would make it singular and would have also been correct. I am amazed at your writing skills. I make plenty of English mistakes, myself, so I really don't have much room to be critical of others.

Do you like math and science subjects in school?

C.


Dude 01 Oct 2014, 16:17

Cactus Jack,

If I make any mistake, please tell me.

About my teacher's glasses, she wears them also to go outside, thus if she walks to the bus parade at noon, she would wear them, and she takes her glasses off, because she seems to be annoyed by the darkness her glasses create, but she quickly gets a headache or so, so she has to put them back, it is like vicious circle.

Also, it is hard to me to see the cut-in because her glasses are so dark that I can barely see her eyes.


Cactus Jack 30 Sep 2014, 22:38

Dude,

You should avoid using a translation program, if you can. You seem to do very well, writing English. The big secret to reading, writing and speaking another language is practice. If I notice a mistake, would you like for me to mention it it to you? English is not an easy language to learn because of what are called irregular verbs that just don't follow the same rules for tense (past, present, or future) as regular verbs.

Unfortunately, it is very difficult to answer your questions without more information. Information that would be very difficult to get without asking your teacher, directly.

People wear tinted lenses for a number of reasons. There are some medical conditions that make a person very sensitive to light and sometimes people wear tinted lenses for personal or vanity reasons. A very light tint can reduce the internal reflections in minus lenses and make "power rings" less noticeable, but generally the tint is so slight, that it is difficult to detect. Another possibility is that computer displays are a very un-natural way to read. The eye was designed to look at things using reflected light. Reading a computer display involves looking into a light source, which can cause some people problems. These days, most color graphic displays have a white background with black or colored text and images. Many years ago, when we used monochrome CRT type displays, we often set them up with a black background and either green or white text. It was much easier on the eyes.

I don't have a good answer for why she wears glasses for using the computer, but does not wear them for distance. Astigmatism could be a possibility because it really messes up small text at all distances. Cut-in can be caused by other lens elements besides MINUS sphere. It is possible that she has some prism correction in her glasses and that helps her not see double when she reads. Does she wear her glasses for reading?

C.


Dude 30 Sep 2014, 16:37

Cactus Jack,

I don't use any translation program, I read and write it all by myself, and I have also learned a little bit of the people who post in Eyescene, so sorry if I have mistakes.

I have been curious these days, because my Spanish teacher just got new glasses, they are tinted(as the past ones), I can see a some cut-in but she only wears them when she's at computer and takes them off for looking far, but she seems to see well.

So, why do her glasses are always tinted(before purple and now brown)? What kind of prescription does she have if she doesn't wear her minus correction for far?


Cactus jack 27 Sep 2014, 20:10

Dude,

Mono Vision is not a good idea for young people who have or should have plenty of effortless accommodation range. There is a phenomenon called Presbyopia or "old eyes" where almost everyone looses the ability to focus close as they get older. True Presbyopia occurs when the Crystalline Lenses in your eyes get so stiff that the Ciliary Muscles can no longer increase the PLUS power of the lenses to enable you to focus close. However, there is another way to cause the symptoms of Presbyopia and that can happen to people of any age, even very young, with natural Mono Vision.

With natural Mono Vision, your Ciliary Muscles don't get enough exercise and they become de-conditioned and weak. This makes it seem like they can't focus close, when they should be able to. Also, by not making the eyes work together as a team, the Visual Cortex does not develop properly and many people with Mono Vision cannot see 3-D and have very poor depth perception.

I don't know for sure where you are in your educational adventure, but if you have any interest in science and how things work, I have attached a link to a very good paper on how the eyes work. You may not initially understand all of it, but please read it over and think about what it says.

http://www.lhup.edu/~dsimanek/scenario/labman3/eye.htm

The thing that is not mentioned is the most important formula in optics that was developed by Sir Isaac Newton, of Gravity fame, around 1700. That formula describes the mathematical relationship between the Focal Power of a lens in diopters and the Focal Distance. It is: Focal Distance in Meters = 1 meter / Lens Power in diopters. Of course, lens power and focal distance can be expressed in cm or mm just so the units of measure match.

You need to understand that it is very likely that you will need to wear glasses or have some other forms of vision correction from here on out, and the better you understand vision and how your eyes work will make you better prepared to enjoy the best possible vision. We can teach you a lot, but you have to apply yourself so you understand how this stuff works.

Some of it gets a bit complex, but it is all understandable, provided you want to learn about it.

May I ask about your skills in English. Do you read and write English or are you using a Translation program? The reason I ask is that some translation programs are better than others where technical subjects are involved.

C.


Dude 27 Sep 2014, 17:27

P.D: Is monovision that bad? Please tell more about it


Dude 27 Sep 2014, 17:27

P.D: Is monovision that bad? Please tell more about it


Dude 27 Sep 2014, 17:26

Cactus Jack

I live in Colombia, I got my first glasses when I was 12, glasses caused me the feeling that I can see the same so I did not wear them, I first got glasses because in the school they were doing obligatory eye exams, I felt weird when I noticed my vision was that bad, but I never wore them because I didn't see any difference, this week there was another eye exam so I saw the difference


Cactus Jack 27 Sep 2014, 14:37

Dude,

Welcome to Eyescene. When I was your age, I had a similar prescription, but not quite as much cylinder in my left eye as you do.

First of all it is nothing to get very excited about your vision and there isn't much you can do about it changing over the next few years. You have natural Mono Vision where your right eye (OD) is set for distance and your left eye (OS) is set for focusing close as is indicated by the Sphere (1st number) correction of OD Plano (0.00) and OS -1.75. That is complicated by your astigmatism as indicated by the cylinder correction, the second number. The axis (3rd number) is simply the direction of the long axis of your cylinder correction. 180 degrees is Horizontal.

Vision actually occurs in the brain and the eyes are merely biological cameras. You brain will always select the clearest image and us it as a primary source of visual information. In your situation, it will select your right eye for distance and left eye for close. There are two problems with that. 1. You have quite a bit of astigmatism in your left eye and that messes up your vision at all distances, particularly for reading or using a computer where text is important. Mono Vision, natural or created on purpose, allows your eyes to not work well together.

That is not a big problem for seniors (40+), but it can be a bigger problem for a young person, your age. You should wear your glasses full time.

Based on my experience, you probably do not have very good depth perception. I didn't before I got glasses and that caused two problems. One immediate problem and the other from my early 20s onward (BTW, I'm 77 now).

You did not mention where you live or if you like sports of any kind. I grew up in South Texas and I was never selected to be on a baseball team, because I could not hit or catch a baseball. No one really considered that I might have vision problems because I could see fine (or at least thought I could) in the distance with one eye and had no problem reading with the other, but no one including me, had any realization that my eyes could not work together. My problem was that I could not tell where the baseball was or where it was going until it was too late to hit it or catch it. If we had had soccer in the US in those days, I might have been OK as a goalie, because the ball was being aimed at me and all I would have to do, is prevent it from scoring. Soccer balls move a lot slower than baseballs,

The other problem occurred in my early 20s, in college, and the intense engineering reading load gave me splitting headaches. The cure was to get bifocals and by the time I was 30, I had very strong bifocals for my age and had to get trifocals to focus at intermediate distances.

The point of all this is that you really should wear your glasses full time because they enable your eyes to work together. At first they may be a bit uncomfortable because your eyes may have years of experience in functioning separately, but you need to train them. Hopefully, your vision with your glasses is substantially better than without them. If you have difficulty reading or get headaches, you may have to get a low ADD to make reading more comfortable and then work your way out of the ADD as your eyes get accustomed to working as a team.

May I ask a few questions?

1. Where do you live?

2. How old were you when you got your first glasses?

3. What caused you to get glasses?

Again welcome to the group and please feel free to ask questions. The more you know about vision, optics and how it all works, the better off you will be in the future.

C.


Dude 27 Sep 2014, 12:36

Hi, I recently had new glasses and its Rx was OD:pl -0.50 x180 OS: -1.75 -1.50 x 180, my last Rx was(2 years before) OD:pl -0.25 x 180 OS: -1.25 -1.00 x 180. I'm worried about the difference between my eyes, also because my left eye gets worser every time. Also, I've notice that when I look far my right eye makes all the work, but when I look near, my left eye does it, is it normal? I spend a lot of time in front of screens but my left is the only one that worses, what should I do? Should I wear my glasses full time?

I'm 14


cactus Jack 27 Sep 2014, 10:22

Beth,

There are 3 factors that are believed to affect myopia; Genetics, Visual Environment, and Age. May I ask some questions?

1. Are any of your parents or grandparents or relatives, myopic?

2. May I ask your occupation? Do you read, use a computer, or participate in other activities that involve close focusing?

3. What is your age?

Your visual history is also important. May I ask your last prescription before the present one and what was the time interval between the exams?

C.


beth 27 Sep 2014, 09:39

how to look after eyes is there something you can do to stop getting more shortsighted? i now have regular eyeexams and wearing glasses before i never went for a eyecheckup never. im now wearing glasses all the time its ok but i cant believe im shortsighted. once you depend on wearing glasses to see does it matter if you get more shortsighted?


Melyssa 27 Sep 2014, 08:55

Beth,

As Cactus Jack stated, your difference is not much. I have had up to 1.00 diopter difference in my lenses in the past and I did not notice anything out of the ordinary. I would see it when looking into a mirror with lights above it. My eyes have the same -9.00 RX at this time. Unfortunately, I have dealt with astigmatism, currently +3.00, for the 50.5 years I have worn glasses.


Cactus Jack 27 Sep 2014, 07:15

Beth,

0.50 difference between your two eyes is nothing to get even slightly concerned about. The eyes do not necessarily track each other and it is rare for both eyes to have exactly the same prescription.

A significant difference in the prescriptions can sometimes cause problems, such as double vision, because of different image sizes on the retina. A difference of 0.50 is not enough to even be noticeable. Occasionally, a person will have a significant PLUS prescription in one eye and a significant MINUS prescription in the other. This can really cause image size problems.

In case you are interested, myopia is generally caused by the eyeball growing too long for the total power of the eye's lens system. What is amazing is how little the excess growth is for a person to need vision correction. It is on the order of 0.3 mm per diopter. In your case the -3.00 eye is not quite 1 mm too long and the -3.50 eye is just a tiny bit over 1 mm too long. Not very much and nothing to be concerned about unless it is increasing rapidly

As you mentioned, you are indeed fortunate to not have any astigmatism. Astigmatism is generally caused by uneven curvature of the front surface of the cornea. The exact cause is unknown, but at least some astigmatism is very common even if a person does not need any sphere correction.

C.


beth 27 Sep 2014, 04:10

ive had glasses for a few years. there no way i could of been without wearing glasses after i started wearing them for sure driving. -3.50 -3.00 is bad for me now but im lucky not to have astigmatism. is it that bad to have different prescription in each eye?


Likelenses 25 Sep 2014, 21:56

beth

Your prescription is not quite low.

It is very high for a first prescription.

You most likely needed glasses for quite some time.

However there are cases where myopia comes on quickly,at a rather high Rx. If this is the case ,then you will most likely have several increases in your Rx in the next few years,some perhaps being quite hefty.

You may even need your first increase in about six months.

You will be a full time glasses wearer,and actually should be now.

The difference of .50 between your eyes is also something that is troublesome to you without correction.


Soundmanpt 23 Sep 2014, 17:50

Beth

I'm sure never having worn glasses before and now finding that you can hardly do without them has to be a big change for you? To be honest I think you did very well somehow getting by this long without wearing glasses. But like Cactus Jack and Julian has already said you certainly need to be wearing them when you drive and please understand that your eyes didn't go bad overnight. So you have been driving for some time with impaired vision and just didn't realize it. No surprise now that you have your glasses your now completely unable to see well enough to drive without your glasses. Just understand that your getting glasses in no way ruined or made your vision worse. You sometimes hear people claim that wearing glasses ruined their eyes. not true at all. Just as Cactus explained you simply just slowly got used to your vision and assumed that everything you were or were not seeing was the same for everyone else. No now the vision you have after wearing your glasses for several hours and then taking them off is what you real vision is and has been for some time. There is no "glasses police" so it is totally up to you when and how much you choose to wear your glasses, with the exception of driving which you clearly need them for for the safety of yourself and others. But I think most people with a prescription like yours would be wearing their glasses full time. And even though you seem reluctant to about wearing your glasses anymore than you really have to I think your smart enough that you soon figure it out that you simply need to keep them on if you want to see things without a blur.


Soundmanpt 23 Sep 2014, 17:35

Justin

Just as Cactus Jack said your gf is pretty nearsighted and her vision without her glasses is very blurry. Being in college isn't likely to help her vision either. I think her doctor did a very good thing by prescribing her bifocals. With all the close work she is likely doing with studying her eyes have to be much more relaxed with an add in her glasses.

Her prescription went up some but considering how hard she is working her eyes it's to be understood. Most likely once she is done with school her eyes will get more stable.


Cactus Jack 23 Sep 2014, 10:30

Justin,

All you have to do to get a pretty good idea about your GF's vision without correction is to try on TWO pair of +3.50 readers at a store that sells them. That will be a total of +7.00, which is fairly close to the opposite of -7.00. Effectively, a person who is myopic, like your GF, wears very strong, built in reading glasses. Her significant astigmatism, as indicated by the cylinder correction, just makes it worse because astigmatism messes up vision at all distances.

Beth,

Vision actually occurs in the brain. By doing a lot of extra work, your brain can correct a blurry image, IF it knows what something is supposed to look like. Your brain can even create images in the dark with your eyes closed. Ever had a dream?

Once your brain discovers that it does not work very hard to provide good vision using images that have been optically corrected, it will decide that it really prefers working with sharp, in focus images and will decline to expend the extra work. Think of glasses as a labor saving tool for your brain and what is happening will make more sense.

I suspect that you have other labor saving tools that you use. Once you have grown accustomed to having a labor saving convenience, it is hard to give it up.

C.


Justin 23 Sep 2014, 09:46

Hi Jack,

I'm 20 and don't wear glasses. She is 19 and a junior in college.


beth 23 Sep 2014, 09:44

yes thats the first thing i noticed after getting glasses that i couldnt drive without wearing them. im suprised how easy it is to have become dependant on them. i have tried to wear them less but cant.


Cactus jack 23 Sep 2014, 09:09

Justin,

Your GF is pretty nearsighted and her astigmatism makes it worse. Anything beyond about 14 cm or 5 inches is blurry without her glasses.

You can get an idea of her vision without glasses by putting on TWO pairs of +3.50 over-the-counter (OTC) reading glasses, one over the other.

If you wear glasses, the two pair of reading glasses need to be over your glasses.

If you can provide your age and prescription, I may be able to offer a better suggestion.

C.


Justin 23 Sep 2014, 08:33

My girlfriend just had an eye test and got a new prescription. I wonder if someone can help me decipher what the numbers mean and tell me how bad her vision is.

Her old prescription is:

right eye (sphere) -5.50 (cylinder) -1.75 (axis) 180

left eye (sphere) -6.75 (cylinder) -0.75 (axis) 165

(add) +1.50

New prescription:

right -6.50 -2.00 175

left -7.50 -1.00 160

add +1.50

Thanks!


Cactus jack 23 Sep 2014, 08:11

Beth,

No one forces you to wear vision correction, unless your poor vision is a potential danger to others, such as driving - as Julian mentioned. Obviously, you don't understand much about optics, but the fact that you need -3.00 in one eye and -3.50 in the other means that any thing beyond about 33 cm or 13 inches is blurry. If you also need cylinder correction, it is even less than those distances. As is said in song "Its a small world after all". Your world, without vision correction, is a sphere about 33 cm in radius.

C.


Julian 23 Sep 2014, 06:39

Beth: I'd call that prescription moderate rather than 'quite low', and I'm not surprised that you can't see without your glasses, even if you didn't know you needed them until you had an eye test. I wouldn't want to be around if you were driving a car bareyed::)


beth 23 Sep 2014, 03:18

dont go to the opticians if you dont need to. i went for a routine eye exam and came out needing glasses. now im stuck wearing them all the time. my prescription is quiet low -3.00 -3.50 but i really cant see. is this normal?


Cactus Jack 22 Sep 2014, 20:36

Just Wondering,

Occasionally, you will see a prescription written with multiples of 0.125 diopter rather than the more common 0.25 diopter. They are pretty rare because most people can't discern 0.125 diopter and will choose the next higher 0.25 increment. The examiner may write it as 0.12 or 0.13 or multiples thereof rather than use 3 digits, but the lens maker will know what the ECP wants.

C.


Just wondering 22 Sep 2014, 19:59

I always thought prescriptions only came in multiples of .25 but sometimes I see different type numbers. Am I mistaken?


John 07 Sep 2014, 16:28

Hi Juicebox,

I hope you are well.

Last March you told us you would go for a visit in 6 months..

Do you plan a visit this month ?

Do you think you may need another increase ?

Keep us posted


John 07 Sep 2014, 16:28

Hi Juicebox,

I hope you are well.

Last March you told us you would go for a visit in 6 months..

Do you plan a visit this month ?

Do you think you may need another increase ?

Keep us posted


Cactus Jack 06 Sep 2014, 18:09

Rex,

It is probably not going to be too long until you will need some close focusing help. However, you may find that you can read pretty well without your glasses, if he text is not too small. The culprit there is your astigmatism.

Having a low MINUS sphere correction is like having built in reading glasses. In your case, +1.25 or +1.50. To read at 40 cm or 16 inches requires +2.50 from somewhere, it is one of the laws of optics. If you have uncorrected myopia (no contacts or glasses) of -1.50, your ciliary muscles and crystalline lenses only have to supply +1.00 of the total +2.50 for reading. However, presbyopia is most likely creeping up on you and within a year or two, you will need bifocals or perhaps low power reading glasses to read comfortably. Just remember it happens to almost everyone and fortunately there are simple fixes.

C.


Rex 06 Sep 2014, 09:33

40, working in sales


Cactus Jack 06 Sep 2014, 05:00

Rex,

If the glasses prescription is Sphere -1.25, Cylinder -0.50 the -1.50 Sphere Only contacts makes sense. All elements in a prescription are very important. In an ideal world, Toric contacts would be used to correct astigmatism, but torics are more expensive than Sphere Only contacts and are often problematic. Contacts tend to move around on your cornea (they are supposed to float on a film of tears) and when toric lenses move around, the axis or angle of the cylinder correction (for your astigmatism) can change and that is worse than having a compromise Sphere Only contact with no cylinder correction. The best correction for astigmatism is glasses, because they can be made with the exact cylinder and axis correction.

The Sphere portion of your prescription corrects your myopia and the Cylinder and Axis (they always go together) corrects your Astigmatism. Myopia is caused by a mismatch between the length of your eyeball and the total PLUS power of your eye's optical system. Astigmatism is usually caused by uneven curvature of the front surface of your cornea. A sphere correction of -1.25 means that everything beyond 80 cm or 32 inches is blurry. A cylinder correction of -0.50 messes up your vision at all distances and makes small text particularly difficult to read comfortably.

The decision to wear glasses or contacts with your prescription is yours to make depending on how much visual discomfort you can or wish to tolerate, with one exception. That exception is the legal requirement to wear vision correction for driving and several other occupations where sharp vision is necessary for public safety reasons.

May I ask your age and occupation?

C,


Rex 06 Sep 2014, 00:37

Error cyl -0.5


Rex 06 Sep 2014, 00:37

Error cyl -0.5


Cactus Jack 05 Sep 2014, 19:54

Rex,

I don't know what you mean by "justify". Justify what to whom? The desire to see well at all distances requires no justification to anyone except yourself, period.

I am a bit confused by a couple of your statements. You said that your glasses prescription was Sphere -1.25, Cylinder +0.50. If we convert the + cylinder notation to - cylinder it is easier to understand. The conversion would yield Sphere -0.75, Cylinder -0.50. While they look different, they are optically identical if the axis, which you did not state, is altered by 90 degrees. If the idea is to get a Sphere Only compromise prescription you would add 1/2 the cylinder to the Sphere which would result in a Contact Lens prescription of -1.00. Depending on your age, you can possibly deal with -1.50 contacts using your internal accommodation with the only effect of slightly shaper vision.

The question of can you justify wearing glasses or contacts with only -1.00 or thereabouts. The answer should be obvious if you analyze what -1.00 means. It means that without your glasses or contacts, you cannot see anything clearly beyond 1 meter or 39.37 inches. Beyond that distance everything is increasingly blurry. In effect your world is a bubble 1 meter in radius. That is great for reading and using the computer, but it leaves a lot to be desired if you want to read a distant sign, or recognize a person across the street, pass a driving license test, watch TV or go to the Cinema.

I think it is totally inappropriate for anyone to judge the acceptable quality of another persons vision and what correction they should wear, based on their experience. Everyone is different and has different preferences in the quality of their vision.

You need to look into the cause of your eyes being sore. You could have developed an infection or irritation of the cornea. Not a good thing. You need to discuss the soreness with your ECP.

C.


Rex 05 Sep 2014, 18:38

I went back to my optician last month and have got -1.5 contact lens which have been great - however today my eyes were sore and I didn't wear my lenses and everything looked poor. I had to weAr my glasses driving and my colleague who didn't know I needed correction, was surprised. Reassuringly she started contacts at -1.25. 6 years ago and now is only -2.25.

How can you justify that -1.5 contacts/ -1.25 +0.5 glasses are reasonable to wear fulltime? I know this is borderline


Soundmanpt 30 Aug 2014, 08:46

Alyssa

Well it has been about 2 weeks since you had your eyes examined. By now i would assume you have your glasses as well? So are you still working on getting used to them? You seemed shocked at the recommendation that you need to wear them full time if you don't want headaches. Your prescription isn't like someone that is nearsighted and they can easily tell their eyesight is improved as soon as they put their glasses on. Your correct when you say that you haven't noticed any problems with your vision. That's because your distance vision is still pretty good. Your close up vision is just a little bit weak and that is what the +.75 is for. However your headache problem comes from your astigmatisms and your glasses will also sharpen your vision for distance and close up, but more importantly keep the headaches away.

Your vision without your glasses will still be pretty good, but you will find without your glasses in very short time the headache will return.

So give us an update as to how your doing with your glasses?


motard 27 Aug 2014, 23:10

Had my re check last weekend at a different ecp.

Original 2014 / Recheck

R -6.50 x -2.00 015 / -6.75 x -1.75 020

L -5.25 x -2.00 165 / -5.25 x -2.25 170

I must say I liked the recheck a little better, although at night with CL (-6.00 -1.75 020 & -5.00 -1.75 170) I think it could be better, as most the time 5 days a week im nocturnal.

Also on upnote I finally got my GF in for check for problems at night and headaches. She is now a new wearer. :-)

R -0.25 x -0.25 165

L -0.25 x -0.25 175

Likelenses,

Do you like not having the cyl? As im thinking of doing 1/2 cyl and bumping up sph


motard 27 Aug 2014, 21:16

Had my re check last weekend at a different ecp.

Original 2014 / Recheck

R -6.50 x -2.00 015 / -6.75 x -1.75 020

L -5.25 x -2.00 165 / -5.25 x -2.25 170

I must say I liked the recheck a little better, although at night with CL (-6.00 -1.75 020 & -5.00 -1.75 170) I think it could be better, as most the time 5 days a week im nocturnal.

Also on upnote I finally got my GF in for check for problems at night and headaches. She is now a new wearer. :-)

R -0.25 x -0.25 165

L -0.25 x -0.25 175

Likelenses,

Do you like not having the cyl? As im thinking of doing 1/2 cyl and bumping up sph


Likelenses 25 Aug 2014, 22:40

motard

A number of years back my refraction indicated that a 1.00 cylinder was needed in each eye,when no astigmatism had existed previously .

During the subjective part of the exam,I had a lot of difficulty telling which cylinder was best. The doctor suggested that he give me .50 more minus sphere,instead of the cylinder.This then made my new Rx -9.00,which then became my first pair of flat front lenses.

Since then there has always been a small amount of astigmatism,but I do not get any cylinder,but instead a bit more sphere,which is pretty stable now at -10.5 each eye.


Likelenses 25 Aug 2014, 22:01

Cactus Jack

I am not aware of any studies on that topic.

I do recall reading some statistics in an ophthalmology textbook from 1960,where they stated the highest number of cases of high myopia was in the Jewish,and Bedouin peoples.


Likelenses 25 Aug 2014, 21:54

DS

Additionally,I doubt that she is able to read without correction,due to her amount of astigmatism.


Likelenses 25 Aug 2014, 21:16

DS

I would say that this young girls level of myopia is already too high to read without glasses. If she is able it would not be a good idea,as she would have to hold the work so close that it would interfere with proper convergence. Most text books on ophthalmology recommend full time wear to include reading,when the prescription reaches -3.00 as without reading distance would be too close.

I suspect that she is wearing gas perm. contacts,due to her level of astigmatism.


lentifan 25 Aug 2014, 19:19

DS

I cannot speak about bifocal contact lenses which I have never tried, but I do not agree that wearing bifocal glasses is a major hassle or inconvenience. They do not reduce the field of vision to a significant extent. This is not to say that the wearing of these slows down the progression of myopia; the evidence seems to be inconclusive. But as someone else said, it cannot do any harm, can it?

Separate reading glasses, on the other hand - now that IS a hassle and inconvenience.


DS 25 Aug 2014, 18:15

Worried,

While you have the faction that believes wearing glasses / contacts full time will cause higher myopia thus leading to a recommendation of wearing bifocals or reading glasses, I do not fully buy into the argument.

With various studies showing different results. I'm inclined to believe "some" myopia may be prevented, but not enough to warrant the inconveniences of bifocals or reading glasses. For someone who can comfortably read without correction, I would encourage near work without glasses when convenient. Once bifocals or multiple pairs of glasses become involved I don't think that the hassle is worth it since correction is still required for essentially all activities anyway. One would be trading years of extra hassle and reduced visual acuity for only a minor reduction in the final power not likely to make a practical difference in quality of life or quality of corrected vision.

I noticed that you said "the older 2 got big increases even though they wear contacts." Using contact lenses to control myopia progression is usually accomplished with hard lenses. I assume your two eldest are wearing soft lenses. If I am correct, then according to http://www.revoptom.com/content/c/37770/ this may actually be worse (although negligibly).


NJ 25 Aug 2014, 12:14

I don't have the time to look up the publications now, but both the genetic factors of myopia and the use of reduced power lenses/bifocals for close work have been studied. On the former, I recall that several genes were found that correlate to progressive myopia. On the latter, I believe it was found that reduced power lenses--mostly bifocals IIRC--did slow the progression of myopia but not spectacularly so.

I know I posted this before, but a few years ago there was a myopic family I saw frequently at the soccer fields where my daughter played. Both parents wore glasses, the mom with a double digit Rx. All three daughters wore bifocals. They seemed to be an especially close family, and the daughters quite studious. When the oldest was playing soccer, the younger two had their books out and were studying. They seemed to be very good about using their bifocals to read. The funny part is that the mom would lift her glasses to read or see anything close up because, for some reason, she chose not to wear bifocals.


Cactus Jack 25 Aug 2014, 08:22

Likelenses,

Those are very interesting articles and they certainly point to a positive benefit of relieving accommodative stress in progressive myopia by using both a bifocal and Base In prism. However, the benefits could not override the more powerful genetic factors that exist in families and in certain populations.

Do you know of any studies of myopia and hyperopia that involve genetic sequencing to attempt to identify the genes that regulate eyeball growth? There was a study of nanothalmia at Johns Hopkins several years ago that seemed to point to an Eyeball Growth Hormone, apparently produced by the retina in response to accommodative stress, but to my knowledge the hormone was never isolated or identified. Nanothalmia is a condition where the eyeball fails to grow and extreme hyperopia results.

I have not read anything more after the initial announcement. There seems to be plenty of empirical evidence that an eyeball growth process, that is sensitive to image quality on the retina and/or accommodative stress, but is ultimately governed by genetics, almost has to exist.

C.


Likelenses 25 Aug 2014, 01:28

worried about my kids

Here is some info. that may be useful to you.

http://articles.latimes.com/2010/jan/12/science/la-sci-myopia12-2010jan12

http://www.myopiainstitute.com/myopia-research-library/bifocal-and-multifocal-eyeglasses-and-myopia-control

http://www.myopia.org/ebook/12chapter7.htm


Cactus Jack 24 Aug 2014, 22:11

worried about my kids,

The use of reduced prescription glasses for close work, for young people with progressive myopia, has not been proven to help, but it can't hurt to try. The reading segment in bifocals is a reduction of the distance prescription by the amount of the add.

I suspect the big problem will be getting your daughters to consider wearing bifocals, even if they are prescribed. However, the tiny text on smartphones and tablets have caused a lot of teens to need bifocals at an early age. So I don't think it will be long before bifocals are a fashion statement among teens.

If your daughter(s) wear contacts, they might be willing to wear some stylish Over the Counter (OTC) reading glasses or if they wear single vision glasses full time, you might investigate some clip on magnifiers available from Rx Safety Glasses. They are the same as OTC reading glasses, but clip on your regular glasses like flip-up sunglasses. I use them and really like them.

Here is a link to Rx Safety Glasses website.

http://www.rx-safety.com/magnifying-products/clip-on-magnifiers.html

You did not mention where you live. Rx Safety Glasses is located in New Jersey, but I suspect they will ship anywhere.

If you need help selecting a power for reading glasses or clip-ons, let us know.

C.


Likelenses 24 Aug 2014, 19:21

worried about my kids

The minus portion of her new prescription is about where I would expect it to be for her age,and previous prescription.

I would suggest that you ask the doctor if he would prescribe for her a pair of bifocals,and if she wants to continue wearing contacts then bifocal contacts as well.Wearing her older glasses for near work will not do the trick,because her astigmatism also increased.she does have a significant amount of astigmatism. Studies have shown that the use of bifocals for a younger myope is beneficial to slowing the progression of myopia.

If she is planning on going to college the time to try this approach is now,as she is a prime candidate for large increases with the visual work load of college.

Can you tell us a bit more of your vision / correction history?Also the history of the other two siblings would give some clues.

One thing that you can do as a parent is to watch closly their reading,and other close work distances. If it is closer than twelve inches,or closer than 20 from a computer monitor,stress to them to stay at the above distances.As you are aware with myopis without glasses near objects appear quite large, and when minus lenses are worn those objects appear smaller.The myopic person has become used to the large images,and therefore has a tendency to want that larger image with the glasses on. This actually causes near point stress, which in turn causes increases in myopia.Do you read at twelve inches,with your - 12?


Tom 24 Aug 2014, 18:18

I hope "worried about my kids" won't miss the previous post by soundmanpt in reply to my comment.

Keep us update, if you want, and post prescription of the younger girls, too.


Soundmanpt 24 Aug 2014, 11:08

Tom

Yes it would be best if they would wear their previous prescription glasses when doing close work. However in most cases I really doubt that your going to convince a 16 year old girl to stop wearing her contacts and instead can have 2 pairs of glasses at school so she can change as needed. Now of course once at home she really should remove her contacts anyway and wear her glasses in the evening, so then it would be best for her to wear her weaker glasses when she is doing homework or reading. Of course this applies to the 2 younger girls as well.


Lucas 24 Aug 2014, 10:45

Booked my gf an appoitment in september. Curious about the results. Any chance her prescription decreased?


Tom 24 Aug 2014, 09:35

Soundmanpt, worried about my kids:

The three girls are still in their school age, that means lot of close work to do. Wearing full time correction, they are struggling their poor eyes most of time to focus through the correction, while the nature have given them eyes that are more suitable then normal eyes to a close vision. Moreover, since contacts cannot be removed easily (or not at all, when switching between different activities implying a mix of far and near vision) this makes the sitation even worse.

Don't you think they should wear weaker correction at least for close works ( e.g. reading or even PC) to reduce the increase of myopia? I'm not expert, but this position sounds quite reasonable to me...


Soundmanpt 23 Aug 2014, 14:06

worried about my kids

Its all a part of growing up and may include growth spurts along the way. So when you see one of your girls grow an extra inch or so you should expect that her eyes also also grew longer as well and she became a little more nearsighted as a result. And no there is nothing you can to stop or slow down the process anymore than you were able to slow down your increases when you were younger. Your doing just what any good mother would do, your seeing that they get their eyes examined each year and new glasses and even new contacts as well. I'm sure your girls don't like the fact that their eyes continue to change, but with their contacts their vision shouldn't stop them from doing anything they want to do such as sports. Based on when your own vision became stable should give a clue when their eyes may expect to start to get stable as well. It would seem that your 16 year old will be at least at the same prescription as you are when she starts to get more stable with her eyes.

Just keep in mind there isn't anything that you did wrong as you have no control as to the genes your daughters were going to get for their eyes.


worried about my kids 23 Aug 2014, 13:34

Reposted to correct a typo.

I just got home from taking my kids to the optometrist for their back-to-school eye exams. It was a really upsetting experience. I am horribly nearsighted (-12). My husband has 20/20 eyesight. You would think his genetics would have some mitigating effect, but all 3 kids are following me. I wish there were some way of slowing them down. I have 3 girls, 16, 14 and 12. Every year, their prescriptions get stronger. This time, the older 2 got big increases even though they wear contacts. Even before the doctor examined them, she said it would be bad news. Her assistant had checked the girls’ vision in the autorefractor and it said their eyes had gotten much worse. If you think I’m exaggerating, the oldest girl’s new “spectacle” prescription is (right eye) -8.00 -1.75 65 (left) -7.50 -1.50 120. Last year’s prescription was (right) -6.50 -1.50 60 (left) -6.25 -1.00 120. That seems pretty serious to me. Is there anything I can do from stopping their eyes from getting as bad as mine?


worried about my kids 23 Aug 2014, 13:30

I just got home from taking my kids to the optometrist for their back-to-school eye exams. It was a really upsetting experience. I am horribly nearsighted (-12). My husband has 20/20 eyesight. You would think his genetics would have some mitigating effect, but all 3 kids are following me. I wish there were some way of slowing them down. I have 3 girls, 16, 14 and 12. Every year, their prescriptions get stronger. This time, the older 2 got big increases even though they wear contacts. Even before the doctor examined them, he said it would be bad news. Her assistant had checked the girls’ vision in the autorefractor and it said their eyes had gotten much worse. If you think I’m exaggerating, the oldest girl’s new “spectacle” prescription is (right eye) -8.00 -1.75 65 (left) -7.50 -1.50 120. Last year’s prescription was (right) -6.50 -1.50 60 (left) -6.25 -1.00 120. That seems pretty serious to me. Is there anything I can do from stopping their eyes from getting as bad as mine?


Danbert 21 Aug 2014, 08:13

Alyssa,

An astigmatism of magnitude 1.00 is high enough that you have lost a perceptible degree of acuity. You may not realise it but if you wear your prescription for a while and then remove it, you'll probably notice the difference. Whether or not this matters to you is ultimately your decision to make. It may be that your astigmatism is contributing to headaches, so for that reason alone you may well decide that it is worth wearing full time correction.


motard 20 Aug 2014, 17:43

So my 2nd opinion exam is scheduled for friday.

Has anyone not heard of Spherical equivalent refraction?

(See my previous post about it)


Alyssa 20 Aug 2014, 16:45

Full time?!?! Really? I wasn't expecting that. I was hoping I could just use them occasionally at home for reading and computer use (at the most) and that would be enough. I don't find things blurry or anything so figured my eyes weren't too bad. I didn't really plan on people seeing me in glasses!


Soundmanpt 19 Aug 2014, 20:06

Alyssa

I completely agree with what Varifocals has said. Your slightly farsighted which is the +.75 numbers in your prescription and that isn't very much at all, but most likely the reason your getting headaches is due to your astigmatisms. That would be the -.75 and -1.00 numbers. (The other numbers are your axis numbers and they don't contain any power values) Once astigmatisms get past -.50 headaches can soon become a problem.

Now i will warn you since these will be your first glasses that they may take some getting used to. The first thing you will notice when you put them on is that your distance vision will be somewhat blurry. Also you may feel a bit dizzy and feel like the room is spinning as well. But these things will soon go away as your eyes adjust.

If you want the headaches to stay gone and be a problem anymore you will need to wear your glasses full time.


Varifocals 19 Aug 2014, 13:10

Yes Allysa.

They should ease your headaches.

I started off like that myself, liiving on headex!

The headaches were awful & sine I have had glasses, now varifocals I have comfort & clarity that is the main thing & I wear full time +2.75/ 5.25 now so to read unaided is useless.

Hope that helps.


Alyssa 19 Aug 2014, 10:22

I just got a prescription for glasses

+0.75 -0.75 20

+0.75 -1.00 163

I went to the eye doctor because of occasional headaches. Will these glasses make much difference? Will I end up using them much? I'm 39 and this is my first pair of glasses.


motard 19 Aug 2014, 09:29

Well visited the ecp last weekend. Heres the goods

Previous Rx 2013 / New RX

GL

R -6.50 , -1.75 020 / -6.50 , -2.00 015

L -5.25 -2.00 170 / -5.25 , -2.00 165

CL

R -6.00 , -1.75 020 / -6.25 ,-1.75 020

L -5.00 , -1.75 170 / -5.25 , -1.75 170

During exam I stated I was having trouble with distance, which I am. During the exam he did get me a little better but still having some skew/blur. For the CL rx he said that -2.00 cyl is not avail so I got the -0.25 bump instead, the trail CL were blurry, even when he held up the -0.25 trial lenses. Either way im not fully corrected almost seems worse. Im considering 2nd opinion this weekend.

Question for our experts: Have you heard of Spherical equivalent refraction? it is where 1/2 cyl is added to sphere to get a close enough rx with low cyl pwr. Ex -2.50 , -1.00 50 becomes -3.00 sph only

Has any tried to hybrid it?

Ex with my rx with the higher cyl

-6.50 , -2.00 20 would become -7.50 , -1.00 20

With some tweaking -7.75 , -1.25 20 looked pretty good in trial frame/lenses


Michael 17 Aug 2014, 10:46

Are you talking about on the written script? I never saw that before. I remember when I was a kid my mother would take me to the eye doctor and she made it a point to ask him when I should be wearing my glasses. I don't think I ever asked and I don't ever remember a doctor or optician saying anything to me. My friend probably assumes that since her doctor didn't say anything to her then she doesn't need to wear her glasses full time. But I would bet money if she asked him he would tell her that she should.

Good luck to your girl friend on her upcoming eye exam and make sure you post here on what happens and her new script. I am assuming she needs a new script because you said she seems to be struggling seeing things at a distance. But I thought my friend needed a new script as well but was told she didn't. So who knows. I really don't trust the place my friend goes to because she had an eye exam and picked out new frames and was out of there in a half hour. I never had an eye exam I don't think that was less than 45 minutes. I don't think the place my friend goes to likes her very much because she going back there every few months with broken glasses. The last time one of the temples came off and in the past her lenses kept popping out. And even though she does the things with her glasses I told you about she is blaming them that they are breaking all the time and she is a very strong willed person so I can just imagine the hard time she is giving them. I am almost thinking that when she went there in March for her last eye exam they just told her her eyes didn't change because they wanted to get rid of her as quickly as possible. I don't think they want to deal with her anymore because she is a very difficult person to deal with. And she even told me she was going to tell them not to put eyedrops in her eyes because she doesn't like them. Although I think they did do it last time.

And now she is saying she doesn't really see well even with her glasses. All of this makes me wonder what kind of eye exam they gave her. Not very comprehensive that is for sure. I don't know how anybody can be out of a doctor's office in a half hour especially since some of the time was for picking out new frames. You figure at least 10 minutes to pick out new frames and be measured so that would mean her actual exam was probably 20 minutes at most.

I just don't trust that place. I even went online to see if there were any bad reviews about them and couldn't find any. So I don't know what the story is but something doesn't sound right to me. Last time she got a metal frame and the lenses kept popping out. They would fix them but it kept on happening over and over again. So this time she wanted a plastic frame thinking it would be stronger and about a month or so ago one of her temples came off. I don't think the problem is with the frame. It is what my friend does with her glasses and I don't think it has anything to do with the place or the lab doing shoddy work.

I suggested to her before her last eye exam to go someplace else because I don't 100% trust the place even though I never went there myself for an eye exam. But after her last eye exam I have even less trust in them considering how quickly she was in and out of there. I suggested to her to make an appointment with my doctor who I trust.She gives a very thorough exam and have a lot of confidence in her. But my friend is extremely hard headed. I actually think the reason she goes back there is she enjoys giving them a hard time. If she actually believes they do sell her cheap glasses why in her right mind would she keep on going back there? I certainly wouldn't if I wasn't happy with the place. But I am almost 100% sure the problems my friend always has with her glasses has everything to do with her handling of them and nothing to do with the place or the lab.But I still don't trust the place. If she never went back there again I don't think anybody there would shed a tear. Honestly I think they are sick and tired of dealing with her. I am almost sure that nobody else goes back there with broken glasses as often as my friend does. If glasses keep breaking every couple of months or so something is obviously wrong.


Lucas 17 Aug 2014, 03:06

She will be going to the dr early september. I wont have any problem seeing the prescription, as ill pick her up or be there in the waiting room. As for the suggestion of full time wear, the place I go to has a box on the paper for the recommended use of the glasses (full time, reading or distance). Ill be curious to see what the Dr checks.


Michael 16 Aug 2014, 21:10

My guess is her prescription will change but I thought my friend's prescription would change too but it apparently didn't. She is 52 years old and her script hasn't changed in about 4 years. Which I find unusual. She does have bifocals and I would think in four years she would at the very least need a stronger reading add but no.

She just gives me the impression she needed stronger glasses just by watching her struggle to see. She just uses them for reading and almost nothing else. Never for TV unless she is watching a horse race and then she puts them on because she doesn't want to miss any details. Also has major problems with glasses because she doesn't believe in eye glass cases so she either keep them loose in her purse, on her head or hanging from her shirt. No wonder they either break often or even worse she loses them. There can't be anybody worse with glasses than she is. I would bet an 8 year old getting glasses for the first time would have less problems than my friend has with glasses.

My friend also has a fairly significant difference in the vision between her eyes. But the difference between my friend and your girl friend is my friend's good eye doesn't seem all that good anymore. It would just be so much easier for her and she would see much better too if she wore them full time. I think she is in denial because she is always telling people she doesn't need to wear glasses full time.I don't think her doctor told her that. But if she asked him I think I know what he would say. Something my friend wouldn't want to hear.

In my friend's bad eye she also has a moderate amount of astigmatism which I would guess impairs her vision even more. I can't remember your girl friend's script but if I remember correctly she isn't really dealing with any astigmatism. Am I right? I also asked Cactus Jack if my friend has a lazy eye. He said it is possible but a fairly significant difference in vision between the eyes doesn't necessarily mean a lazy eye. But Cactus Jack did confirm that if there is a significant difference in the vision between the two eyes the brain will pick the clearer image and neglect the other one. I also read that if a person has a fairly significant difference between their eyes you are probably better off wearing glasses full time even if the better eye is almost perfect like your girl friend's was. That makes sense because it would be the only way a person would be able to use both eyes together to see.

When is your girl friend going for an eye exam? Are you going with her? I wonder if her eyes got worse the doctor would say anything to her about wearing glasses full time. As I said before usually they don't unless you ask. And from what you tell me about your girl friend she doesn't sound like a person who will ask.

She will probably at some point have to begin wearing glasses full time but I would say let her do it on her terms. Don't get on her case because it may have the exact opposite effect and she will wear her glasses even less than she is now. My friend hates wearing glasses so that is why she does the constant on and off thing.But if her goal is not to attract attention she would be better off just keeping her glasses on. People tend to notice at least I do when someone is constantly putting glasses on and taking them off. If you don't want to be noticed you are probably better off just leaving them on.

But after your girl friend's exam try to post her script here so we will know what is going on. Do you think she will let you either see it or make a copy of it. I had to find my friend's script while she was at work and fortunately I did and made a copy of it for myself. It is hard to write here and get opinions unless you have the exact script. She would kill me if she knew I was writing about her glasses script on a message board.


Lucas 16 Aug 2014, 17:53

Michael, Ill be curious to see how her prescription changes. As of now, she fails to see she really needs them and tends to get closer to things instead of squinting to see things. I think itll take a decrease in her good eye to convince her to wear them. I dont think shell want to wear them all the time any time soon.


Michael 16 Aug 2014, 14:14

Lucas

It sounds like your girl friend may become a full time glasses wearer very soon. If they tell her she should wear her glasses full time do you think she will take their advice or not? As Cactus Jack and others here often say it is up to the person to decide when to wear his or her glasses. It is personal choice. I am in the same situation with my friend who lives with me. I saw her prescription and made a copy of it for myself when she wasn't around of course and wrote here about it and Cactus Jack responded that most people with her script would choose to wear it full time which confirmed what I thought but he emphasized if I wanted to maintain a relationship with this person not to push her about wearing her glasses. So I don't say anything to her about it and just let her do what she wants to do.

So that is the advice I would give you. If they tell your girl friend she should wear her glasses full time and she doesn't want to don't push her about it because in the long run you might be the loser. But my experience with eye care professionals over the years is most of them don't even offer advice as to when to wear glasses unless you specifically ask them.


Lucas 13 Aug 2014, 05:44

Thanks SC!.

Shes going to get another eye exam and ill post the results. Shes been struggling to see things in the distance recently.


SC 13 Aug 2014, 04:52

Lucas,

Just because there is a difference between the eyes doesn't mean they have a lazy eye. Nor does someone having a Rx of +2.25 at a young age mean that they need to wear them or that they cannot see perfectly without them.

Headaches can be a problem but I never suffered with them. At around 21yo you should have lots of accommodation - certainly enough to overcome +2.25, in many cases people do not even know they are farsighted. The only people who generally need glasses at that age are those that are already hooked.

Lazy eye means different things to different people - some people can have perfect eyesight but the brain will not use the image so they suffer with 3D perception. In my case it seems that the left-eye connection to the brain did not fully develop but my brain still makes as much use as possible from the eye, even though the image is poor.

On a recent test, the optometrist said that in my case the astigmatism was likely a bigger factor. He was shocked that they eye had never been accurately refracted - I was shocked how astigmatism correction can change the image - I had never seen so clearly with that eye: SPH: +4.0, CYL +1.75 AX 173.


Lucas 01 Aug 2014, 10:41

She currently wears them for reading and sometimes for class so she should have no problem adjusting to full time wear I think.

Only thing is she needs to realize the need for them


lazysiow 01 Aug 2014, 10:16

Well it may or may not have started drifting yet but without an eyetest, get her to close her good eye and if she's shocked at how bad her vision is out of the other eye but sees fine with both eyes then yup, that's classic lazy eye. Hopefully its early enough that no prisms are needed but she'll have to wear her glasses as much as possible assuming she'll be able to see distances fine with the plus prescription. Maybe its only for reading.

Her vision may become blurrier without glasses over time but that's the brain starting to use both eyes again and over all a good thing. It's far worse to lose the vision in the bad eye entirely


Lucas 01 Aug 2014, 02:30

I will try to book her an appointment later on.

Im surprised she would have a lazy eye. Wouldnt you be able to notice a lazy eye physically?

Also, her last doctor for that prescription had recommended to use them only when needed, although he seemed very conservative about her eyes.

What im surprised about is that she has no problems seeing at all distances without correction.

Thanks


Weirdeyes 29 Jul 2014, 19:15

Lucas

I agree that she should get her eyes checked. Her prescription might not be entirely correct, so she might not find it useful enough. I didn't like wearing my glasses until I had a good enough prescription.


Soundmanpt 29 Jul 2014, 18:31

Lucus

The first advice I will give is that your girlfriend is long over due getting her eyes checked. If she is now 21 and it was about 4 years ago that she got her last eye exam that means she was only around 17 at the time. Chances are extremely good that her eyes have changed quite a bit since then. So by now even her once good / better eye has probably gotten worse. I agree with Lazysiow that she likely has a lazy eye and generally if that isn't corrected at a much earlier age it becomes a permanent condition. If in fact she does have a lazy eye it is very possible that she will need prisms added. That may also be in part why she is getting headaches so often. But at the very least I am quite sure her headaches are due to her eyes and with increased reading and other close work the headaches will only get worse. So I have no idea how you can convince her to get here eyes examined but that is clearly where she needs to start. I would be shocked if she isn't advised to wear her glasses full time now.


Lucas 29 Jul 2014, 14:48

Thanks, ill try to convince her to see the dr again as the message of full time wear will come better from him. im surprised though she can see all distances with them so well when only rarely wearing them


HighMyopic 27 Jul 2014, 19:15

I have been enjoying my -29 diopter glasses. I have been ziplining while wearing them, went to a bowling alley with them, and wore them while trying to order a drink at the bowling alley.


lazysiow 27 Jul 2014, 15:32

She definitely should. With that much of a difference she probably has a lazy eye or she is at high risk of developing one since her brain has probably been shutting off her bad eye and she could end up permanently losing vision in that eye if not already


Lucas 22 Jul 2014, 12:16

She has been at university for a year now. She has a lot of headaches but doesnt seem to believe they come from not wearing her glasses. Time to convince her to get a new exam. Would the doctor recommend that kind of prescription to be worn full time to release the strain on the one eye?


Michael 21 Jul 2014, 18:11

My guess is her good eye which is almost perfect is the one she is using to see with.I think when there are two different images the brain will pick the better one. That is what our experts here like Cactus Jack and Soundmanpt I believe always say. As to whether or not your girl friend will become more dependent on her glasses in the future I think the experts here would be more qualified to answer that than I am. But right now she is able to compensate. You say your girl friend is 21. Am I correct that she has been at the university for a few years now? If that is the case she certainly up to now has been able to handle the reading and close work she has to do. But if she has just started university I would say it is possible she may need to wear her glasses more frequently.


Lucas 21 Jul 2014, 17:02

My girlfriend got glasses about 4 years ago that were +2.25 and +0.25. She barely ever wears them. She is now 21 and at university. Is she likely to need them more or is her good eye enough to compensate?


Weirdeyes 18 Jul 2014, 18:39

My eyes were feeling tense today and I got my eyes tested. My prescription is now lower. It used to be L sph +4.25 cyl -1.25 R sph +1.75 cyl -0.75. He changed it to L sph +4.00 cyl -1.25 R sph +1.25 cyl -0.75.


motard 02 Jul 2014, 21:34

My trial lens set came in today. I got to playing with it and it was interesting. Im a little over a year since last professional eye exam.

My last/current glasses rx is

R -6.50 -1.75 020

L -5.25 -2.00 170

With trial lenses and frame I started at previous rx and I came up with

R -7.25 -2.25 030

L -6.00 -2.25 175

I have appt in couple weeks so will be interesting to see what drs come up with


nearsighted girl 02 Jul 2014, 16:53

hi cactus jack,

i never wear my glasses, they're too thick, but i got my mom to loan me the prescription and it is: R -7.50 -2.25 177

L -6.75 -1.75 158. she said i have an exam once a year and my eyes always get worse because i'm 15.


Cactus Jack 02 Jul 2014, 09:31

nearsighted girl,

Thank you for the contact lens prescription. That is much more useful than just the sphere numbers you provided before. However, contact lens prescriptions are often compromises, particularly when a complex prescription is involved. Glasses prescriptions tend to be more accurate. Do you by chance also have a glasses prescription?

An optical prescription is, in many ways, like a recipe for a cake. If you don't include everything in the exact amounts. The cake may not taste very good.

C.


nearsighted girl 01 Jul 2014, 23:08

hi cactus jack

actually i wear contacts and i'm 15 hehe. i copied the numbers from my boxes. they're much more complicated than i posted yesterday. also slightly different for each eye. i wear acuvue oasys for astigmatism. the D number changed from -5.5 to -6.5 for my left eye and from -5.75 to -7.0 for my right eye. the other numbers look like they stayed the same. the left eye is CYL -1.75 AXIS 160 and the right eye is CYL -2.25 AXIS 180. and both sides say BC -8.6 DIA 14.5


rIc 01 Jul 2014, 05:27

nearsighted girl:

Hello. One negative diopter more if you needed -5.50 before is not too notticeable if you are not wearing your correction, just notticeable for far vision if you wear your old prescription. That would mean that you need to read closer, and you need to change your old lenses.


Cactus Jack 01 Jul 2014, 05:06

nearsighted girl,

Assuming you do not need any Cylinder correction, the Sphere numbers you provided mean that your relaxed distance focus point moved from a bit over 7 inches or 18 cm. when you needed -5.50 to 6 inches or 15 cm. now that you need -6.50. Everything beyond those distances is increasingly blurry. Your prescription increased by -1.00 diopter.

In practical terms, that means that if you were able to see distant things clearly with your -5.50 glasses when you first got them, you can now only see things clearly if they are within a distance of 1 meter or 39.37 inches of your eyes.

“Worse” is a relative term and only has meaning based on what you are trying to do. Your distance vision got “worse”, but I suspect you didn’t notice much difference in your near vision with your -5.50 glasses.

If you want to know more about how all this works, I suggest you do some research on Optics as defined by Sir Isaac Newton, of gravity fame, as he discovered how optics work some 300 years ago. A little research on vision and how the eyes work wouldn’t hurt either. If you understand how to multiply and divide, you won’t have any trouble with the math.

You did not mention your age or the time between your -5.50 and -6.50 prescriptions, but I suspect you are in your teens. If so, it is likely your vision will get “worse” until you are in your 20s. Hopefully, at a lower rate of increase.

C.


nearsighted girl 01 Jul 2014, 02:31

so, if the optometrist says you need more minus does it mean your vision got worse? how much worse is it it it changed from -5.5 to -6.5? thanks hehe.


chickenpotpie 30 Jun 2014, 23:40

Thanks for your responses.

Revolver and Soundmanpt, I do have AR coating and don’t notice glare when I drive at night. I really don’t drive that much but it’s nice to have when I need them.

Rex, I really don’t wear my glasses very much. Honestly only when I drive at night and once in a while when I’m watching a game on TV at a bar or looking at a presentation in a meeting. Maybe 3 hours a week total?

I’m not worried about ruining my eyes or anything I just don’t feel like I need them. I considered getting contacts for part time wear (dailys), had a hard time putting them in and never went back. If I ever reached the point I felt like I needed them for full time wear I would probably try getting contacts again to be honest. I am active and think it would be a better option for sports. I’ll reevaluate if this becomes an issue :).

That being said, my frames and cute and stylish (or at least I think so?): http://www.robertmarc.com/collections/women/optical/view/rm-286 - mine look like the ones in the pic but have light blue accent instead of pink. I was very picky this time around. The first time purchased glasses five years ago I felt like I had no idea what I was doing and bought frames I didn’t end up liking very well. I didn’t want to make that mistake again!


HighMyopic 29 Jun 2014, 00:28

My eyes feel like they ache in the eyeballs after I wear the high minus glasses for a little while. Is this a good sign of inducing myopia? I do feel a bit tipsy every time after wearing the high myopic glasses.


Cactus jack 28 Jun 2014, 22:43

HighMyopic,

You seem to have all the answers, so why are you asking anyone on this forum how to do anything. What could we possibly know that you don't already know. I think you should continue your experiments and let us know how they work out. I have never been entirely happy with the formulas we customarily use or the Excel chart. You could be on to something that we have missed.

You should have the courage to put your money where your mouth and beliefs are and not try to bum glasses and or contact lenses from others. You need to get your glasses and contact the old fashioned way, BUY THEM like the rest of us did.

I will give you a hint. You need to start all calculations with your actual COMPLETE prescription and NEVER try to make someone else's glasses fit you by using contact lenses. The glasses prescription is the LAST thing you order, NOT the FIRST.

C.


HighMyopic 28 Jun 2014, 11:49

Cactus Jack

I think I would need about a +23.5 diopter contact for my left eye and a +24.5 contact for my right eye to be able to see clearly in my -29 glasses. Is that true or would I need some more fine tuning to be able to see clearly?


Cactus Jack 28 Jun 2014, 11:25

It is interesting to compare the two posts, allegedly from HighMyopic, that are 12 minutes apart. The first extols the virtues of his -29 glasses and the second describes his vision with them. I suspect the second one is closer to the truth.

Some rough calculations of vertex distance effects indicate that the effective refractive power of the -29 glasses are about -19 at the cornea. If he normally wears about -5 glasses, he would need +14 diopters of accommodation to see distance reasonably clearly and +16 to +17 to be able to read, without even considering any cylinder that he may need or be present in the -29 glasses.

It is highly unlikely that a person could make the leap from accommodating in the +1 to +3 range for ordinary needs to +14 to +17 without extensive ciliary muscle training and conditioning. It is like going from lifting 20 pound weights to bench pressing 400 pounds in one fell swoop. Even if you succeed in that level of accommodation, it will take quite some time for your brain to learn to deal with the distorted images delivered by high minus glasses. People who need those levels of vision correction, typically have years of gradually increasing prescriptions to learn to deal with them.

Perhaps we should ask Moonshiner to create a thread called "Learning About Vision and Optics - the Hard Way" for people like HighMyopic. There is an old saying: "Knowledge comes from the things you read. Experience comes from the things you didn't."

C.


Likelenses 28 Jun 2014, 00:17

High Myopic

Enough of your nonsense posts. Please go away.


HighMyopic 27 Jun 2014, 23:54

My vision in these -29 glasses is incredibly blurry and extremely rounded. I have really horrible vision with these glasses. I can not read anything on the computer, a box, on instructions or a book. I can walk around, but it really distorted and everything looks far away through the bowls of the myodiscs.


Rex 27 Jun 2014, 23:43

High myopic

You are in a different league!


HighMyopic 27 Jun 2014, 23:42

I now really like to wear my stronger -29 diopter biconcave myodisc glasses much much more that my older -5.50 and -4.50 diopter glasses. The -29 glasses are very conformable to wear and fit me well. I really love the smooth frame and the thicker lenses. My other weaker glasses do not impress me nowhere near as much as these amazing myodisc glasses.


Rex 27 Jun 2014, 23:20

Chickenpotpie, my prescription is -0.75. -0.5 stronger.i now wear contacts fulltime. If I was more comfortable with glasses I might be wearing parttime.do you wear your glasses a lot?


Soundmanpt 26 Jun 2014, 21:06

chickenpotpie

The information that "Revolver" provided you I agree with completely. In regards to your question about how your astigmatism would equal out to if you converted it to only SPH, the eye that is only -.25 would not be changed and the eye with the -.50 if you getting contacts your doctor would most likely write your prescription for that eye as being -.75 for SPH.

The idea of having AR coating on your glasses is also a very good idea because it really does help with glare and reflections and should more comfortable to your eyes as well.

Your doctor gave you good advice about how and when to wear your glasses. Your eyes really only need minimal help for seeing distances and none really for close work.

But if you like wearing your glasses even when you don't really need them your doing no harm to your eyes at all. So if you choose to wear your glasses for fashion its not doing any harm.


Revolver 26 Jun 2014, 20:28

Yes, your experience re distance/close vision is spot on for that RX. Your spherical equivalent is as you stated, meaning the total minus. The only suggestion is that since driving and especially at night seems to be your main usage, get AR lenses as you'll notice a great improvement that has nothing to do with your scrip. And at age 32 it's highly unlikely you'll have an increase or even a change until you become presbyopic and need a reading add and even that will be postponed somewhat as you can do near point fine without correction. But, given the nature of this site, I do hope you have a wardrobe of attractive frames and wear them often as a fashion accessory.


chickenpotpie 26 Jun 2014, 19:40

Hi all,

I'm a 32 year old F. My prescription is:

- 1.0 -.25 90

- .5 -.5 80

I wear glasses part time, primarily for driving at night. I'd had them for about 5 years with minimal change in prescription.

I don't get headaches when I don't wear them. I really can't tell the difference honestly unless i'm looking at something far away like a sign. In fact, my eye dr. suggested I don't wear then when i'm working on a computer and really only wear them for distance activities like driving and watching sporing events.

Silly question, is my vision similar to a person who is -1.25, - 1? Essentially, add my astigmatism to my distance number.

I don't even notice blurriness up close as a result of my astigmatism, is this typical for a person with a low amount?


KarenZ 18 Jun 2014, 08:23

My previous prescription was:

+ 1.00 -.75 010 Add +2.25

+ 2.25 -.75 160 Add +2.25

I had not had an exam for about 3 years so it changed quite a bit just was wondering if I should spend the money to order high-index or it if would really matter that much. I have never ordered high-index before.


Slit 17 Jun 2014, 22:14

KarenZ,

When looking at the Rx can imagine it's going to look slightly thick. But it all depends on comparative way you look at the previous glasses of yours.

What was your previous Rx?

Was it for Presbyopia (generally after 40 years of age) or for hyperopia (can occur at any age)?


KarenZ 17 Jun 2014, 11:52

Hi, just got a new prescription. Do you think I will need to go to High Index Lenses or what would be the best lense to get. Not sure how thick these would be with the standard lenses.

+ 2.00- .75 010 Add +3.50

+ 3.50- .75 160 Add +3.50


Brian 05 Jun 2014, 21:47

Jill, My lenses look similar to yours and mine are pretty much flat fronts as well. I have a little more prism in my glasses than you do 5BI in each eye. For the 1st time since I got prisms in my glasses for the 1st time back in 2010 it held steady at my exam this year and the doc said I should likely level off with needing 10 to 12 total prisms 5 to 6 in each eye. I'm still in my mid 30's so hopefully I have a few years farther away than being bit my the bifocal bug like you mentioned might be happening to you soon.


Likelenses 03 May 2014, 20:58

Ava

Did you discuss future Rx increases,and the potential for her to wear bifocals to slow her progression?

Do you wear glasses for myopia?


Ava 03 May 2014, 18:00

to Likelenses and others:

My daughter had her doctor's appointment today. The doctor confirmed what the nurse thought -- she needs stronger glasses. Here is her new prescription:

R -10.25 -0.50 95 L -11.00 -1.00 90

She seemed very happy to see so clearly.


Jill 03 May 2014, 13:46

They are hi index lenses, my invoice said 1.67 index.


Likelenses 03 May 2014, 01:45

Jill

Great looking glasses!

The photo looking down at them from the top appears that the front of the lenses are perfectly flat.

The base in prism makes them look much stronger than - 5.

Would love to see you in them.


Jill 02 May 2014, 23:58

Here is the clickable link for my glasses, http://imageshack.com/user/jillybean74 I noticed the 1st link didn't go through I posted a few days ago.


Likelenses 02 May 2014, 01:18

Ava

Opps,Where I was talking about her previous increases in Rx, I said -.05 ,but really meant-.50.

Also forgot to explain the four readings for each eye.The autorefractor takes four very rapid readings and the doctor can then average them to determine a starting point for which lenses to set up in the phoropter,at which point she will say which is better 1,or 2.

Her autorefractor readings are really pretty close,so no need to get a second opinion. But do get her the exam,and the new glasses.

Do you wear glasses?If so what is your Rx?


Likelenses 02 May 2014, 01:05

Ava

From the fact that your daughter has had glasses since Kindergarten,and her Rx is quite strong,you most likely are aware that she has what is called progressive myopia.Actually her Rx as of Sept is such that she most likely has had rather small increases in her Rx every year,probably about -.05,with a few about -1.00.Really not too bad for progressive myopia.

The readings,four for each eye,were done on an instrument called an autorefractor.It give the Optometrist a pretty good idea where to start when doing the subjective part of her exam.It looks like her right eye will need about -1.00 more,and her left -1.50 more with perhaps a bit more cylinder correction in the left for the astigmatism.Overall those are not huge increases,but between now,and her completion of college,it is likely she may have a few more like these.

Yes, she is having difficulty seeing the board,as her right eye is about 20/70,and her left is about 20/100 with her glasses.This would be about or slightly worse vision than a person that would be getting their first pair of glasses.

You may want to ask the doctor if he thinks that bifocals would help slow down her progression.With college visual demands a progressive myope often benefits from them.

By her early twenties her Rx should stabilize,but do not be surprised if it is about -15,or so.


Ava 01 May 2014, 23:51

The nurse at my daughter’s school said she needs new glasses, so I took her to the optical shop where she got her current glasses. The eye doctor was out but a technician tested her eyes and gave me a printout. The technician also put a copy into the file. She said my daughter’s vision got a lot worse and she can’t see the board properly with her glasses. Can someone tell me if she needs new glasses, or if the shop is just trying to make a sale? She is 17 and has had glasses since kindergarten.

The prescription she got last September is:

R -9.00 -0.50 95

L -9.50 -1.00 80

The printout we got today is:

R

-10.00 -0.75 92

-10.50 -0.50 94

-10.25 -0.50 97

-10.00 -0.50 89

L

-11.00 -1.00 93

-11.00 -1.25 93

-10.75 -1.25 90

-11.00 -1.25 93

Is that enough of a change for her to need new glasses?

Is it true that her eyes got a lot worse?

Why are there 4 lines for each eye, with different numbers? It doesn't give me much confidence in the exam they gave her.

Should I get a 2nd opinion?


Jill 29 Apr 2014, 22:08

I uploaded a few photos of my current specs with 4 BI prism in each eye. https://imageshack.com/user/jillybean74


Jill 29 Apr 2014, 12:50

My appointment was a few months back and the doctor said I was "borderline" for needing progressives/bifocals but expect to need them in the next year or two. My main question was how would this be different for needing prisms and bifocals/progressives at the same time. With the three components all is my glasses minus lenses/prism/reading add, how tough would that be to get used too and with the prism are progressives a better fit than lined bifocals. I have gotten used to the prism over the last 10 years or so. When I first needed prism I thought it would be a huge deal, because I was primarily a contact lenses wearer but especially when my prism increased over the years got used to it and I've been lucky its stayed at 4D BI in each eye and not progressed any farther.


Soundmanpt 29 Apr 2014, 12:25

lola

I just noticed your post and I am sorry I didn't see it before. But I don't think you were given "prisms" for your astigmatisms. If you have copy of your prescription those new numbers should be in the boxes under CYL. That is just a slight change in how they make your glasses.


Soundmanpt 29 Apr 2014, 12:18

Jill

If you were able to tel an improvement at the doctors office with the add that means you do need it and by holding off even though you feel as if your close vision is still all right, it isn't. Reading and other close work is now straining your eyes and if your eyes likely get tired out much easier these days when your doing close work. The add would relax your eyes and made doing close chores much more tolerable. Also by getting the add now i'm sure it would be just a very weak add and very easy for you to get used to. Remember by getting progressives unless you tell people no one will even know there bifocals.


DaveV 29 Apr 2014, 11:46

Jill, I just got my progressives for the first time and I find it a lot easier. The adjustment was easy. You should just go ahead and get your add.


Cactus Jack 27 Apr 2014, 02:09

HighMyopic,

You can at cactusjack1928 @hotmail.com, but I can tell you up front that I don't have an absolute answer. I suspect that glasses of that power have to be made by specialty labs and not your typical online retailers. That said, you might try Optical4less. They used to have a Special Makings Department that were quite good at unusual and high prescriptions. However, they are not cheap.

You asked if you were legally blind and I tried to answer, with a questions about your Visual Acuity, which is typically the Snellen Fraction that indicates which line you can read on a Snellen Chart. In English units, 20/20 is normal vision, which means that you can read the 20 ft line at a distance of 20 ft. or in Metric units 6/6 meaning you can read the 6 meter line at a distance of 6 meters. BTW, 20/20 or 6/6 is considered "normal". The lines below that one 20/15 or in rare instances 20/10 are considered "perfect" vision, but with that VA, you are approaching the limits of the number of rods and cones in your retina.

If you need -5.50 correction in your Left eye and -4.50 in your Right, I can assure you that your vision without correction is much worse than 20/200 and the big E at the top of the chart is likely a blob. However, that is NOT legally blind. "Legal blindness" is a defined legal term which can vary some, depending on where you live. In the US, Legal Blindness is generally defined at having a Best Corrected Visual Acuity (BCVA) of less than 20/200 in your best eye. If your vision can be corrected to better than 20/200 with contacts or glasses, you are not Legally Blind and are not eligible for disability benefits.

C.


HighMyopic 27 Apr 2014, 01:31

Im not sure. Can I email you about a question that I have about ordering a -30 diopter pair of glasses?


Cactus Jack 27 Apr 2014, 01:23

HighMyopic,

What is your best corrected visual acuity in your best eye?

C.


HighMyopic 27 Apr 2014, 00:57

I am -5.50 left eye and -4.50 right eye. Am I legally blind?


Clare 24 Apr 2014, 14:51

George1968 - I'd say I'm 80/20 glasses/contacts. If at home I'll wear glasses but if going out wear contacts. If out with close friends I'll probably go with glasses. At work I rarely wear contacts now. I still feel that contacts = making the effort to look my best!


George1968 24 Apr 2014, 06:30

Clare,

How are things going? Are you still wearing contacts part-time, or are you just saving them up for special occasions given your problems with them?


Clare 23 Apr 2014, 15:06

Jill - I have two friends who've gone to progressives with no problem at all, both say it was very easy to get used to them. Good luck. I take heart from their experience.


Jill 23 Apr 2014, 14:57

Thanks Roy. I'm hoping to hold off on the bifocals for as long as possible, ha ha. I haven't noticed any real trouble seeing up close yet, but when they did the test at the doctors office and my doc showed how an add would help, it did brighten things up a bit, up close. But I'm coping fine with my single vision prism glasses for another year. Still can't believe I'll be 40 already later this year. The joys of growing old.


Roy 22 Apr 2014, 06:19

Jill,

I am in my mid-sixties and have successfully combined progressives with prisms in my glasses for over 20 years with no problems. I am around -3 sph in my right eye and -5.5 in my left and have prism correction of 10 BO + 2 BD right eye and 10 BO + 3BU left eye. My add is up to 2.75 now.

I went straight from single vision to progressives without ever having lined bifocals and have had no problems, except some difficulty with intermediate vision for computer work when I reached the age of about 60. To avoid having to tilt my head back to see the screen clearly I bought an extra pair of progressives with intermediate correction at the top and near at the bottom. However at age 39 you will not have this problem.


Jill 21 Apr 2014, 17:42

Its been a few years since I visited this board, I'm 39 years old, have been pretty much a full time glasses wearer for the last 10 years, I got glasses during my school days but switched to contacts soon after and wore mainly contacts until I was 29 and needed prism in my glasses. I started at 1D BI in each eye and moved up to 4D BI in each eye at 35 and luckily I've stayed stable both with my distance script in the -5's and my prism at 4D BI in each eye. When I went for an eye exam last month my doctor told me I was starting to get borderline to needing bifocals or progressives and could need them by next year. I was just wondering for those readers to this site that wear prisms and bifocals, how difficult of an adjustment was it? Is it any different than normally adjusting to bifocals if I didn't have prism in my glasses? Is it easier going with progressives or lined bifocals? I'd like to stick with the no-lined bifocals because even though I'm approaching 40 I still feel much younger than my age.


lola 20 Apr 2014, 12:36

haven't been to this board in ages and ages, but just got my new prescription and it made me feel nostalgic...

left eye -1.75

right eye -3.00

only a slight change from what i've had in previous years, but there's a new addition! for the first time my doctor has figured out that i have a slight astigmatism, so i also have a prism now. +0.25 in the left eye and +0.75 on the right. this is the first time i've had this so i'm not sure what it means. i just got two pairs of glasses with it and my vision is so much better.


Cactus Jack 11 Apr 2014, 21:55

Rex,

Vision occurs in the brain, your eyes are merely biological cameras. The brain is capable of doing some very sophisticated image processing of blurry images, but it takes a lot of extra work. When you wear contacts or glasses to correct your vision, your brain quickly gets used to not having to do the extra work and it is pretty common for most people to notice apparently increased blurriness without your contacts or glasses.

FYI, the difference between glasses and contact lens prescriptions only occurs above about -4.50 or +4.50. The difference is caused by vertex distance effects of glasses or phoropters or trial lens frames where the lenses are typically about 12 mm away from your cornea. Vertex distance effects are related to the mathematical square of the glasses prescription. At -1.25 they are insignificant. Let me know if you are interested in how that works.

Hopefully, you have had some instruction from an Eye Care Professional about hygiene and care of contact lenses. Also how much you can safely wear them. The most important issues about wearing contacts is oxygen permeability and tear film. Both are very important for care of your corneas. The corneas have no blood supply and must get oxygen from the air and moisture from tears. Ideally, the contacts float on a thin film of tears that gets constantly refreshed. The key is comfort. If you notice any discomfort with your contacts, do something about it.

The idea that a person with a prescription of -1.25 does not really need glasses is frankly, bunk. Without correction you cannot see clearly beyond 80 cm or 31.5 inches. Squinting may help some because of what is called "pinhole" effects, but that is not a good way to go through life. Clear vision should be comfortable and effortless.

C.


Rex 11 Apr 2014, 20:06

Coz I like the new vision with contacts I have been wearing most days. But I now find on days I don't wear contacts it is much harder to see signs. Is this a bad sign?

I don't like wearing glasses but struggling without.

Is it ok to go wear contacts all the time?

If not should I rest eyes or wear glasses more?

I still feel a weak lens to be concerned?


mikedorb 07 Mar 2014, 22:55

Why does your wife feel you don't need glasses? It sounds like it is because her vision is much worse than yours and she has no choice but to probably wear correction full time. And if you you are a person who doesn't want to tolerate any blur and you said you squint when not wearing correction then by all means wear your contacts or glasses full time. Absolutely. That is your decision and nobody else's.Nobody else knows how you see.


mikedorb 07 Mar 2014, 22:43

What is your glasses prescription? Is it like -.25 stronger than your contact lenses prescription?A lot of times the two are different from what I have read. But whatever it is I will say what others have said here in the past. You don't need anybody's permission to wear your glasses and you wear them for your benefit and nobody else's. So if you feel you see well wearing them full time and you like the way you look in them go for it and wear them full time.There is no minimum prescription for someone to wear glasses full time. It is personal choice.


Rex 07 Mar 2014, 22:25

To add

My wife who is-5.50 thinks I don't need glasses. I feel I would just like to wear contacts or glasses (which are more comfortable)fulltime rather than squint? Am I too sensitive to blur?


Rex  07 Mar 2014, 22:13

-1.25 contacts which give crisp vision.

My glasses are 'weak'. What minimum prescription can I wear glasses (which are so much more comfortable) fulltime, without comment?


mikedorb 07 Mar 2014, 19:22

I don't know if she would be legal to drive if she had to pass an eye test.I have my doubts because her left eye is quite hyperopic with a moderate amount of astigmatism. But Cactus Jack could not give me any kind of an estimate of what her vision might be in that eye because there isn't a direct relationship between refractive errors and vision acuity. I would like to have a rough estimate as to her vision acuity in that eye but I guess that isn't possible. Are we talking 20/70, 20/100, 20/200? I guess nobody knows except Chris' eye doctor. Am I missing something because I don't have the knowledge that some others here do but wouldn't the odds be that Chris having less accommodation than someone say 20 years younger than her would likely have poorer vision acuity than a younger person with a similar level of hyperopia?

I don' think my distance vision is terrible but I wouldn't dream of driving without glasses, especially at night. I want to have the best possible vision I can have and that means wearing my glasses for driving. So for me it is irrelevant whether or not I can pass a motor vehicle eye test or not without glasses. I wish I knew what Chris' vision is without glasses. All I would say is it is likely to be something less than 20/20 but how much less I have no idea.But she chooses to not wear her glasses and there is nothing I can do about it.

Another strange thing that Chris does is wear non prescription sunglasses all the time for driving even when it is cloudy out or at night.That one I can't figure out at all. But on several occasions she almost went into a state of panic because she couldn't find her sunglasses. I don't think she can drive without them and they aren't even prescription. I would think that the glasses would make her vision even worse when it is cloudy or at night than it ordinarily is. I don't see how non prescription sunglasses could possibly improve her vision especially when it is cloudy or at night. As a joke I have thought about hiding her sunglasses when she goes to bed and then see what happens the next morning when she has to go to work and can't find them. But I can't be that mean.

About a month ago I had an eye exam and it was a bright sunny day so they gave me shades to put over my regular glasses when I drove home because of the drops in my eyes. Since Burger King was on the way home I stopped there for lunch but decided to keep the shades on. I walked into the restaurant and it was kind of an eerie feeling because everything was so dark inside. I ordered my food and ate there but while doing so was thinking about Chris and wondering about how she could drive when it was cloudy out or at night wearing shades. Because I don't think I could.I really don't know how she does it. Maybe it has to do with me not being used to driving with sunglasses. But I don't drive long distances or overall that much and because I am on a fixed income I could not justify spending money on a pair of prescription sunglasses. I wouldn't get enough use out of them to justify the cost. But I could not even imagine wearing sunglasses when driving at night or when it is cloudy out. I don't drive much at night and neither does Chris but with Chris having something less than perfect vision and on top of it wearing the sunglasses honestly I don't know how she sees anything at all.


astigmaphile 07 Mar 2014, 17:57

Mikedorb,

I realize that how much a person wears their glasses is a personal decision. However, if their vision is less that 20/40 they are not legal to drive in most states. I would hate to see her get in trouble because her visiobn just wasn't good enough for driving, especially after dark.


mikedorb 07 Mar 2014, 13:22

Cactus Jack

Thank you so much for your quick reply. You are right on about everything you said about Chris even though you don't know her. Chris has a very strong personality who always thinks she is right about everything. She challenges everything I say even factual information so I learned a long time ago to not fight her on anything she says. Just let it go and let her find things out by herself. She thinks she is right about everything and everybody else is wrong. So no way I will say anything to her about wearing her glasses full time. I might think that she should but that is her decision. I agree with you that it is personal preference or choice. And the more you push someone to do something, especially someone as stubborn as Chris is, the less chance there is of that person doing the thing you want them to do. But when something happens to her new glasses I don't want her to come crying to me because I am not going to be very sympathetic. I told her before that if she was that unhappy with the place she should go to another place to get her eyes examined and new glasses. But Chris decided to go back to the same place. If I was as unhappy as she was I think I would have found a different place to go. I have no personal experience with the place as I never went there myself to get my eyes examined. But something seems strange about that place. Her appointment was done in a half hour and that included time to pick out new glasses frames. I never had an eye exam that took less than 45 minutes that I can remember. I asked Chris some questions about the exam. I asked if they put drops in her eyes and she said yes.Then I asked about a refractive exam and she said she didn't know what that was. Then I told her that is when they put different lenses in her eyes to see which ones she can see better with and they should do it both for close and distance vision. She told me that they never tested her eyes without her glasses and just had her read some lines wearing her glasses. That sounded very strange to me but with Chris you never get the whole story. But being in and out in a half hour makes me wonder what kind of eye exam they gave her. I talked to a couple of other people as well and they never heard of an eye exam being that short. Knowing Chris she probably didn't spend much time picking out frames. She figures she won't be wearing the glasses much so it wouldn't surprise me if she just took the first thing she tried on. And once she picked out frames then they had to do measurements so you figure that would have taken a few minutes. Doesn't sound to me that the actual exam was more than 20 minutes. Chris wanted no part of metal frames this time because she feels they are not sturdy enough so what she might have done is ask them for the strongest plastic frame they had. I will wait for the plastic frame to break and listen to who she blames this time. Because if she continues to drop her glasses on the floor and they break how is it not her fault? And if she loses her glasses she is really in bad shape. Because her insurance only pays for one pair per year and Chris works in a low paying retail job so she could not afford another pair of glasses.She would then try to get by with store readers but would be unlikely to find any strong enough to really help her that much especially considering the difference in the vision between her eyes.

So I guess it it impossible to figure out how well Chris sees out of her left eye. The only one who would know would be her eye doctor I would think. But another thought is I wonder if she would be able to pass a motor vehicle eye test without her glasses. Fortunately for her we live in the state of CT and that is one of only a handful of states that does not require a periodic eye exam to renew your license.You have to pass an eye exam to get your license and then never again. I think in CT you have to have at least 20/40 vision in each eye to pass the eye test. Maybe she can but I would have doubts that she would be able to pass with her left eye at least. And she also has a moderate amount of astigmatism in that eye as well and I don't know how much that impacts her vision.

But at some point even Chris might have to relent and begin wearing her glasses full time. But that is going to be entirely up to her. Nothing I could say or even if the doctor says something isn't going to get her to do it. I think vanity is a huge issue with Chris as you said. It is something she is going to have to do on her own terms. Maybe one day wanting to see is going to be more important to her than vanity. Then she will wear her glasses. But we might be looking so far in the future I may not be around to see it. And I find it unusual that her eyes haven't changed in about 4 years. Usually wouldn't someone Chris' age need a little more plus for reading over that period of time? I would have thought she would have needed a little more plus this time. I did Chris' income tax and she couldn't read the routing number on her debit card. Then she gave it to me and although the numbers were very small I was able to read it.

But it is comical when she talks to people on the phone and tells everybody about my terrible vision. I am sitting at my computer and want to start laughing. And these people who she is telling I am sure don't care one bit about my vision. For some reason she seems much more concerned about my vision than her own. I don't understand why. Chris' feeling is she only wears her glasses for reading and I wear mine full time so her eyes have to be a lot better than mine. But that is a personal decision. I choose to wear mine full time and she chooses not to. But how can she have any idea what I can see without glasses? Once again Chris thinks she knows everything about everything. But with me it was my decision to begin wearing my glasses full time. Nobody told me to do it. And it is going to have to be that way for Chris.But Chris is one stubborn woman.


John 07 Mar 2014, 05:03

Juicebox,

Excellent choice ! They look pretty.

Also, you were right for the lenses, you will not get those peuple reflections.

Could you take a photo of your glasses with the lenses and post it ?

Warm Regards


Cactus Jack 06 Mar 2014, 22:28

Mikedorb,

Please check Vision and Specs for a response, I am having some trouble myself with server errors on ES.

C.


mikedorb 06 Mar 2014, 16:24

My friend went for an eye exam on Monday and received the following prescription which she tells me hasn't changed in about 4 years. But she is going to get new glasses anyway.

OD +1.00 -0.50 75 Add 2.00

OS +3.00 -1.25 100 Add 2.00

She is going to be 52 years old later this month. I do understand some about eyeglass prescriptions but what strikes me as unusual is the difference between her eyes. I know there is often a difference but I would think 2.00 would be a lot. I do have a few questions.

1) Is my friend' script one which most people would wear full time? My friend just uses her glasses for reading and the computer. Once in a while she puts them on to see some script on the TV and then she takes them right off. And she never uses them for driving.

2) Any idea what my friend's vision acuity is in her left eye. it seems to me it wouldn't be very good. I can't find anything on the Internet that converts plus scripts to a 20 something number like you can for minus myopia scripts. And I know a person with a +3.00 distance script doesn't have the same vision acuity as someone with a -3.00 script. Plus she has a moderate amount of astigmatism in her left eye and I don't know how much that factors in. How blurry do you think her vision is in that eye? It seems to me that because of the difference in her vision between her eyes that she would be better off wearing her glasses full time but I don't know.

3) Could my friend have developed a lazy eye as a child that was neither diagnosed or treated and that is the reason that the vision in her two eyes is so different?

But what bothers me is she tells everybody she only needs her glasses to see small print and can see fine otherwise. She doesn't even say reading and she emphasizes the small print. So everybody thinks she has great vision but that is not what her script shows. She lives with me and I managed to locate it on Tuesday when she left for work and made a copy for myself. I have been curious about her vision for a long time because she has given me some indications that she is having trouble seeing even though she will never admit it. One thing she seems to do is blink much more than the average person does. Could that have something to do with the discrepancy between her eyes? But she says her vision is great and mine is terrible because I wear my glasses full time and she doesn't. Here is my script from an exam which I got a month ago. I am 60 years old.

OD +0.75 -1.00 160 Add 2.50

OS +0.75 -1.25 15 Add 2.50

How could her vision be better than mine? Her left eye seems very bad much worse than either of my eyes. And I don't think her close vision is better than mine either. Even in her better eye her distance script is .25 higher than mine even though her astigmatism is lower than either of my eyes. So I can't really compare how she sees with her better eye compared to me. But her left eye seems so much weaker than either of my eyes. Honestly I don't know how she manages to drive without glasses.Even her good eye isn't perfect for distance. I don't think my distance script is that much and I wouldn't even think about driving without glasses.It is my choice to wear my glasses full time like it is her choice to wear hers only for reading and the computer. You can't compare the vision between two people based on how much they wear their glasses. Some people won't tolerate any blur and other people don't mind walking around even if things are quite blurry. It is personal choice.If Chris thinks I am blind then she is too.

But I have suggested to her that maybe she should wear her glasses more than she does.And she won't hear of it. She had a lot of problems with her last glasses. She got a metal frame and because she always keeps her glasses on the top of her head, on her shirt or loose in her purse they are always falling on the floor. No wonder she is constantly dealing with broken glasses and lenses popping out. And Chris doesn't believe in eyeglass cases as she never keeps her glasses in the case when she isn't wearing them.She blamed her glasses breaking on the place selling her a cheap metal frame. So this time she got plastic which she thinks will be more durable. OK but I can't get it through Chris' head that the problem with her glasses breaking has nothing to do with the frame, the place she bought them from or the lab and has everything to do with how she handles her glasses. If glasses are constantly falling on the floor there is a great chance they are going to eventually get damaged or broken. Unless she changes what she does with her glasses she will continue to have problems and I don't think she is planning to change anything. And she has lost her glasses in the past as well.I am sure the new plastic ones she is getting will break too probably sooner than later.

With the difference in vision between her two eyes along with the problem she has with her glasses breaking all the time I think full time wear would be best for her. If the glasses are on her face they are not likely to break and she won't lose them. Much more can go wrong with glasses when you aren't wearing them than when you are. I have worn glasses for over 50 years and never lost a pair or had them break. But Chris is worse with glasses than anybody I have ever seen in my life. And watching her constantly take them off and put them back on makes me nervous. She wears bifocals so why not just leave them on? I know she would likely see much better at all distances wearing her glasses. I could never deal with the on and off stuff. I first got progressives when I was about 45 years old and that is when I went full time. I wonder if the doctor ever suggested to Chris as to when she should wear her glasses. If he did I know she wouldn't tell me. But my experience is that most doctors and opticians don't offer advice unless you specifically ask. You shouldn't though have to tell a 52 year old woman when she should wear her glasses.


mikedorb 06 Mar 2014, 16:22

"Test"


Juicebox 06 Mar 2014, 09:15

John,

I got the normal plastic ones because the frames are quite thick plastic. I found them online and they are these ones ( http://www.designerframes2u.com/designerframes2u_shop/prod_2475434-Anna-Sui-Glasses-AS565-Demi-Purple.html ) They don't stick out or anything, so I don't see the point in paying the extra money for them. Also, people on here have mentioned that they aren't always the best choice anyway.

My optician said to still come back in six months rather than 12 as I still got an increase and my eyesight isn't fully stable, but he assured me that it's a good sign that my slightly worse eye only went up -0.5. Hopefully next time it won't go up and I can go back to annual visits.


GreginColo 05 Mar 2014, 22:45

Thank you Patrick for your uplifting and encouraging response to Sam who was concerned, and seemingly down in spirit, about his progressing myopia and the worry about future increases. You have hopefully given him confidence, that even with a minus Rx, as you mentioned, almost twice his, that good corrected vision is totally possible, and today's frames and lenses make such high correction much less obvious than when you and I were young.


Craig 05 Mar 2014, 20:06

This guy puts it all in perspective.

http://www.youtube.com/watch?v=USe186lsTnA


Patrick B 05 Mar 2014, 15:23

Sam --

No, I'm not blind!! In fact my corrected vision is quite good, especially with contacts.

My myopia began to slow down substantially by my late teens although it crept up a bit throughout my twenties and thirties. Now don't freak out but my prescription for eyeglasses is L -23.75 and R -22.50 with a minor bit of astigmatism. (My contact lens prescription is a bit less.) So I have a prescription nearly twice yours. The most important thing is that I have healthy eyes and I'm nearly 60. Today's lens technology is so much more sophisticated today so my lenses look quite good, especially when compared to what was available when I was a your age.

You might recall that I said most people don't really notice the power of lenses. Well, last Christmas I met up with a colleague I hadn't seen for a long time. This guy has a prescription, I'd estimate, of about -12. I guess this was the first time he had seen me in glasses and he actually asked me if I had to wear correction full time. Unbelievable that someone with his visual needs wouldn't note just how strong my glasses were!! I guess this just reinforces my earlier point.

It sounds like you're headed to the optometrist. Let us know how it goes.


Puffin 04 Mar 2014, 15:19

Sam (NSBB)

There's some truth to what you read about myopia getting worse simply because of being corrected, but how the eye will react to correction is not entirely predictable. If your ECP is finding that your myopia is really climbing quickly, then to slow it down a little, bifocals or being cautious about overcorrection when renewing prescriptions are options to consider. Or you can try an older pair of glasses for close work.

Learning to drive will help, you will be looking into the distance more. Perhaps you could try activities (eg, go for a walk) that get you away from study and close work all the time.

Unfortunately, the ECP has to think about clear distance vision now vs perhaps somewhat thicker glasses later on - and really the preference is that you can see clearly now.


GreginColo 04 Mar 2014, 14:32

Hello Sam (aka Nsbb); in addition to what Patrick and Cactus Jack have already mentioned;

1) it seems like you do a lot of computer work and reading, so when you get new stronger glasses for distance vision, you may want to keep you older ones for reading and computer work as this may make it easier on your eyes and then use the stronger ones for crisp distance vision. I know its a pain to swap glasses but a lot of us do it.

2) as you approach the age where, depending on where you live, you can learn to drive, you will want to keep your distance vision as clear as possible even if that means updating your Rx annually or semi-annually. I know that may require more cash outlay but there are on-line sources that make glasses within your Rx, and even a lot stronger, at a very reasonable price, and with wide options of lenses and attractive frames. Keep us posted.


Not so blind boy 04 Mar 2014, 13:46

Hi Patrick,

Thanks for your reply. Yeah, you're right about it not looking too different but I read that stronger lenses can make your eyes get worse quicker and I don't want that. When did your eyes stop getting bad? How bad did they get? Can you still see (if you don't mind me asking?)

Sam


john 04 Mar 2014, 13:27

Hi Juicebox,

Thank you for the update and congratulation for your new glasses.

Did you got normal plastic lenses or did you go for high index ?

What was the comment of your optometrist ?

Did he think that your nearsigntness is now stabilized ?

When do you have to go back ?

Thank you to keep us so well posted


Patrick B 04 Mar 2014, 12:20

Hi Not So Blind Boy --

When I was your age I was going through a similar myopic progression and felt quite discouraged. Nevertheless, there's nothing you can really do about it other than get a new prescription and enjoy good sight once again. Most people don't understand glasses or their relative strengths so don't worry about about anyone spotting your new and stronger lenses. What people will notice, however, is if you're squinting to see things in the distance; pushing your glasses up against your nose to see better and/or tilting them which increases their effective strength.

As you have probably learned, after a certain level of myopia (say, around -9/-10) you really can't see unaided any longer so higher prescription levels become, well, "whatever". A -12 prescription really isn't much worse than a -10 when you take your glasses off.

You might want to see if your parents will spring for lenses which have the highest refractive power, and your optician should be able to direct you to frames which, when combined with high-index lenses, help minimize lens thickness. And glasses are considered very cool now which they weren't when I was fifteen.

Myopic progression like ours generally slows down when growth spurts have stopped. So ... don't worry about something over which you have no control.

Let us know how you make out with your eye exam.


Juicebox 04 Mar 2014, 10:16

Hi John

Yes, I did get an increase, but it was pretty painless in that I only went up -0.5 in one eye and -0.25 in the other (I think).

R: -4.25 -0.25 165

L: -3.75 -0.25 25

I went glasses shopping with the boyfriend and he was super helpful. For me, I know that my friends will tell me that I look good, even if it's not the case - not that it's a bad thing in general terms, but when it comes to fashion/style it's not all that helpful. Whereas my boyfriend was honest and at one point laughed because a pair looked so bad "they're nearly the same size as your little pea head" I think was the quote when trying on a more hipster style. We have a very laid back relationship and have a very similar sense of humour and I think that was key in picking out new frames as he could just be honest, there was no treading on eggshells.

I managed to find an amazing pair that were available in a 48mm eyesize, which NEVER happens. It seems most start at 51mm and they are too big. They are by Anna Sui and are tortoiseshell on the outside and glittery purple on the inside, they also have the trademark Anna Sui roses on the outside. The glitter isn't too obvious though, so were I to wear them to work, they would be smart enough, but still a little quirky.

Hope you're well :)


Not so blind boy 04 Mar 2014, 08:59

Hi all,

You're right, at least I'm not blind with my glasses, although at the moment it feels like it - I can't see for sh** even with them at the moment! I think it's time to make an appointment with my eye doctor :(

1, Where do you live?

I live in the South.

2. Do you have an Eye Care Professional (ECP) who specializes in treating Myopia?

Uh not so sure. I see the same guy I have seen since I first got glasses when I was 6 (and then I really was blind - boy did I need glasses then!).

3. What are your interests in school?

Math, math and more math! I also like languages but I want to do Math at college.

4. Do you read, use a computer, tablet or smartphone, a lot.?

Yeah. I read a lot (mainly fiction) and I use my smartphone and my computer.

5. Have you had any Math or Science courses?

Yeah. I've taken advanced calculus and algebra and I like Physics, Chemistry and Biology lots.

6. Are you interested in how things work?

Yeah. Maybe would like to be an engineer.

Thanks, Sam


Soundmanpt 04 Mar 2014, 00:37

Revolver

You are correct that the doctor does measure the PD as well, but it is considered part of the buying of glasses and is done by the optician as well at that time. Your right the biggest chain in the world that owns most all of the big name stores is of course the main one that won't provide a PD. They include Lenscrafter's, Pearle Vision, Sears Optical, Target Optical and many of the J.C. Penny Optical, as well as Sunglass Hut. Oh and by the way they also own many of the larger designer frame companies including Oakley and Ray-Ban. Now they also have their own vision insurance company. Can you see a trend here? They are trying to control the entire vision industry. If they do they will certainly drive all the small shops out of business. This is why I highly recommend that when anyone is making an appointment to get their eyes examined they ask first if they can have not only a copy of their rx as well as their PD. If they say they won't provide the PD then simply say well that's too bad then I will call someone that will. It's funny most all the other smaller retailers don't have a problem with providing the PD. The biggest of them all is scared of the on line retailers. So best way to make them change their policy is to boycot them. People complain about Wal-Mart driving small business out, but even though I am not a big fan of Wal-Mart this huge company is far more dangerous because of how excessive their prices are. They all have the highest priced exams as well as glasses. You would think the fact that own the companies that makes the frames and lenses the prices should be going down not up.


Revolver 03 Mar 2014, 20:52

Re Mags postings: Soundman, they do indeed measure PD as part of the exam, every patient record I've ever seen has it. But you're right, Mag didn't buy glasses there so they didn't release it and these days due to online bargains you'll have to pry it out of them. And, under law, the rx is yours and they have to release it...but, they don't have to release the PD as it's part of the fitting not the PD.

Mag, how much the glasses help is partially dependent on your dominant eye. If it's the -.50 eye it would have less impact than if it's the non-dominant. The dominant will take over in your brain and give you the best distance VA from the dominant eye.

Soundman is right, even that low an rx will help especially driving at night and especially with AR coating. Besides, why the reluctance to wear what is now a big time fashion statement?


Soundmanpt 03 Mar 2014, 19:26

Mags

The reason they didn't provide you with your PD was because you weren't ordering glasses. The eye exam doesn't include measuring your PD as it is a function done after you have picked out the frames you would have wanted for glasses. Since you used to wear glasses before you got lasik if you recall after you had picked out the glasses you wanted the optician sat across a small table from you and he or she looked into something that looked like a viewer and you looked through the other side. That device was what they used to get that measurement. But it is very simple to do and there are several ways to get it. One way is to find a well lighted room such as a bathroom and by using a ruler that has millimeters on it. As you you know your pupils are the small dark spots in the center of your eyes. So by standing back and looking straight ahead measure from the center of your left pupil to the center of your right pupil. This number is usually between 26mm and 62mm. Another way is to have someone do it for you and it is best to do it several times and use the number that comes up most often. To be honest your prescription is so weak that even being off a millimeter or two wouldn't hurt anything.

I totally agree with Cactus Jack the prescription you got is as you know pretty weak but I think even though you are still legal to drive without glasses they would make a nice pleasant improvement on driving after dark. You would also benefit by wearing them if you were at a sporting event or a concert. They will just make things a little bit clearer and sharper. I think Cactus Jack was saying your corrected vision would be about 20/15. My guess is your uncorrected vision is likely closer to 20/30.

I highly recommend Zenni (zennioptical.com) the glasses are very good quality and they offer more than 4,000 to choose from and more than half of them are under $20.00 complete. The only option I think you should get because it is so cheap is the AR coating They offer 3 versions but I always only get the $4.95 option and I have never had any complaints and I have sold several hundred over thee past 11 years. If you decide to get glasses from Zenni or any other on line retailer if you come back in here I can provide pointers on how to be sure they will fit you proberly.


Mags 03 Mar 2014, 18:49

Thanks for the swift response.

I am 32, and my occupation requires me to sit at a computer for large sections of the day.

You mentioned PD, how do you measure PD? Why would this not have been done at the eye test?

If I have clear and sharp vision 20/15 I still don't understand why I need the glasses? What causes your eye sight to detererate over time and can this be reduced in someway?

It is depressing at the thought of having to get glasses again after getting them zapped not to have too and costing a lot of money.

M


Cactus Jack 03 Mar 2014, 17:22

Mags,

You didn't mention your age, which would offer a clue regarding Axial (true) Myopia or Pseudo (false) Myopia. Both have the same effect on your vision, they just have different causes. Also, your occupation and how much close work you do.

With that simple prescription, I would consider ordering some low cost glasses, online. Zenni Optical offers glasses starting at about US$7.00 plus shipping for the least expensive frames. The glasses would be particularly useful for driving or in low light conditions. You have all you need to order, except your Pupillary Distance (PD), which is easy to measure.

"Normal" Visual Acuity is 6/6 or 20/20. With the prescribed correction you have 6/4.5 which is the same as 20/15. Everything will be exceptionally sharp and clear.

C.


Mags 03 Mar 2014, 15:56

Hi,

I got my eyes checked last week my prescription is as follows sphere right -0.50 left -0.75 distance acuity right 6/4.5- left 6.45- everything else is 0.

I got told I need glasses for distance but I am legal to drive! Do I really need glasses with this prescription? I wasn't sure if they were just trying to get money out of me.

I got my eyes lasers only 5 years ago and I previously wore glasses and contact lenses, struggling to get my head around needing glasses again soon.

Any advice would be great! Thanks


Cactus Jack 03 Mar 2014, 10:26

Blindboy

Hi Sam, welcome to Eyescene. I agree with Greg that you need to quit thinking of yourself as "blind". If your vision can be corrected with glasses, you are not blind by any definition.

You have progressive myopia complicated by moderate astigmatism. Your myopia is probably inherited and honestly there no way to stop it from increasing, but you may be able to slow it some until it stops on its own in your late teens or early 20s. At some point, you may be able to consider refractive surgery (Lasik, PRK, or Intra Ocular Lenses), but that is not a really good idea until your vision stabilizes.

What you can do, starting now, is learn about vision and how the optics of your eyes work. You need to know this so you can effectively manage your myopia.

A few more questions. Some may seem unimportant, but please answer as best you can. There is a reason for each question.

1, Where do you live?

2. Do you have an Eye Care Professional (ECP) who specializes in treating Myopia?

3. What are your interests in school?

4. Do you read, use a computer, tablet or smartphone, a lot.?

5. Have you had any Math or Science courses?

6. Are you interested in how things work?

Please remember that you are not the only young person with progressive myopia. I understand your concern about your glasses being unattractive, but there are some ways around that problem that are not necessarily very expensive. Also, don't pay any attention to comments by your classmates about your vision or its correction. Frankly, they probably don't know very much about it. You don't wear vision correction for their benefit, just for yours.

C.


GreginColo 03 Mar 2014, 09:02

Blind boy (which is probably not the best name for you); Others will hopefully be able to weigh in on this better than me, but I would hope you will be able to become more positive about your need for vision correct by choosing frames and lenses which are most suited for your look and activities and a supportive vision care professional should be able to help you with this. Your myopia is most likely of a genetic nature and will probably continue to worsen until you are in your late teens or early twenties, and there is probably little if anything you can do to change that. Delaying a needed prescription change would probably just call further attention to your need for strong vision correction, so I would do my best not to be discouraged by such increases but rather to use them as opportunity to try the latest fashion look in frames and latest technology in lenses. You don't say where you live, but hopefully your parents will be supportive of this approach. Keep us informed please.


John for Juicebox 03 Mar 2014, 05:16

Hi,

Did you had time to go for glasses shopping this WE ?


Blindboy 02 Mar 2014, 12:27

Sorry I didn't put enough detail in before. I'm 15 and my mum wears glasses for reading and my dad is almost as blind as me! I know my glasses are stronger than his now but not much. My sister wears glasses too but not as strong as me and my dad. My prescription is -11.50 -2.25 173 -12.75 -2.00 154. My right eye has always been weaker. I know I need stronger glasses but I got new ones before school started in August and I don't want any stronger lenses because they're really ugly but I can't even see the board anymore :-( How can I stop them getting worse?

Sam


Cactus jack 01 Mar 2014, 18:07

Blindboy,

You really did not provide enough information to offer an answer. You did not provide your current prescription or other recent prescriptions that help. How is your vision with glasses? Do your parents or grandparents wear glasses like yours?

We are happy to answer your questions, but you have to help us with the best information you can provide.

C.


Blindboy 01 Mar 2014, 17:23

Hi all. I'm 15 and my eyes are really bad and keep getting worse :( when will they stop? I wear glasses since I was 6 but now they are very ugly and strong. Please tell me when it will stop. I want to go to college but not if all the studying will make me blind.


Cactus Jack 01 Mar 2014, 13:19

Guest,

All that has happened is that the tiny text on your phone has revealed a long standing problem.

This will probably come as a surprise, but you already wear reading glasses and you probably have worn them for years. Every person who needs to wear a MINUS vision correction for distance has the same situation without their glasses. If you need a sphere correction of -1.50, your eyes focus at a distance of about 66 cm (26 inches) and every thing beyond that is a bit fuzzy. On tope of that you also have enough astigmatism, as indicated by the cylinder correction of -0.75, to mess up your vision at all distances.

Vision actually occurs in the brain and the eyes are merely biological cameras. The brain has amazing image processing abilities and if it knows what something is supposed to look like, it can do a lot of correction to a blurry image.

I think you will be surprised at what the world actually looks like if you get some glasses, but you need to be aware that they will take over the workload of correcting the blurry images and your brain will quickly get used to not having to work so hard. Your initial reaction is that the glasses have made your vision worse. Not true. All that has happened is that your brain has discovered how pleasant it is to let the glasses do the work and it will probably complain with headaches and fatigue if you don’t wear your glasses.

Unless you can get a deal, I would not get a 2nd pair of glasses, yet.

C.


guest 28 Feb 2014, 10:40

After struggling to see the screen on my ifone in recent months I recently went to get an eye test. I am 60 and have never worn glasses before. I assumed it was the onset of needing reading glasses but the optician said I was slightly short sighted and needed glasses for distance as well as for close up.

I came away with the following prescription: LE -1.50sph, -0.75cyl x 30 RE -1.50sph, -0.75 x 165 ADD +2.75 both eyes.

I was a bit shocked and so far havn't had any made up, not sure what to do, they said I need to get 2 pairs?

thanks,

Dave


John 27 Feb 2014, 13:27

Hi Juicebox,

How was your visit today ?

Did you got an increase ?


Soundmanpt 20 Feb 2014, 11:05

Josie

The idea of GOC is tried and proven. What you stand to gain is that by putting the largest portion of your SPH power in your contacts and not including any CYL (astigmatism in them your contacts should be far more comfortable on your eyes and that means your eyes should be much more able to tolerate them for longer time. Then putting only the remaining small portion of your SPH in your glasses along with all of your CYL should give you perfect vision and your glasses will look nicer with both lenses being about the same power.

Your doctor may or may not approve but you just need to make him understand that your not happy with the looks of your glasses with the unbalanced lenses. I can assure you what Cactus Jack is suggesting to you in no way harmful to your eyes in any way.

Be sure to copy what Cactus Jack has written for you and give the numbers to your doctor. I am sure after he reads them and adds the numbers together for your contacts and glasses he will see that you are not changing your prescription at all.


Cactus Jack 20 Feb 2014, 10:24

Jozie,

No way around that. Just remember that people tend to notice frames more than they notice the lenses. If they ask, just tell them that you are trying an experiment of using both contact lenses and glasses to improve your vision and comfort. Remember, you don't wear vision correction for their benefit, but for yours.

C.


Jozie 20 Feb 2014, 09:59

Cactusjack and Andrew. Well your discussion have persuaded me that I should at least ask my optometrist about the GOC. Now I wear 2 different types of lenses and my left is more hard to tolerate. So maybe this is a partway solution. The only thing won't it be weird to switch from thin glasses with GOC to my regular thick glasses when I am in a situation when contacts lenses are not possible? I think people will notice, won't they? (Even regular people who dont love glasses?)


Andrew 20 Feb 2014, 01:15

Jozie,

The idea of GOC is very normal indeed. Contact lens wearers of my age (48) usually have to have reading glasses around to help us to see near things. I could go for monovision to take out the need for the reading glasses, but as I wear "normal" glasses the rest of the time, this would be something of an inconvenience. Therefore, what I do is what is best for my eyes, which is how CJ is trying to help you by getting you to consider options which might not normally be suggested when you go to get your eyes tested.


Cactus Jack 19 Feb 2014, 20:23

Jozie,

GOC for vision correction rather than just to enable a person to wear a very different prescription that they actually need, is a relatively new idea. It is very hard to get an accurate refraction as the glasses prescription increases because of Vertex Distance effects. Vertex Distance is the distance between the front of the cornea and the back of the lens in your glasses or the first lens in the phropter. It is typically about 10 to 12 mm and at high prescriptions, the accuracy of the refraction can be off by a significant amount. In your case, your 11.50 lens power can be off by 0.13 diopters per mm of Vertex Distance and your 9.00 eye can be off by 0.081 diopters per mm. The reason is that Vertex Distance effects are the based on the mathematical square of the lens power. Vertex Distance effects are the reason why there is a difference between your glasses prescription and your contact lens prescription, because contact lenses have a Vertex Distance of Zero. For minus prescriptions the contact lens prescription is always LESS than the glasses prescription.

There is at least one ophthalmologist here in Houston, who uses sphere only contacts for an accurate refraction of people with high prescriptions. He will fit people who have high prescriptions with sphere only contacts to partially correct their vision to less than -1.00 or -2.00 and then do a refraction. At those powers, Vertex Distance errors are tiny and can be ignored. Based on the results, he can accurately calculate their actual prescription for both contacts and glasses while considering the Vertex Distance effects in the glasses.

One thing about combining contacts and glasses for the best correction is that you can choose the brand and type of contacts for comfort and wearing time. Tearing action and moisture retention characteristics of the contacts can have a big effect on how comfortable your contacts are. Generally the thinner the contacts the better moisture and oxygen transmission from the air to the cornea. The cornea is the only thing in the body that does not have a blood supply. It requires oxygen just like every other part of the body, but it has to get its oxygen directly from the air or from the tears. A major source of contact lens discomfort is the cornea not getting enough oxygen.

C.


Jozie 19 Feb 2014, 18:12

to Like Lenses. Well my right lense seems less flatter than my left lense and the left one is much thicker. I have had comments about this a few times from people and I just say to them well I have bad eyes - so what? We all have our problems! But it still hurts no matter how much I try to not care! I notice it very much. This is what I want to get over and why what I read from you guys is interesting!


Jozie 19 Feb 2014, 17:58

Cactus Jack. Is this GOC you suggest a well known recommendition? I have never had this solution offered previous. I understand what you outline but I am not sure it would work for me because it means I would be using contacts even more than I am now and not sure I could tolerate that. But you also mention something about making my vision better between both eyes which would be very welcome. (It is very obvious to me which is my good eye and which is bad but I have learned to just live with that). So I will ask perhaps.


curious 19 Feb 2014, 11:26

Thank you for your information!


Cactus Jack 19 Feb 2014, 10:55

Curious about astigmatism,

Yes. Astigmatism affects vision at all distances so there is no "threshold". It is just more noticeable when reading small text at typical reading distances, but it also affects your ability to read distant signs. With only 0.25 of astigmatism, it may not cause too much problem, but it will increase fatigue.

FYI, +1.00 readers ARE near vision correction.

If you know your cylinder and axis, you can order prescription readers from Zenni Optical for less than US$20 including shipping. No need to bother with AR coatings or anything fancy and the optical quality will be better than typical Over-the-Counter readers.

C.


Curious about astigmatism 19 Feb 2014, 10:34

Will 0.25 make a difference in vision on 1.00 readers? Presuming no near of far correction is needed, what is the "threshold" at which correction would normally be prescribed?

Is there a similar "threshold" for distance vision?

Thanks!


Melyssa 19 Feb 2014, 07:45

Jozie,

It was the drop-temples that made me enjoy wearing glasses, with cat's-eyes second. I have bought a dozen pairs of cat's-eyes in the last few years.

It does take a bit of self-confidence to wear big, bold, and beautiful frames. All of mine are plastic, and what now would be referred to as large, even though in the 1980s some of those would have been called midsized. I do have some frames with lenses measuring up to three inches in diameter. Now those are oversized. My motto has been, "Love me, love my glasses."

If you can, go for a pair of cat's-eyes, whether they be black, brown, or your favorite color. If all goes well, you will get many compliments like I have received, even though I have thick CR39 lenses.


Juicebox 19 Feb 2014, 06:10

Hi John,

No, not yet. It is half-term here in the UK and the kids are all off school, so that's probably the reason they didn't have any appointments available until next week. I'm working on Tuesday and Wednesday so I booked in for Thursday.

Of course I will keep you posted.


john 19 Feb 2014, 04:35

hi Juicebox,

Have you had time to go the optometrist yet ?

Keep us posted


Likelenses 19 Feb 2014, 00:09

Jozie

Are your lenses both flat on the front surfaces?

Most people would not really notice the difference between your two lenses. The only thing that they would think is that your glasses are quite strong.I know you think that it is very obvious regarding your lense differences,and it would to some of us here that enjoy strong lenses,but to the average person ,no.

I wear - 10.5 for each eye,and if you are concerned about the thickness differences,there are a lot of trendy plastic frames that can hide that.

I would think that your glasses would be quite becoming.


Cactus Jack 18 Feb 2014, 23:00

Jozie,

Here is an idea that you might want to consider. Wear a GOC combination for sphere only soft contacts to correct most of your myopia and low prescription glasses that correct the remainder of your myopia and all of your astigmatism.

That may seem like a strange idea, but by choosing the powers of the contacts carefully, you would simplify your glasses prescription and balance the image sizes on your retina.

Here are some approximate numbers based on a current glasses prescription of:

OD: -9.00

OS: -11.50, -1.00 x 78

with an estimated vertex distance of 12 mm, that would translate to the following sphere prescription at the cornea.

OD: -8.25

OS: -10.00

If you wore the following power CLs

OD: -7.00

OS: -8.50

Your glasses prescription would be approximately:

OD: -1.25

OS: -1.50, -1.00 x 78

The ideal way to do something like this is with the assistance of an understanding Optometrist who would do a refraction with the contacts in place, to determine your ideal glasses prescription. It can also be done using calculation and perhaps low cost sphere only contacts and low cost glasses from an on line retailer such as Zenni Optical. Low prescription glasses from Zenni can be as low as US$20 including a low cost frame, the low cost AR coating, and shipping.

Let me know if you have any interest in pursuing this idea further.

C.


Jozie 18 Feb 2014, 21:23

To the Guest and Cactus Jack

Guest. The problem is that I sincerely don't like the way the thick lenses look even though some of you guys do. One guy once try to give me one lense in hi index (my worse eye) and the other in normal thickness but it still looked weird and also I didnt see as well, just uneven.

Cactus Jack. Thanks for thinking on this but really its not like I'm so bad off I can't see, I just switch glasses and contacts when needed, its just nice to know that there are a few guys out there with fondness for those in my boat!


Jozie 18 Feb 2014, 21:07

Melyssa. I wish I felt as good about the way I look in my glasses as you! Maybe I just have the wrong ones! I reeeeally like the cateye look and I have sunglasses in that shape so maybe I could try some real glasses like yours. Thx for encouraging! Jozie


Melyssa 18 Feb 2014, 15:47

Jozie,

Due to my inability to wear contacts (astigmatism and hard lenses being the main problems), I was resigned to wearing glasses forever. Fortunately, 30 years ago I got my first pair of drop-temples (I was around a -7.00 RX then), and I liked them so much I started buying more pairs, luckily at discount prices.

Since then I have branched out into cat's-eyes too, with 13 pairs of them to go with 16 drop-temples and 18 others, in my -9.00 RX. Obviously I wear eyewear for good vision, but it's always fun to match glasses with outfits whenever possible.


Cactus Jack 18 Feb 2014, 10:55

Jozie,

Let me think about your situation for a bit and I'll get back to you.

C.


Cactus Jack 18 Feb 2014, 10:53

Bill E.,

You can try it, but I suspect the astigmatism in your right eye will make reading uncomfortable. Astigmatism affects vision at all distances and makes text a bit blurry at all distances. The reason is that your cornea has more curvature in ne direction than it does in another. The result is that that eye actually has two focus points and strokes, the lines that make up the letters, will focus at two different distances depending on which way the lines run.

Astigmatism is pretty common, but there are lots of people who have no astigmatism and if they need vision correction the prescription will be sphere only. It is less common for people to have identical prescriptions in both eyes, but it does happen.

C.


Bill E. 18 Feb 2014, 10:11

About a year ago I got my first glasses that were bifocals. I thought I would be prescribed readers, but was told that I should also use -.50 for distance particularly at night. The readers prescribed were +1.25.

Call it vanity or whatever, but I only use the glasses for night driving and opted to use 1 contact lens in my left eye for reading.

The scrip was:

R: -.50 -.50 155

L: -.50

add 2.00

I basically made monovision by using the 1 contact.

I just went for another exam. After refracting me, he removed the machine and went to write on my records. I looked at the line that was still on the wall, and noticed I could read it with my left eye but not my right eye. I asked about that and he said that was because of the astigmatism that is only in my right eye. He left the prescription the same as last year.

So I am wondering...

When I wear the +1.25 contact in my left eye and go with no correction in my right eye, distance is a bit blurred. So why not wear the +1.25 in my right eye and enjoy the clearer distance vision of my left eye. I asked the Dr, and she said that the right eye is dominant so it is the one that should be corrected for distance. That doesn't make sense to me for my situation. Should I switch the +1.25 to my left eye?

Also curious to know if it is unusual to have no astigmatism.

THANKS


guest 18 Feb 2014, 09:50

What a good reason to go to Terra Verde !

been a while since I have been there. I remember stopping at baskinRobbins on way to airport. remember a tourist gwg talked to me about flavors-and I got my daughter am intern job in her law office in sanfrancisco!

log on zenni and get a pair for every day-different personalities...

get a pair or so at cr39 -not hi index - so when you meet a guy who likes glasses you have a real pair lol ! you will also have better night vision driving in the regulat thick cr39's at your rx.

they are all cheap, prob can get 7 or 8 pairs for 100$

:)


Jozie 17 Feb 2014, 23:55

CactusJack. wow so fast! Anyhow my complete prescription is right -9 with left -11.5 and -.1.0 x 78. I am 27 and I am a part time property manager but also a student. I live in Puerto Rico. What do you suggest? I am by the sea a lot as the property I work for is a resort which is where my contact problems sometimes arise! But then thats where glasses problems arise too so you can see I am stuck!


Cactus Jack 17 Feb 2014, 23:07

Jozie,

Could your provide your complete glasses prescription, your approximate age, your occupation, and where you live. Perhaps we can offer some suggestions that would be more comfortable and doable where you live. If you live where the humidity is low, it can make contacts uncomfortable.

C.


jozie 17 Feb 2014, 22:47

I have scanned through a lot of the threads on this site just now. I don't know what to really think, its weird, but I guess I kind of get it! You guys think chicks with bad eyes are cool! Okay here's my prescription: -9.0 in my right eye and -11.5 in my left. I wear contacts a lot of the time but maybe now I won't! (As much). Maybe there are other people around me who feel the same way and I don't even know? I might become more like Melyssa and get a few more pairs of glasses!! I like glasses for fashion but not mine. The thing is I hate how my glasses look because they are so different between the 2 eyes for one thing. Any advise about what to do about that? Oh and someone mentioned on here about how she hate it when she's wearing her glasses and takes them off and then everyone can see her but she can't see them? Well I'm with you sister I hate that too! Lots of good reasons for contacts in my world but I hate them in a way too! (they kill my eyes after a while) so this site might just give me some confidence to be a glasses girl more. Thx, Jozie


Disappointed 17 Feb 2014, 09:58

Erik

Not sure if you know what the numbers on her prescription sheet means? But she is pretty nearsighted and she has a decent amount of astigmatisms as well. So her uncorrected vision is very blurry. A good example is that sitting across from her at dinner if she wasn't wearing her contacts or glasses she would find it hard to recognize you. Her glasses numbers would even be slightly stronger than the contacts rx you saw.

Has she mentioned to you that she wears contacts? If so you should ask her how come she never wears her glasses? She may be reluctant to wear them thinking they may put you off. The type of contacts she wears for many can be somewhat uncomfortable because they often like to move around on the eyes and sometimes don't provide as good of vision as glasses do.


Likelenses 17 Feb 2014, 02:22

Erik

Her uncorrected vision would be about 20/700.

She would be a delight to see in glasses.Depending on the type of,and lense size they could be fairly thick,and have significant power rings.

You should ask her what her glasses prescription is,and surprise her with a pair that you could select on line.If you do specify CR 39 lenses,which would be the thickest.


Erik 16 Feb 2014, 23:14

My girlfriend wears contacts. Last night, while over at her place, I noticed a new prescription on her fridge door. I wonder how bad her vision is. Unbeknownst to her, I copied the numbers. OD -5.50 -1.50 95 OS -6.50 -1.25 80 diameter 14.2 base curve 8.6. Thanks.


Cactus Jack 11 Feb 2014, 08:46

William,

You and probably 99.9% of the human population are in a slow but steady spiral toward needing help to focus close. There are a very few people who do not develop presbyopia, but they are very rare. Everyone is different, but the +1.50s will probably be good for a year or so.

The only people who may ultimately be able to get by without external reading help are people who have myopia in the -2.00 to -3.00 range with little or no astigmatism. The reason for this is that they, in effect, have built in reading glasses and need to wear - glasses for distance. Presbyopia will get them also, but they have a choice of taking off their glasses to read or getting bifocals like many of the rest of us.

The fact that you can still read "normal" text with good lighting is typical because in this case, the principles of optical physics are working for you. You are experiencing the same phenomenon that photographers use, called "depth of field" or "range of useful focus". In bright light, your pupils narrow down to a small opening like a photographer adjusts the lens opening on his camera to keep from over exposing the film. This increases the range over which images will be in focus, without adjusting the focus. In low light, your pupils open up and the focus range is reduced.

The key thing for deciding if you need stronger readers is simply comfort. If you are straining to read, with the +1.50s, you need to try +1.75 or +2.00.

However, please don't use that convenience for avoiding annual or at least bi-annual eye exams. They provide more benefits than just checking your vision. The eyes are windows into the body and often, slowly developing health problems will have clues that can be detected when the examiner looks inside your eyes. Developing "silent" diseases such as high blood pressure and diabetes are often first detected during eye exams when they are mild and easily managed.

C.


william 10 Feb 2014, 22:38

If I read you correctly I am on a slow but sure spiral towards becoming dependent on the readers, and to avoid eyestrain strain the glasses will speed that up a bit on their way to stabilizing. While I admit I have trouble seeing small print, especially with lower light levels, I can still read "normal" print without the glasses. How long will this last with +1.50's. He said I could get along with over the counters, so the expense is no big deal.


Cactus Jack 10 Feb 2014, 18:59

William,

The reason I ask these additional questions is that Presbyopia, which is beginning to manifest itself, behaves differently depending on your age and basic prescription.

Presbyopia actually begins in childhood. When you are very young, the protein in your crystalline lenses has about the consistency of gelatin dessert. Your crystalline lenses and the ciliary muscles in your eyes make up the "auto-focus" part of your vision system and children usually have incredible accommodation range. As you get older, the protein in the crystalline lenses gradually gets stiffer and the ciliary muscles can no longer adjust the power of your crystalline lenses to allow you to focus as close as you once could.

For "normal" activities, this gradual loss of accommodation does not become a problem until around 40, but it can happen sooner or later depending on your visual environment and if you need vision correction, the kind and amount of your refractive error. Cellphone, Tablets, and other devices with small screens and small text have exacerbated the problem and occasionally, you even see teens wearing bifocals to be able to focus comfortably on the text on their smartphone display.

If a person has hyperopia, they often, without being aware of doing it, can correct some or all of their hyperopia by using some or all of their accommodation range to correct the problem internally. If they do this, it will cause presbyopia to seem to occur at an earlier age, because their is little or no accommodation left to enable them to focus close.

There is another phenomenon that can make presbyopia to appear to develop very fast. When you get to the point where you need external PLUS help to focus close, it relieves the ciliary muscles of some of their work load. For their size, the ciliary muscles are the strongest muscles in the body, but they are still muscles and if they are not working hard, they will rapidly become de-conditioned and loose their strength. Ultimately, it is a battle you cannot win and you will need progressively stronger reading glasses or reading segments in your glasses.

To answer your questions, the examiner did you a favor by increasing the ADD from +1.00 to +1.50. A +1.00 add is not very much and it is likely that you need a total of around +3.00 to +3.50 to focus at around 28 cm or 11 inches to focus on your cell phone.. You are still able to supply the additional +2.00 to +2.50 internally, but that will not last. It is highly likely that within a few months you would be back for more power in your reading segment and you were possibly saved a trip and possibly more expense for new glasses by going up to +1.50. However, you need to understand that you are not through needing an increased ADD. However, beyond the point where your accommodation becomes nearly 0, the amount of ADD you need is based strictly on focal distance and it is rare for that to exceed +3.50, unless you have some special problems or need to focus extremely closely.

C.


Cactus Jack 10 Feb 2014, 12:48

William,

Also, your distance prescription. That is important too.

C.


William 10 Feb 2014, 12:34

Young 38.


Cactus Jack 10 Feb 2014, 11:46

William,

May I ask your age, it is an important consideration in answering your question.

C.


William 10 Feb 2014, 10:31

Because of trouble reading my cellphone I went for an exam. After the distance part he put a card in front of me, and asked if I could see it clearly. For sure I couldn't. He then flipped lenses and asked at what point I could read the bottom line easily. When I told him, he stopped and had me read it. Then he clicked them two more times and asked if it was better, which it was. Why the additional clicks? He prescribed me +1.50 lenses for close.


Cactus Jack 06 Feb 2014, 19:57

Cork,

The last post was for you.

Also, may I ask where you live?

C


Cactus Jack 06 Feb 2014, 19:55

Generally, cataract surgery does not correct astigmatism, but sometimes it can be corrected as a different procedure that is done at the same time as the cataract surgery.

The reason is that myopia and hyperopia are generally caused by a mismatch between the total power of the eye’s lens system and the length of the eyeball. Astigmatism is caused by uneven curvature of the front surface of the cornea. Two completely different causes.

There are a number of choices these days in IOLs, including multi focal types. You can also choose your final prescription within a reasonable range. Typically, insurance programs will only pay for crystallin lens replacement with single vision IOLs and any options beyond that are paid by the patient. If she wants, she could probably keep a prescription in the -2.00 vicinity and wear glasses that were pretty close to what she wore a few years ago. If she decided on close to 20/20 correction for distance, she would almost certainly need reading glasses.

I decided to go for mono-vision where one eye is good for distance and the other for limited reading. I have some astigmatism and wear trifocals when I need to see really well (20/15). I also have some single vision reading glasses that are set for reading in bed. The mono-vision is really useful if I get up at night and don’t want to bother finding my glasses. It did not take long to get used to the mono vision because vision occurs in the brain, my brain selects the clearest image for what I am doing without my even thinking about it. I don’t have much astigmatism in the “near” eye and its Rx is about -1.50. That works quite well for the computer, without glasses. Also, the intermediate segment of the trifocals is good for the computer, but if I have a lot of work to do, I have some +1.50 clip-on magnifiers (readers) that I wear over the trifocals. They allow me to work comfortably at the computer for hours without getting a crick in my neck.

They usually wait for about 4 weeks after cataract surgery to do a refraction for glasses, so your eyes have a chance to settle down. Changes after that are usually very slight and very slow to occur. I still wear the same prescription I got 12 years ago with glasses changes only for scratches or new frames. I also have some eye muscle problems that occasionally require changes, but that has nothing to do with my basic prescription.

C


Cork 06 Feb 2014, 19:06

I know several people who had the surgery and went to mono-vision lenses. That wouldn't work with my wife. Would this correct her astigmatism? What kind of lenses would she get? In other words if she gets distance lenses I presume she would see nothing close clearly. Am I correct she would be totally dependent on readers for anything close? Would she be able to see her computer monitor? What strength of readers would she need? I also presume that the glasses she would get would be her final prescription as there is nothing left to change. Any info is appreciated.


Cactus Jack 06 Feb 2014, 18:32

Cork,

I strongly suggest that your wife's situation be investigated. These days, if cataracts are developing, there is nothing to be gained by waiting and much to be lost.

Years ago, cataract surgery was a VERY serious operation that often required weeks of recovery and the use of very strong PLUS cataract glasses. That is no longer the case in probably 99.99% of cataract surgeries. Used to the operation was so serious that they waited until the cataract was "ripe" before performing the surgery. Actually, I think they hoped the patient would die while they still had some sight left and the surgery would not be necessary. Today, except in rare cases, cataract is almost a non-event.

Modern cataract surgery typically involves a very tiny 3 mm incision in the side of the cornea, emulsification and removal of the clouded crystalline lens, and insertion of a rather small Intra Ocular Lens (IOL) in its place. In my case, about 12 years ago, the actual procedure took about 10 minutes on an outpatient basis for each eye in two procedures about 2 weeks apart.

As it happens, I drove a friend to have a cataract removed yesterday. And I waited while it was performed. The surgery was very quick, but the prep time and post surgery recovery & observation took a total of about 2 1/2 hours. I drove him home and the eye was not even bandaged. His vision after the surgery was better without glasses than it was before, with glasses. I drove him back for a post surgery evaluation this morning and his vision was 20/25 and expected to improved to 20/20 or better in the next couple of weeks. He really felt like he could have driven himself, but I insisted. He can't wait for the required 2 to 3 week interval to pass until they will do the other eye.

C.


cork 06 Feb 2014, 06:43

Very interesting. I never would have thought of that! I guess that could also explain why at her age she can see close clearly without glasses. Thanks for the great explanations.


specs4ever 05 Feb 2014, 20:11

Cork, my grandmother had a serious change in her vision and went from requiring plus glasses for reading to a prescription of -7D in a fairly short period of time. But she never did have her cataracts removed before she died. I found this on the internet.

1Nuclear Cataracts. Cataracts of the lens nucleus are most commonly associated with aging. Symptoms include:

Hazy distance vision and increasing glare.

Progressive nearsightedness and the need for frequent changes in eyeglass prescriptions. This effect may even temporarily counteract age-related farsightedness and provide a temporary improvement in overall vision in some people. The improvement fades when the cataract advances sufficiently to overwhelm the inherent farsightedness. Eventually, as the cataract grows worse, stronger glasses can no longer correct the patient's vision


Cactus Jack 05 Feb 2014, 18:53

Cork,

Cataracts affect the protein that makes up the crystalline lenses in the eye. The crystalline lenses normally have a PLUS power of about +12 to +18 diopters when fully relaxed. The ciliary muscles and crystalline lenses make up the action part of the eye's "variable focus" mechanism when you are young, before presbyopia sets in. In addition to clouding the crystalline lenses, cataracts can also cause the crystalline lens to swell and increase their PLUS power even more. If a person is nearsighted this additional PLUS will make them more nearsighted and require additional MINUS in their glasses to focus clearly at distance. If a person is farsighted and needs to wear PLUS glasses, this increased PLUS in the crystalline lenses will reduce the amount of PLUS needed in their glasses, sometimes even eliminating the need for glasses to see clearly in the distance. This phenomenon is sometimes called "Second Sight" and is a pretty good clue that cataracts are developing and will soon need fixing.

C.


Cork 05 Feb 2014, 13:23

Thanks for the response...

She said he did say something about cataract but not sure what. Why would that cause such a dramatic increase so quickly?


Cactus jack 05 Feb 2014, 08:46

Cork,

Part of the problem is how the new prescription is written with + cylinder, typically used by MDs and - cylinder used by Optometrists and Lens Makers. There is a simple conversion formula between the two. The optical results are identical for the two prescriptions.

The 2014 prescription is:

-6.75 +1.25 110

-5.25 +1.00 80

The conversion procedure is:

1. Algebraically add the cylinder to the sphere

2. Change the sign on the cylinder

3 Add or subtract 90 degrees to the axis to keep the value between 0 and 180 degrees.

The result is:

-5.50, -1.25 20

-4.25, -1.00 170

That is still a very large increase over the 2013 prescription of:

-3.75 -1.25 30

-2.00 -1.50 165

and it does not explain the incredibly rare rate of sphere increase in a 62 YO. The changes in cylinder and axis are nothing to get concerned about. They are likely caused by testing errors because of the extreme subjective nature of that part of the exam.

Have there been any indications of cataracts? They can cause significant prescription changes as a result of changes in the refractive power of the crystalline lenses.

BTW, I am not an Eye Care Professional (ECP), but an Amateur in the original French sense of one who studies vision and optics out of love of the subject. Perhaps one of our ECPs can offer an explanation or offer suggestion on items that should be investigated.

C.


Cork 05 Feb 2014, 07:59

My wife just came back from her exam. She is 62 and been nearsighted since high school. I have recent prescriptions:

These are from 3 different doctors.

12/2011

-2.50 -.50 15

-1.25 -1.00 165

add 2.25

1/2013 complaining about not clear distance vision

-3.75 -1.25 30

-2.00 -1.50 165

These gave super crisp distance.

add 2.25

2/2014 complaining about poor distance vision

-6.75 +1.25 110

-5.25 +1.00 80

add 2.50

After relatively stable vision for 50 or so years, why did

her scrip almost triple?

She can read ok without any glasses.

Anybody know why this progression? Before she went for this exam she would sometimes put her old (-2.50) glasses over her -3.75's to watch TV! I told her she is not safe driving without new glasses.


Melyssa 04 Feb 2014, 16:27

My husband has never outright picked a frame for me, because he knows that I prefer to buy a certain style of frame or a certain color at a particular time. If I am not totally sure of a frame, I ask one of the women opticians at the store to model the frame for me, so I can see how it looks because I can't see what it looks like when I try it on. That's the main problem with trying on glasses. As for my Bleudame frames, I can see what they look like, if not the exact color.


Clare 04 Feb 2014, 16:16

Soundmanpt - you make me smile because that's characteristic of so many men! I have a friend who's husband probably wouldn't fit the mould, he's great with styling and dressing women. In fact I sometimes with I could borrow him!


Soundmanpt 04 Feb 2014, 12:22

Juicebox

I totally understand the idea of having your bf go with you to help you pick out your next glasses. But if he insists that he has no problem with whatever you pick out for glasses, don't force him anyway. I have found that most guys provide very bad advice because we are often not very stylish. Maybe look at this way would you want him to pick out your shoes, handbag and other things so if the answer is no, do you really want him picking out the glasses you will be wearing? Now there are exceptions of course but if you can tell he much more interested in being anywhere but picking out clothing or glasses for you it would be best to let him have the day with his buddies. Usually if your wanting help and advice have a female friend that you like her sense of style with you for advice.

You have already said your bf has no problem with you wearing glasses so I am sure he will enjoy seeing you in whatever you choose.


Juicebox 04 Feb 2014, 05:11

hi John!

I haven't booked one yet, so thanks for reminding me! I'm super busy at the moment and really need to find the time to fit one in. I recently (after a few months of applying) was offered two part time jobs, so I'm waiting to see what my schedules are for those. Hopefully they are getting back to me today or tomorrow! Of course I'll keep you updated :)

J.


John 04 Feb 2014, 03:34

Hi Juicebox

You were told to go back in February and you thought you may need a small increase...

Have you already had your eyes checqued ?

When is the glasses shopping with your bf due ?

Keep us posted

Good luck


Likelenses 15 Jan 2014, 04:51

Ellen

I had complimented her on previous occasions on things like hair style/color, clothing,etc.

As I said,I had no idea that she wore glasses,much lees such a strong pair.And even if I had complimented her on her glasses,it would have been that she looked so beautiful in them,not because they were so strong.She was a very pretty girl with or without glasses.


Ellen 15 Jan 2014, 03:20

If I'm not sleeping in my own bed I tend to use my phone to tell the time. However the act of having to reach for it, turn it on and hold it close tends to wake me up so I prefer to just look at my clock which disturbs my drowsy state less and allows me to go back to sleep if it isn't time to get up.

Puffin, your experiment with those lenses does sound a lot like my experience especially in less than optimum light. Occasionally if I wake in the night I'll go to the bathroom without glasses. I have no idea why I sometimes do this, maybe it's just curiosity or to prove to myself that I can. The thing is I always end up feeling my way there, feeling for the door handle, feeling to check the toilet seat is down, feeling for the soap to wash my hands. It's all rather inelegant, especially when I walk into the bed or a wardrobe as you did. As you say, you can just remove the lenses and see and of course it is different for me. My safety net is knowing where my correction is at all times and knowing I can get to it easily. If this wasn't the case I would find being deprived of my vision rather frightening. I have no idea how blind people come to terms with not having this option.

Complimenting someone on their clearly strong glasses is a difficult one, particularly as this woman was obviously self conscious about them. I'm not sure how I would react, although I would think singling out the glasses would be a little odd as there are other aspects of me I would prefer to be complimented on. I think complimenting a woman's strong glasses would be something that should be saved until you know her more intimately rather than just a work acquaintance.


Likelenses 15 Jan 2014, 00:17

Ellen

I found your comment about the fear of being deprived of your glasses interesting.

A few years ago I worked in the evening for a company that employed a large amount of people.When I would take a break,I would pass by an open door office with only two women.I would often stop in to chat briefly with them. One was an older lady,and the other a very attractive younger lady.The younger lady always had a rather large glasses case on the corner of her desk,but never had glasses on,or laying any where on the desk. One evening while chatting with the young lady,I started to sit on the corner of her desk.She panicked and said "Oh, don't sit on my glasses"even though the case was pretty far away from where I was going to sit.

I didn't think much about it until a few months later,when walking past the ladies rest room,she was coming out the door, wearing the strongest minus glasses that I have ever seen. Her eyes appeared to be deep in tunnels,and she seemed to be embarrassed to have me see her in glasses.After that I realized that she must always wear contacts. I never again saw her in those marvelous glasses.Shortly later,I left the employ of that company,and have never seen her since.I wanted to tell her how beautiful she looked in glasses,but thought that since she never wore them,that she would be hurt. Do you think that I did the right thing,or do you think that she would have appreciated the compliment?


Puffin 14 Jan 2014, 09:45

I remember many years ago messing around with some plus lenses taken from old binoculars, I think they were something between plus 15 and 18 (I actually have no need of correction as yet), putting them into an empty pair of frames (they didn't fit too well) and wandered around my bedroom to see what things looked like, and actually fell over the corner of my bed because I couldn't see it. Didn't try it again quite like that.

So, I think I got a glimpse of a high-myope world - although I fully understand I could take them off and be back to normal in a moment.


And 14 Jan 2014, 09:33

Melyssa/Ellen, my gf doesn't like to have a big clock beside the bed for the very reason that she can't see it anyway !Instead she has a small portable one that she uses as an alarm and that she can just grab and bring close up to her face to read if necessay. She's happy to shower bare-eyed when she gets up but putting her contacts in is her next job.


Ellen 14 Jan 2014, 04:29

Yes it's interesting to put oneself in others' shoes. I think what people with good vision don't understand is that being myopic (or hyperopic) is our "normal". It's not like we became visually impaired overnight, we've had years or in my case my whole life to learn to deal with it. Of course, having vision as poor as mine is at times inconvenient but we develop strategies over time which we perform without really thinking about it to ensure that we are at all times able to function. I'm thinking small things like placing my glasses in exactly the same place before I go to sleep each night, working out where objects are in the shower before taking my glasses off, always having a spare pair to hand. These are things I just do without any thought and they really are no burden on my life.

Often over the years when I've tried to explain to people what my vision is like without glasses they are astonished that it could be so bad and also amazed that I am able to live a normal life. It's hard to get them to understand that it's no big deal because it's so readily correctable and because I've had decades of living like this and managing it on a day to day basis is second nature.

Fortunately I've never been deprived of my correction for any length of time and the thought of not being able to readily access glasses or lenses is something that I think about now and then. I admit that that would be a frightening thing to go through.


Slit 13 Jan 2014, 21:54

Ellen, thanks for sharing! It helps a lot for hyperopic people like us to hear how it is for Myopic people. In my case it's still a matter of not seeing super tiny print or otherwise eyes getting out of focus if staring at laptop for a long time. Especially I notice if I don't keep conscious focusing when I watch movies on on laptop it it easily goes out of focus. My trick is to use subtitles always so th eyes are active reading them.

@ellen: with high minus power of lens it's natural to have a minification. When you read small print for long time do you have trouble?

I had a a colleague who was about -10 always specifically telling me not to print spreadsheets in small small print because she she can't read.


Melyssa 13 Jan 2014, 14:34

Ellen,

I feel the same way about rain being a bane and a pain. Even a forecast of possible showers makes me bring along an umbrella, as I do not want my glasses or my hair to get wet. If the glasses get wet, I will dry them off first chance I get inside, or change glasses in the car.

On New Year’s Day I changed alarm clock radios, and the new one has humongous numbers, which I can make out even without my -9.00s if (1) a cat is not sleeping on the corner of the bed in between us, and (B) I want to see what time it is, not something to do knowing it may be close to wakeup time during the week.


Ellen 13 Jan 2014, 03:47

Thanks everyone for your replies. I'll try to answer all your questions in no particular order. First rain, don't get me started on rain! It's the babe of my life, particularly as I try not to drive too much I get caught in the rain so often. The funny thing is, even though I've had glasses all my life I still get self conscious taking them off in public to clean them. I suppose I think people must be looking at me, even though I know in reality most people haven't the slightest interest. It's also that I feel disadvantaged and maybe slightly vulnerable that they can see me and I can't see them. I have a digital clock by my bed with numbers 2 inches high. I still have to get quite close to read it but I can usually make out the time from about a foot away even though the numbers are very blurred at that distance. Showering isn't really a problem. Usually I shower in my glasses and wash below neck level and then take the specs off right at the end to wash my hair. I pretty much keep my glasses on during every waking minute otherwise. There's really no reason to take them off as I can't really see well enough to do anything without them. Last question about my corrected vision in both eyes. It's the same, 20/40, the prescription isn't too different between my eyes. If I alternatively close one eye and then the other I can discern no difference in quality of vision between them.


minus5wholuvsgwgs 13 Jan 2014, 01:46

Ellen am fascinated by your posts my gf is a high myope -15.00 and -16.25 but with only -0.25 astigmatism She has worn glasses since the age of 7 when she first started her prescription must have been quite low as she tried to do without but soon gave up the struggle For her never contacts but she avoids showers and does have problems in heavy rain her bedside clock has very large figures Her glasses always stay on even at times of intimacy which suits me but i do have to take care of them !!


Likelenses 13 Jan 2014, 00:33

Ellen

Since your right eye has a stronger prescription for both myopia and astigmatism,I am curious if your corrected vision is any worse in that eye,than it is in your left.

Both of my eyes have -10.5 correction,but I can not see as clearly with the left,as I do with the right with the glasses on.

The optometrist claims that I have 20/30 in each eye,but even the day that I pick up new glasses,the right eye is always better than the left. And when I have needed an increase in power I always can tell from my vision in the left eye.

Do you know how strong your first pair of glasses were?


guest 12 Jan 2014, 09:52

Hi Ellen

The take out the cataract by dissolving your lens and put in lens... but before the operation measurements have to be taken...and since my cataracts were very dense and very nearsighted, they did the best guess they could, erring on the low side. why the low side?? because many are uncomfortable being over corrected !! and with the -11 implants, even when I was still between -2 and -3 after the operation..I felt like my vision was perfect..since I wore glasses since 4 and probably needed them before too.

I will be on lenschat in 10 minutes, please confirm you will be there


Ellen 12 Jan 2014, 09:29

Oh sorry guest, I didn't understand your question at first. The sister in NY is my older one, she's the lucky one with the -1.5 prescription.

So you were so myopic before you had the cataracts removed that you still needed glasses for myopia? Or did they put lenses into your eyes to replace your natural ones and not quite correct you fully? Sorry if I'm being dim here.

So the difference in minification is purely down to being able to place aspheric lenses a mm or two nearer to the eye? I would have this this effect would be quite minimal?


guest again 12 Jan 2014, 08:21

Hi Ellen !

Hope you slept well. Post cataract, I was -2 but myopia progressed again.. My cataracts were very dense and the measuring equipment was not accurate. I had poor corrected vision before, so I had ignored the cataracts as just a myopic uncorrectable progression.

When you said your sis was in nyc, I thought you said you had two sister, one a -8 like your mom and the other mildly nearsighted. Am I right, or sorry if wrong. London has the best Indian food lol.

Have a good day. Do you want to go "Lenschat" at 1000 Atlanta time..believe 300 London ???

guest


Puffin 12 Jan 2014, 07:20

If you're wondering why aspheric lenses cause less minification - it's an indirect effect of having less edge thickness for higher RX.

Any lens will have it's minification or magnification effect increased the further it is held away from an object (try it with a magnifying glass). If you've got a high minus RX, you'll normally have thick edges which will either poke into your nose, or else the whole lens will have to be moved further away from your eye - causing more minification, which if you have poor acuity, will not help.

Because aspheric lenses have their refractive power differently distributed between the middle and edge (and hence relative thickness at the various points) some of that thickness can be put closer to the middle of the lens, safely away from your nose - so allowing the lens to be moved back closer to the eye, giving less eye minification and better acuity.

There really are so many options for high RX these days to help with appearance.


Likelenses 12 Jan 2014, 02:34

Ellen

Here is good info on aspheric lenses.

Click on the video also.

I think that these are exactly what you would like with large frames.

http://www.visio-rx.com/vision-topics/lenses/spherical-vs-aspheric


Ellen 11 Jan 2014, 19:29

OK I'm just about to go to sleep but before I do I just had to ask guest why you had cataract implants which still left you needing -5 glasses. I mean couldn't they be bothered to correct you better than that?

Also what did you mean by "-8 or the mild -??"?


guest :) 11 Jan 2014, 19:04

Hi Ellen...

Glad you beat the snow...

I had to go up there for a business trip last week....snow just melting, but was 0 degrees F in Pennsvlvania...

I have cataract implants -11 and still have -5 and -2 astig in glasses... so my glasses look normal! When I was in school ages ago, had to be "safety glass" so my double digits were 1/2 and more thick and needed a strap to stay on ! Now all schollkids want glasses lol ...go figure??

:)

let us know when you are coming again... which one in NY, the -8 or the mild - ??

enjoy the night


Ellen 11 Jan 2014, 15:11

OK I think I get it now. The word "aspheric" struck me as meaning "not spherical" so I was wondering what shape the lens surface is if it's not spherical. It appears it could be either a hyperbola, a parabola or an ellipse. So for a nearsighted lens the back surface would be aspheric, probably elliptical, so that it flattens out towards its edges, resulting in less edge thickness. Simple really. Now I just have to get my head round why using an aspheric surface results in less "minification".

Oh and guest, my sister lives in New York. I got out on the Wednesday just before the snows came on the Thursday. And no I haven't tried Lenschat but I might give it a go sometime.


Patrick B 11 Jan 2014, 13:05

Hi Ellen --

Crystal Veil is right: Aspheric lenses aren't a marketing blurb. They also have nothing to do with the shape of the lens itself. Physics isn't my area of expertise so I'd recommend that you google "aspheric lenses" where you will find information that is understandable to a layman. Briefly, an aspheric lens has a front surface that has been ground to enhance the quality of the viewing area of the lens so that distortion is minimized. Your lenses could well be aspheric because of your high prescription. They also minimize the look of "small eyes" with a high minus and are especially good with reducing the magnified look that plus lenses create.

CR-39 lenses are generally considered to have the best optical properties -- better than any of the high-index lenses. Again, physics isn't my thing but there are articles on-line which can explain the differences between the various lenses. I once had myodiscs in CR-39 but transitioned to high-index lenses when my prescription started to approach -20.

Hope this helps, Ellen. See if you can find a dispensing optician who is really up on high prescription lenses. Most aren't because of their relative rarity.


ds 11 Jan 2014, 12:50

Ellen,

Aspheric lenses are designed with a constantly changing curve that becomes less steep as you go towards the edge of the lens. You are correct that the myodisc is an example of an aspheric lens, but in ophthalmics, the term is usually used to describe a lens with a gradual flattening throughout the lens to optimize optics. Instead of being described by a spherical equation, they are hyperboloidal.

It turns out that this flattening gives a wider field of view as an astigmatism created by optimized curve corrects for an astigmatism present when the eye rotates and is looking off-center ("oblique astigmatism").

Most people also appreciate that the aspheric design makes the lenses thinner and minimizes tunnel or barrel distortion. It also helps looking the other direction to minimize facial distortion of the wearer.


Crystal Veil 11 Jan 2014, 09:26

Ellen,

aspheric lenses are not a marketing bulb. There are several articles about aspheric lenses on the web. In a You Tube clip it is claimed that negative aspheric lenses greatly reduce the minification of the image of the eye. A different source (article) suggests that aspheric lenses are made for Rx up to -15 and that higher prescriptions are limiting the field of view too much. It seems that the effect is not unlike that of a blended myodisc but it's different in technology and effect. It may be a good idea to ask your optician about aspheric lenses.


guest 11 Jan 2014, 09:10

Hi Ellen...

Sorry we missed you here in usa...

Where does your sister live

have you been on lenschat?? How about in 10 minutes at 120 your time 920 eastern us time

Hon, its about your safety in the car...I am not asking you to go to harrod's in them !!


Ellen 11 Jan 2014, 08:42

Ah shame, I've just come back from "over the pond" visiting my sister for New Year!

So you think CR39 gives better vision? Why is that? Even with your idea of contacts and glasses I still think I'll give it a miss. I have good enough vision to do everything I want to do, well OK I do admit I don't drive at night unless absolutely necessary but that's about it. I'm OK with my vision and what you've never had you don't miss right? Suppose I tried CR39 and was introduced to this new world of perfectly crisp, distortion free vision? What then? I'd be hooked and destined to forever wear ridiculously thick glasses. No I'll stick with what I've got or maybe look into myodiscs.

So is no one going to have a stab at explaining aspheric lenses for me? Does anyone know what it means or is it marketing blurb that doesn't really mean anything like "hypoallergenic"?


Astra 11 Jan 2014, 02:14

We myopic people can't see far away, but we can see near easily. So this should be a reason that we are in advantage to hyperopia. The reverse is true for hyperopia, where their advantage is at far, not near.


Astra 11 Jan 2014, 02:10

I think it is good to show off "seriously blind person" message to those people. Show your COKE bottles. Because our acuity without glasses is really bad we should be proud of it , proud to be "seriously blind"


Likelenses 10 Jan 2014, 23:29

Ellen

How did you guess??? Yep as many girls as possible in myodiscs would be great.

Red hair,pretty brown eyes nestled behind strong lenses,and what appears to be a great personality. Yep a trip across the Atlantic would be worth it to meet you.I would even buy you a pair of myodiscs.


guest again 10 Jan 2014, 21:02

Ellen...

Even if the others are right there is another way to solve this...

-10 or -12 regular contacts and then the remaider of rx in the cr39's !!

I understand that you don't want to announce your vision to the world....but I had a g/f who uses -10 contacts and then the remainder (just under 20, so its about -9.5 in CR39's. They are coke bottles BUT she only uses them for driving and then puts them in the glove compartment. She has hi index for when she leaves the vehicle. She claims that the combination gives her noticeably better vision-especially at night-major difference. She never felt sake night driving, now she does. I was a passenger with her at 90 mph down to interstate when she last took me to the airport and said, "not bad for being visually impaired" lol !

Ellen, its for your safety and will be better... at night in the car, your friends won't even notice how thick your glasses are!

You sound like you are worth a trip "across the pond" for lol. red hair, and amazing glasses, and a good sence of humor lol !

G


Ellen 10 Jan 2014, 16:51

That's interesting stuff Patrick. I'd never considered the possibility that myodiscs could actually give the appearance of a much weaker lens. I've always thought they shouted out "seriously blind person" to the world. I guess one of the effects is that as the corrective portion is of such a small diameter, it doesn't take such a chunk out of the cheek bones, or "cut in" as you guys refer to it. Just shows how little I know and I might explore my options at my next eye exam.

Can you or anyone explain to me what is meant by an aspheric surface? If it's not spherical, what shape is it? Surely a lens has to be made up of spherical or possibly cylindrical surfaces? I'm not sure I understand how any other shape could work.


Patrick B 10 Jan 2014, 13:51

Hi Ellen --

Yes, your combined prescription is near to mine but mine is easier to correct. I, too, notice that the high prescription makes some things too small to see even if they appear to be relatively clear. Nothing to be done except wear contacts which, because of their position on the eye itself, minimizes that problem.

Yes, my lenses are glass and their extra weight is one of the reasons why I keep my frames fairly small. I chose the 20mm bowl since it roughly frames my eyes and, with the blending into the negative carrier, nearly eliminates the appearance of the bowl itself whenever someone looks straight at me. I'm used to looking straight forward through the middle of the lenses so the small aperture doesn't bother me. You might recall that earlier lenses didn't have aspheric front surfaces so any deviation from the center of the lens made everything look like it was curved downwards in the distance. Hence, I always looked straight forward rather than deal with the visual distortions found in the other parts of the lenses. That said, I have to look straight down when I'm going down stairs since I can't see the stairs clearly enough without correction. That's where my vision limitations becomes really noticeable to others.

I like the biconcave lenses since they don't reflect all that much. Anyway, it's amazing how few people know just how strong my glasses are including a friend of mine who is at least a -12. Since I don't wear glasses all that often, he was surprised to see me in them at one point and actually asked if I needed correction all the time! Another person asked me if they were reading glasses only. Well, yes they are, of course, since I can't see to read without correction unless I want to look like some sort of scanner reading line by line with my nose pressed into the book!!

Maybe you could call an opthamologist and have him recommend an optician who is well versed in high-prescription lenses and your options. Maybe the optician would even have different sample lenses available so you could see for yourself what might work best for you practically as well as cosmetically.


Crystal Veil 10 Jan 2014, 12:44

Ellen,

you are right about the CR 39 lenses. I have a pair of medium sized Menrad glasses from the 1970's in my collection, fitted with these lenses. The Rx of the lenses is L: -14.00; cyl -2.00 and R -15.50. The lens thickness at the edge is 0,6 inch (15 millimeters) and the lenses create a strong tunnel effect, much stronger than myodisc lenses. I sometimes use these glasses during photo shoots with models who agree to pose in them. Lens thickness goes exponential beyond minus 15 so my guess is that this is the upper limit. Before the arrival of high index lenses in the 1980's, myodisc lenses were prescribed from minus 15 on, and sometimes even at minus 13. Having said that, guest is right when he says that CR 39 lenses would give you better eyesight than high index lenses but this is not a practical option for the reason mentioned above.


Ellen 10 Jan 2014, 11:46

guest,

You're kidding right? In my prescription? The lenses would be about a foot thick and my eyes would look like they were being looked at through the wrong end of a telescope. This really isn't the image I want to present to the world.

Getting technical for a second, I'm not sure if it would be possible to make a -23 lens in CR39. The radius of the back face would be so tiny that it would loop back on itself before getting to the edge of the lens, in effect making it a myodisc. OK I haven't done the maths but that's a gut feeling.

As for where I am, I'm in England, which is part of the island known as Great Britain in North West Europe.


guest 10 Jan 2014, 09:56

Hi Ellen !

Honestly, you should ALSO go for the best correction!! Which is with good ole CR39's and use a medium size frame. You will absolutely see the difference, guaranteed. However, they will be "coke bottles"-I had them and could get adequate correction. You can just keep them in the car for driving-you will notice the difference-and it will be worth it-and you will be safer on the road. Zenni can do several pairs so you have color selection at a bargain price... The local shops will try not to sell them -with a myriad of excuses to upsell to high dollar lenses for "vanity".

You sound amazing, where are you?

let me know

:)


Ellen 10 Jan 2014, 06:07

Interesting. I don't really notice the distortion of my high index lenses. I know it's there but it doesn't bother me. Are you on a mission to get as many girls wearing myodiscs as possible?

Ha ha. As for my hair colour, I'm afraid it's dyed a rather vivid red at the moment. I am however a natural brunette with brown eyes. Maybe I should get different frames to match my different hair colours.


Likelenses 09 Jan 2014, 22:34

Ellen

Here is some useful info on myodiscs.

http://www.healthboards.com/boards/eye-vision/171274-questions-about-myodisc-lenses.html


Likelenses 09 Jan 2014, 21:10

Ellen

I think that you would look great in a wayfayer type frame,with negative carrier,30 mm bowl myodiscs.

The negative carrier would make the bowl part not as obvious in lense strength.And the 30 mm bowl would fill up most of the center of the lense.

What is your hair,and eye color?


Ellen 09 Jan 2014, 17:26

Hi Patrick,

Thanks for the explanation of myodiscs. I did kind of know what they are but have never really delved into the detail. I must say that 20mm seems awfully small for what is effectively your window on the world. Does it take much adjustment to get used to looking through such a small aperture? I guess peripheral vision isn't that great? Do you find glass lenses heavy? I've had glass lenses in the past and they've ruined my nose.

Your prescription is pretty much the same as mine if I add my astigmatism. It's nice to be able to communicate with people who understand severe myopia as I don't know anyone with a prescription anywhere near mine in my daily life.


Patrick B 09 Jan 2014, 13:08

Ellen -- Myodiscs come in a variety of sizes and depend on the strength of the prescription and the preference of the patient. The size of the so-called bowl can vary from a low of 20mm to 30mm and the area surrounding the bowl (the carrier) can be a plus,a negative or a plano lens. Some people prefer the minus lens with the bowl "blended" into the negative carrier so that the lens has a unified look. So it appears that you had a myodisc lens a couple of pairs ago. My prescription is -22.50 and -23.75 and I have both 20 mm myodiscs (in 1.8 high-index glass) with a negative carrier and a more conventional pair in biconcave 1.9 high-index glass. These are a lot thicker (8mm in a 44 mm frame) than the myodiscs. The myodiscs can be really useful if you want a larger (but not too large) frame. Since I haven't got much astigmatism my vision is very good with contacts and pretty good with glasses.


Likelenses 08 Jan 2014, 23:12

Ellen

Thanks for the info on your specs. They sound very nice

Yes, it is fun to talk about our eyewear,for those of us that are bespectacled.


 08 Jan 2014, 12:44

Thank you for your help


Soundmanpt 08 Jan 2014, 11:05

posted

You only showed the smallest amount of CYL in your previous prescription and cylinder is very subjestive and can easily be missed or even not show up from one time to the next. If this doctor didn;t find a need for any astigmatism correction that would also mean you wouldn't have any axis for that eye either as they go together. Now it is very possible if you were to go for an exam in 6 months the CYL may again be detected.

Just feel confident that there wasn't a mistake of any kind and you should be able to see just fine with your new prescription.


 08 Jan 2014, 10:28

I recently got a new eye test and there was a change in my left eye. I was wondering on my new perscription why the cyl and axis columns were left blank for my left eye, when on my old perscription the were listed.

My old perscription was:

Left eye - +4.00

Cyl - +0.25

Axis - 5

Now it is:

+5.5

And that's all, the cyl and axis columns have been left blank.

Thanks


Ellen 08 Jan 2014, 05:01

Must be my eyes, I failed to notice the other part of your question. I just measured the thickness of my lenses (from a comically close distance). I'm happy to report that the outer edge of my right lens is 10 mm thick. There is however a chamfer which takes away the sharp edge, without which the lens would be a couple of mm thicker in my estimation. Hope this answers your question Likelenses. Who would have thought that talking about my ever-present mundane eyewear could be so much fun?


Ellen 08 Jan 2014, 03:23

My current frames are fairly small brown plastic ovals, very much against today's fashion. The frames I had before the ones I had before these were wider and the corrective portion of the lenses were circular and hence didn't stretch quite to the outer edges although they did at the tops and bottoms. I suppose thinking back these were what refer to as myodiscs although I didn't think of them as such at the time. To me myodiscs have a very small corrective circle in the middle of the lens completely surrounded by an area with no prescription.


Likelenses 07 Jan 2014, 19:53

Ellen

Your glasses sound really nice.

What kind of frames do you have,and how thick are the lenses?

Did you ever try myodiscs?


chich 07 Jan 2014, 19:50

Whats the lowest prescription realistically you can be dependent on?


Ellen 07 Jan 2014, 12:04

oops missed the last question. No my glasses aren't biconcave, I specifically asked for them not to be, they look weird enough already. They are flat at the front with lots of fancy coatings to get rid of reflections.


Ellen 07 Jan 2014, 08:23

I don't recall ever being able to read the 20/20 line. I can only barely make out the 20/30 line with both eyes not one eye at a time. I'm not sure why that makes a difference. In truth I can't really see the 20/30 line well but I guess I'm good at interpreting so I can make a good guess at the letters from the general indistinct shape. The 20/40 line is the first one I can truly read with any comfort.


Likelenses 07 Jan 2014, 01:41

Ellen

Oh, 0K, My misunderstanding. So then our visual acuity with glasses is the same,even though your Rx is almost double mine.

Do you recall what your Rx was when you could no longer read the 20/20 line with glasses.As I said mine began when my Rx became - 9.00,the same time as my lenses became perfectly flat on the front surfaces.

Are your lenses bioconcave?


Ellen 06 Jan 2014, 10:02

I know someone who wears hard lenses and his eyes are constantly red and sore. I don't know how he puts up with them. In fact I've never seen him in glasses and I've known him for over ten years.


Melyssa 06 Jan 2014, 08:10

Ellen,

When I was interested in contact lenses (over 30 years ago), I was told by more than one ophthalmologist that due to my astigmatism (in the "3" range) that hard lenses were the only possibility. I tried one on, and after 1.5 seconds I knew that I would be wearing glasses forever. Getting drop-temple frames the following year made wearing glasses worth it.


Ellen 06 Jan 2014, 04:24

Oh no I can get pretty much fully corrected with glasses, it's just that I can't get contacts that correct my level of astigmatism. I can't read the 20/20 line on an eye chart with glasses but on a good day I can just about read the one above (20/30?) using both eyes. I think this is more down to everything appearing smaller through my glasses than things being out of focus though.


Likelenses 06 Jan 2014, 01:08

Ellen

You said that you are unable to be fully corrected.

Your Rx is almost twice of what mine is,and you have a lot of astigmatism in each eye,

At what point of your life did you become unable to be fully corrected,and what is your best acuity with your glasses?

I have no astigmatism,but when my Rx reached -9.00 I can not see anything better than 20/30 on the eye chart The lines below the 20/30 line are clear,not smeared,but the letters are just too small to discern.

I cam not wear polycarbonate lenses,because they have optical qualities that even make my corrected vision lower than 20/30, I wear CR - 39 lenses.

I am wondering if I could have myodisc lenses made in my - 10.5 Rx.


Soundmanpt 05 Jan 2014, 12:18

Melyssa

Well you and your husband could swap glasses but for you his glasses would just be a slight bit weak for you and of course you wouldn't want to look through the bottom segment. And for him, yours would be a bit on the strong side but he could easily adjust to them after just a few minutes of wearing them. But he would miss his add when it came to reading the paper.

But even tough he fancies you in you drop temples they may not look as good on him. lol


Puffin 05 Jan 2014, 12:11

The other thing is, for a little bit of "myodisking", it can be so ground and crafted so that it looks pretty much like ordinary coke bottle rings that people would expect to see with large RX and small eyes. Okay, aesthetically it's no better, but it's probably going to be lighter.

It is possible have a compromise between somewhat larger frames, a little bit of myodisk and still look no worse.


Melyssa 05 Jan 2014, 12:04

Varifocals,

Even though my husband's RX is similar to mine, he does wear progressives, so exchanging glasses is out of the question.

He does love my fashion sense -- the drop-temples, the cat's-eyes, the short skirts, ...

Without my glasses I can see black markings (these letters) on a white background three feet away. Yes, glasses are a very big necessity in my life.


varifocals 05 Jan 2014, 11:26

Melyssa.

I did not realise yoour husband & your self have similar RXs.

That must be good.

Its great he likes your fashion sence.

How blurry areyou without glasses on.

Take care.


Melyssa 05 Jan 2014, 11:11

Ellen,

With my -9.00 RX, my eyes look quite small behind whichever glasses I'm wearing; the lenses are 1/4 to 1/2 inch thick depending on frame size; and they are almost flat as seen from the side. The big, bold and beautiful frames that I wear are what people notice and compliment me on. My husband certainly doesn't mind my "tiny eyes," as his are like that from his -8.25 glasses.


Puffin 05 Jan 2014, 09:17

I also like the "shimmery" effect of flat or near-flat front lenses, that you only get with strong lenses. It's fascinating - and very nice - to see light playing across a lens as the wearer moves their head, and the different angles of refraction in the lens.

Old fashioned lenses used to be my favourite, but I like the modern high-index ones too these days, the effect is different.

Strangely enough I did not used to like plus lenses, but the modern ones now also have a shimmery effect, thanks to the increased flatness they now have.

Of course, a nice frame and smile helps a lot.


Crystal Veil 05 Jan 2014, 08:08

Ellen,

in my opinion there are no thumb rules about lens strength and its aesthetic effect. So much depends on other features in a face, especially the lips. They are the counter point (Kontrapunkt) in the composition of the face. When the eyes look 40% smaller behind lenses of minus 20, the lips seem enlarged. A lively expression makes all the difference in the world. Over the past four years I did photo shoots with over fifty models who posed in vintage prescription glasses from my collection. Many models manage to "deliver" beautiful portraits in strong minus glasses. The photography project started with my life partner who wears glasses with lenses of minus 12. She often says that she will never go back to contact lenses. The glasses give a lively sparkle to her eyes and it's obvious that she is self confident about her glasses. At the same time she is aware that her glasses are among the strongest that you see in the streets of Holland but her liveliness and expressiveness somehow does the trick. When I first met her, I only realized that her glasses were strong when she took them off to clean the lenses. She held the glasses only a few inches from her eyes. Beauty is in the eye of the beholder.


Ellen 05 Jan 2014, 05:22

I was always under the impression that men find large eyes on women to be more attractive. That's why we wear eye make up, to enhance the eyes. You can hardly see my eyes behind my lenses, they're tiny. When I first wore contacts I was amazed how big my eyes looked without glasses as I'd never really seen them "naked" before.

I realise that perhaps guys on here aren't a representative sample of the male population as a whole but it's nice to know that there are at least a few people who find eyes behind strong negative lenses attractive.


Likelenses 04 Jan 2014, 22:05

Ellen

I love seeing women in strong glasses.

Personally I enjoy seeing the eyes,and the glasses.

Myopic eyes are usually quite prominent,and the strong lenses reduce some of that,which is alluring.

I would say you should go for the larger frame,along with the myodisc lenses.

BTW, I wear -10.5 for each eye.


Soundmanpt 04 Jan 2014, 21:39

Puffin

Totally agree!


Puffin 04 Jan 2014, 19:05

Agreed that it's difficult to hide evidence of lens strength (you can hide the thickness, but not so much the effect on eye size). Myopic eyes behind lenses look nice.


lentifan 04 Jan 2014, 11:37

Ellen

I'd be surprised if you can really tell whether someone is looking at your glasses rather than your eyes. I remember when I first started wearing glasses I, too, thought that people were looking at my glasses - even people I'd never met before. Of course it was my imagination, driven by my initial self-consciousness. I got over it quickly.

I think many myopic people who wear minus glasses with a strong prescription have very attractive eyes. The lenses of their glasses seem to give their eyes a lovely sparkle.


Ellen 04 Jan 2014, 11:30

I don't think the thickness of lenses in itself is an issue. Who cares whether a lens is 5mm or 15mm thick? It's only visible from the side anyway. The issue with the cosmetic "appeal" or otherwise of strong lenses is the overall appearance, this is what makes people sometimes look twice. It's a combination of how it makes the eyes look so much smaller, the rings that appear at the edges of myopic lenses and how they take great chunks out of your face. When someone looks at a strong pair of glasses they don't consciously take in these characteristics individually but the combined effect (the "coke bottle" effect if you will) just screams out loud and clear that the wearer has very poor eyesight.

Something I noted the other day when visiting my sister. She lives in another country to me so I don't see her and her husband very often but I always notice that when he speaks to me he seems to be looking at my glasses and not at my eyes. Maybe I'm imagining it but I don't get this feeling with other people. Maybe he has a thing for glasses but if so he married the wrong sister ;)


Puffin 04 Jan 2014, 09:58

I've seen some bold styles in the last few months, eg what could be called "big cateyes" but alas without the thick lenses.

Perhaps we need this fashion to develop a bit more: it seemed to me during the 80's (last time big frames were fashionable) people didn't seem worried about lens thickness, perhaps the boldness of the frames helped.


Ellen 03 Jan 2014, 10:27

Hi Puffin,

I do use the tricks you mention and have my lenses thinned as much as possible. I wear a plastic frame, it's just that it's quite a small style. My lenses aren't super thick really, maybe 8mm or so. The problem is really the axis of my astigmatism which means that the lenses are thicker in the left/right direction rather than at the tops and bottoms which makes getting them thinner that little bit harder.


Puffin 03 Jan 2014, 08:58

Ellen

You might find it possible to hide some unwanted thickness within plastic frames - this used to happen a lot before modern lens materials were invented, for people who were against myodiscs. A bit of skilful edge grinding and polishing can help too. If you can find a ECP who can do this sort of thing ask about options.

I've said it before many times, but fashions don't suit everyone.


Ellen 03 Jan 2014, 08:27

Hi Ellie, been away visiting my other sister over New Year so I've just seen your post. Yes I'd like to talk about our glasses "journey", it will be interesting to compare notes.

To start by answering your questions, I was first diagnosed as quite myopic as a toddler. My parents noticed that I would hold things very close and sit right next to the TV. They got concerned and whisked me off to the doctor who referred me to an eye specialist at the hospital. They were relieved when it was revealed that my problem was just plain old short sightedness but mystified where such an early onset and high level of defect came from. My mother is moderately myopic at around -8 but didn't get glasses till she was about 11. My father always had 20/20 vision until fairly recently when he gave in to full time wear of a low plus prescription. My first prescription was somewhere between -4 and -5 and I think there was a significant level of astigmatism too. My younger sister has myopia of a similar level to my mum and my older sister has very mild myopia, she only wears her glasses for driving and watching TV. No one has ever really explained why my sight ended up so poor but I suppose as it's largely fully correctable there's never been a pressing need to do a post mortem. I have regular check ups on my retinas at the hospital but fortunately my eyes have so far been healthy. As for my glasses, I wear a small frame with 1.74 index lenses. I would like to try a larger more fashionable frame but that would necessitate a lenticular style (myodisc?) lens which I think would make me feel too self conscious to wear.


Aubrac 30 Dec 2013, 11:06

Santa

Is this your girlfriends first prescription or has she worn glasses before?

As others have said, the amount of cylinder correction will greatly help and avoid eyestrain and headaches. Once she gets an increase to +1.75 she will probably prefer to go full time as distance vision will need to be improved.

Also at age 35 her power of accommodation may reduce making it less possible to see clearly for distance and close work.


JD 30 Dec 2013, 03:17

Sorry for the double post. Computer issues.


JD 30 Dec 2013, 03:15

I like to discuss glasses histories as well. I was first prescribed glasses when I was 7. Even before that I knew I wanted glasses because my dad wore them. I was also attracted to girls that wore glasses as far back as I can remember. Once I was precribed glasses, I was really excited, but too shy to wear them. I didn't actually get my first glasses until I was 11. I think the Rx was about -1.50. As my glasses got stronger every year, I started to notice lenses more; mine and other peoples'. By the time I was in my late teens I was probably only about -5 or maybe -6. I remember when I was 21 getting -7.50 lenses in CR39 and loved how thick they were, the power rings and the cut-in when I looked at myself. Becasue I liked these things so much, in fact got quite turned on by them, I've always had only CR39 lenses in all my glasses. I'm now up to -11.75 and -11.50 and LOVE how thick and strong my glasses look.


JD 30 Dec 2013, 03:15

I like to discuss glasses histories as well. I was first prescribed glasses when I was 7. Even before that I knew I wanted glasses because my dad wore them. I was also attracted to girls that wore glasses as far back as I can remember. Once I was precribed glasses, I was really excited, but too shy to wear them. I didn't actually get my first glasses until I was 11. I think the Rx was about -1.50. As my glasses got stronger every year, I started to notice lenses more; mine and other peoples'. By the time I was in my late teens I was probably only about -5 or maybe -6. I remember when I was 21 getting -7.50 lenses in CR39 and loved how thick they were, the power rings and the cut-in when I looked at myself. Becasue I liked these things so much, in fact got quite turned on by them, I've always had only CR39 lenses in all my glasses. I'm now up to -11.75 and -11.50 and LOVE how thick and strong my glasses look.


Ellie 30 Dec 2013, 02:35

Hi Ellen, I can relate to some of the troubles that you've been experiencing with needing strong lenses. I've been wearing glasses since I was 8 years old and today at age 19, my prescription is close to -15 with some astigmatism (more so in my left eye). I've been wearing contacts almost exclusively since I was 11, but lately I've been struggling to be fitted with proper contacts that give me proper vision. I'm considering RGP contacts since the astigmatism in my left eye has gotten much worse. Not many soft comtact brands have toric lenses in my high spherical prescription with astigmatism. Also, I'm nearing the upper end of the spectrum for the amount of myopic correction that I need in soft contacts.

If you're interested, I'd like to discuss our respective glasses histories.

What was your first prescription and how old were you when you got your first glasses? Do any of your family members wear glasses? Also, what kind of lenses do you have in your current glasses?

PS I apologize in advance for any typos! It's late and Im not currently wearing any correction as I fumble and type this on my iPod :P


Juicebox 26 Dec 2013, 16:24

Hi John

We haven't been yet for two reasons 1) being that I was told to go back in February and 2) after the weekend I think I may need a small increase. I don't know if you saw my post on the Sightings thread but if you didn't, I tried on my friends glasses which were probably the same as my first ones of -0.5 or so and they seemed to make things clearer. As I've said before I really don't think that I'm too in tune with my eyes because I never really notice when I need an increase! Some people on here seem to be able to tell straight away!


Ellen 26 Dec 2013, 11:16

Hi all,

Thanks for your replies. I've been staying with my sister and her family over Christmas and not been near the internet so just seen them.

So lets see. In my teens I was very self conscious of my "coke bottle" glasses and pleaded with my mother and my optician to get me into contacts. The best that could be done though was correcting the sphere (or most of it) with contacts and then using glasses for the astigmatism. This meant I had much thinner glasses which was great but I was still in glasses which wasn't. I tried going without them but the astigmatism made me dizzy and some of the sphere was still in the glasses so my sight with just the contacts was still quite poor. I often wouldn't be able to recognise people in the street and people thought I was being standoffish. Of course I still needed the glasses in class and I couldn't wear the contacts all my waking hours so I eventually gave up and reverted to the glasses/contacts combination or my full strength glasses. On the rare occasion I went on a date I would sometimes leave the glasses off and take them with me in my handbag. Once I got to university I pretty much went back to glasses and used contacts only when the glasses weren't an option. As I've got older (I'm 37 now) my eyes have got less tolerant to lenses and as I say I pretty much wear full strength glasses 24/7. I'm much more confident these days and don't feel anywhere near as self conscious in thick glasses as I did 20 years ago. There are times however when I just want to snatch the damn things off my face, throw them away and just see like "normal" people.


Soundmanpt 26 Dec 2013, 11:12

santa

Even though your girlfriend's glasses are not very strong I am surprised she doesn't wear them full time because of the amount of astigmatisms she has. Generally speaking anything more than -1.00 should cause her issues with headaches without her glasses being on. Does she ever claim to have headaches quite often?


Varifocals 26 Dec 2013, 08:59

Hi. santa.

The perscription is not very strong at all. However I am +3.25/ 5.75 & wear full time, Without them I get headaches & thats what started me in glasses in the first place. Her comfort is the main thing, strain will make matters worse, especially close work, reading etc.

David


Monty 26 Dec 2013, 07:30

Hi Ellen,

I have a similar problem to you but my lenses are not quite as strong. For many years I have worn contacts and glasses. The sphere is in the contacts and the cylinder in the glasses.The only people to see me in "full strength" are my family and then not often. When outside the home I am always in the "combo". My full strength are blended myodiscs, they look better than the ordinary lenses.

My e.mail address is monty34@live.co.uk if you would like more info.


Santa 25 Dec 2013, 23:43

My 35yr old girlfriend wears glasses part time. Today I finally saw a copy of her script R+1.25 -1.50 70 L+1.25 -1.50 110. How strong is that prescription and how often do people with that prescription wear their glasses. I'd love for her to wear them full time and I know she doesn't have contacts.


John 25 Dec 2013, 13:24

Hi Juicebox welcome back

How was your glasses shopping with your boyfriend ?

Do you think you need an increase again ?

Keep us posted


Juicebox 24 Dec 2013, 13:55

Ellen,

Hi and welcome to the site :) I'm sorry that your vision isn't the best, but I'm glad you can be mostly corrected! my prescription is tiny compared to yours but I'm so self-conscious about wearing glasses, so I hope it doesn't sound weird when I say that I'm envious about your ability to wear them all the time! If its not too personal a question, how come you don't wear contacts anymore? is it because of the better vision you get with glasses? also, again if its not too personal, how old are you? I'm 22.


30calcat 24 Dec 2013, 13:00

Ellen,

If I ever by chance come across you and do a double take, I am sorry. But do know that, at least from me, it is to take another look of admiration at someone who wears the same kind of glasses that I do. I also wear obviously strong glasses and want to feel a special connection to others that do as well.


Ellen 24 Dec 2013, 11:29

Hi,

Just happened upon this site while looking around for somewhere to talk about the trials and tribulations of life with extremely short sight. Not sure if it is exactly what I've been looking for as it seems aimed at mostly men who like women in glasses but what the heck. I've been "blind as a bat" since before I can remember. I've always wondered what it's like to be able to see without artificial aids and while I'm obviously very used to life with poor vision, my sight has caused me some anguish at various points along the way. I've never been able to be fully corrected with contacts due to high astigmatism and have at times tried various glasses/contacts combinations. At present I'm a 24/7 (apart from sleeping) glasses wearer though. Anyhow my current glasses prescription is:

right eye -19.50 sph -4.25 cyl 170

left eye -19.00 sph -3.75 cyl 160

My sight is good enough but not perfect with glasses so I'm thankful for that. I just wish my glasses didn't look so obviously strong and people weren't moved to do a double take when they see me.


Cactus jack 22 Dec 2013, 22:40

Goni,

1.5 BO in each eye is a total of 3 BO. If you did the measurements right and calibrated the paper strip right, that would mean that the test results agreed with the optometrists results.

If you get the prism in your glasses, it will be interesting to see how your prescription changes in the future,

If the glasses were cheap, it is likely that the lenses are CR-39 or possibly Polycarbonate.

C.


Goni 22 Dec 2013, 15:44

Cactus Jack,

i dont really have much of idea about the type of the lens - i do know it was cheap.

if i took your test corectly, i got around 2-3 BO PRISM.

i got my first at the 4th grade - have no idea about a prescription....

i hope i'll get my eyeglasses so i could review it..

thanks you all,


Hans 22 Dec 2013, 05:38

As a post graduate student in Mathematics and a high myope, my owl like glasses with very high minus lenses make me look intelligent!

However my professor has thick cataract glasses and the high plus lenses hide his superior intellect? I think not. Agreed he may look as though he is lost at times as he has to move his head continually to find his way around and does have problems with his tunnel-like vision.


Cactus Jack 21 Dec 2013, 09:57

Goni,

You probably DID NOT get the full amount of prism you need, but that is common for a first prescription.

BO (Base Out) prism means that your eyes are trying to turn inward toward your nose, but 1.5 BO is a very tiny amount and and up to about 10 BO is not very noticeable by other people. BO prism will make your glasses about 1 mm per prism diopter thicker at the outside edge and thinner at the inside edge.

You can minimize the edge thickness by choosing a smaller width frame or choosing Polycarbonate lenses instead of CR-39 lenses. CR-39 is the best, optically. Polycarbonate lenses are not quite as good, but have a slightly higher Index of Refraction. Higher index lenses are more expensive and are thinner, but the optical properties are NOT as good as CR-39 or Polycarbonate.

Prism correction CAN NOT be put in contact lenses. The worst side effect of needing prism is that you have to wear glasses. With your astigmatism (2nd number), glasses are likely better than contacts anyway.

You did not say how old you were when you first got glasses, but I suspect your sphere prescription (1st number) was less than it is today. The need for prism correction can also increase over time. If you do the test I mentioned, it will give you an idea of how high your prism correction will get. If you have trouble understanding how to do the test, please ask.

C.


Soundmanpt 21 Dec 2013, 09:29

faye

I will watch for you in "lenschat" and give it to you there.


Goni 21 Dec 2013, 09:20

Cactus Jack,

Thank you for your response.

If i understand you correctly - what i got may not be my fully prescription to correct my eyes problem?

What are the side effects of getting into the "world of prisms?

- Can i wear my CL made with prism?

- while i was serching more info about prisms - i found out the most of the time they have started with small amount - and it got higher and higher, thats a littlebit scary i must admit.

sorry for my poor english, right now i work as a waiter. dont know what i'm gonna study - if at all.


Cactus Jack 21 Dec 2013, 04:40

Goni,

It is common for optometrists and other ECPs (Eye Care Professionals) to under-correct prism, particularly for a first prescription with prism. 1.5 BO in each eye is really a tiny amount to see if it helps and you can tolerate it.

If you are interested, I have posted a "Simple Prism Test" on the http://www.vision-and-spex.com web site. Look on the Vision/Special Lenses for eye conditions thread, topic 'Prisms". The test is surprisingly accurate and it may give you an idea of what to expect.

Many ECPs are taught that a person can "get hooked" on prism, but I think, from personal experience, that it is more likely something similar to Latent Hyperopia. The need for prism correction is there, but the brain and eye positioning muscles have become so used to correcting the muscle imbalance or other cause, that it takes time for the eye positioning system to relax and let the glasses do the work of keeping images fused.

May I ask your occupation and if you are a student your field of interest?

You may have some more questions and it would be helpful to know how technical to get.

C.


REd 20 Dec 2013, 23:32

Faye,

This article may be helpful except for base curve

http://en.wikipedia.org/wiki/File:Lens2.png

Base curve (BC)refers to the curvature of the front of the eye glass lens. If the front is flat BC is zero. For a positive BC the higher the number the more the middle of the lens will protrude from the frame.

If your new glasses had BC = 3 then the back of the lens closest to your eye would be more curved. It is the sum of the front and back curve that must equal your new prescription to give you good vision.

And, as you have discovered, the lower the BC the more the reflection. That can be reduced by an anti reflective coating that can be applied (for a price) to your lenses.

You are at an age when you would be most sensitive to what other kids might say. 95% might notice or say nothing.

As you grow older glasses will be less an issue for both you and others. I hope no one said anything upsetting to you at school today.


Goni 20 Dec 2013, 14:11

Hello Everyone,

thats the first time i got to know there is aforum like this.

anyway, i'm 21 male from Cyprus.

today i went to the optometrist after facing some diffuclties in reading, especially in low light, also while driving i felt likemy eyes getting tired too fast.

after the eyetest the optometrist said that i have problem which my eyes dont fully work together - and he think that it will become worse and worse...

that what the presxription i got from him:

OD -3.25 -1.5 5 1.5 BO PRISM

OS -3.00 -1.75 5 1.5 BO PRISM

he told that the next appointment will be in 3 months - hopeing that no sevir change will be.

i dont excacly know my last prescription but it was around -2.75.

next week i'm gonna pick up my glasses - I'll upload a picture.

thank you all.


minus5wholuvsgwgs 20 Dec 2013, 09:22

Faye the big plus is you can see well now at your age girls (and boys ) are very self conscious you will soon realise that most people do not notice the power of your lenses Please stop worrying and thank your lucky stars that you live somewhere you can get glasses if you were in a very poor country you might not be able to get glasses and you would be very disadvantaged not being able to see well Be proud of them


faye 20 Dec 2013, 07:49

so, when i got home from school yesterday there was a message that my new glasses were ready, and after work, my mom and me went to pick them up. And i was sooo disappointed in how they look.

#1 the edges are definitely thicker

#2 a few small rings suddenly turned into lots of big ones

#3 the worst, much bigger reflections

i asked why the reflections got so big and the optician checked my new glasses and said the new ones have a #1 base curve and the old ones have a #3 base curve and that’s how they have to be. not much of a reason it seems to me. btw i don’t even know what a base curve is lol. so anyway, I’m going to wear them to school today and I wonder what the other kids are going to say.

soundman I lost your email address, could i have it again please.


Cactus Jack 19 Dec 2013, 22:29

Lucas,

Glasses are simply tools to help a person see clearly and comfortably. The purpose of the glasses and suggested wear depend on the type of vision problems they have. The reasons for suggesting one type of wear over another can be complex, but here are two simple reasons.

If a person needs correction to see distance clearly, full time wear is often suggested.

If a person has difficulty focusing close, but sees distant objects clearly, reading glasses are often prescribed to be worn when doing close work.

What prompted you to ask the question?

C.


Cactus Jack 19 Dec 2013, 22:21

astigmaphile,

Yes, I had a brief chat about 3 days ago. He seems to be doing well and has been very busy. In addition to his other talents, he is very good at diagnosing and repairing computer problems. The company he works for also sells computers and they have to be configured and checked out before delivery to the customers. Apparently, Christmas is a very busy time there and he is making good money.

He is 21 now and a very responsible young citizen. As usual, people who do not know him, cannot believe, what he can do. Even people who know him well are often amazed.

C.


Lucas 19 Dec 2013, 20:43

What difference does it make when glasses are made for full time wear or only reading?


astigmaphile 19 Dec 2013, 12:18

Cactus Jack,

Have you heard from Anderson lately. I think that his abilities in spite of vision problems are amazing.


Cactus Jack 18 Dec 2013, 19:15

I believe that if there is any connection between a persons eyeglass prescription and their intelligence, it is an incredibly weak one. There may be a myth or faulty logic involved. The Latin phrase "Post hoc, ergo procter hoc" (After this, therefore because of this) may be at work here.

It is true that highly intelligent people are quite often avid readers and are involved with lots of close work and study. This can lead to increased myopia, but not the other way around.

Both Myopia and Hyperopia are affected by genetic factors and hopefully, vision problems are detected very early in childhood and corrected if possible. Most knowledge is obtained through vision and good vision is necessary in childhood for mental development. There can also be genetic factors, environmental factors, and even disease factors involved in visual and mental development. Often, visual limitations will cause other areas of the brain to develop extraordinary capabilities.

One of our members is extremely hyperopic and and also has very high esotropia, likely caused by rubella during gestation. To compensate, he has developed incredible hearing, musical talents, and spatial memory along with incredible "photographic" memory and language skills (4 languages). As might be expected, many people assume that he is not very bright from his appearance. However they are in for a shock when they realize, he is a genius or very close to being one.

In another context, "you can't tell a book by its cover".

C.


Crystal Veil 18 Dec 2013, 18:52

Interesting theme. For many years I worked with a Psychology professor who was almost shy. His glasses were around +7 and I always felt that some of his shyness had to do with his dependence of his strong glasses since early childhood. Another example is a Dublin lady who was far from shy when we had a relation in the early 1990's. Her glasses were +8 and she told me that she had a lot of problems in childhood because of her strong glasses. Not with her classmates but with some of her teachers who always picked her out when there was disorder in the class. My impression is that strong + glasses make the wearer more vulnerable than strong minus glasses. It's easier to hide one's uncertainties behind strong minus glasses.


bill 18 Dec 2013, 18:31

Well I'm sort of smart, and I wear minus glasses. So it must be true!!

Merry Christmas to one and all.


lentifan 18 Dec 2013, 16:00

I think there may be a perception among some people that plus lenses indicate lower intelligence. Occasionally I have seen TV characters wear plus lenses when lack of intelligence appeared to be indicated - but maybe this was not what was intended.

At any rate I doubt if there is any evidence for their assumption/prejudice, and to me a strong plus lens is extremely attractive.


Melyssa 18 Dec 2013, 15:44

I remember a young woman in college who wore drop-temples and cat's-eyes in a strong minus prescription, and she had a 3.8 GPA.


astigmaphile 18 Dec 2013, 12:47

I remember a boy in high school with a high diopter plus prescription. He was super smart and nerdy. I also rememvber a girl, too. She seemed perfectly normal intellectually.


Julian 18 Dec 2013, 12:29

intelligence: I know what you mean; but I'd have to say that 'it ain't necessarily so'.


intelligence 18 Dec 2013, 04:27

@minus5wholuvsgwgs

Interesting observation of your part. I agree that strong MINUS glasses could be observed as index for high intelligence.

Although I prefer plus glasses I must also admit and want to open this for discussion that people with very strong plus glasses usually don't seem too intelligent. One could almost say that the person is either very old or mentally challenged. What to you think?

And any explanation as to why this might be?

Thanks for your input, best regards,

Intelligence


minus5wholuvsgwgs 17 Dec 2013, 11:42

Faye please do not worry it happens my own girl friend is well over double minus15 and minus 16.25 she looks great in them and most men do not worry at all Be proud of them strong glasses usually indicate high intelligence


faye 17 Dec 2013, 11:30

soundmanpt, thanks a lot. i was on lenschat and noticed your name there though i missed you. i'm going there like now. i hope you see this message and login there so we can chat.


Soundmanpt 17 Dec 2013, 11:06

faye

You seem like a smart young lady an a curious one as well. You have it right that your vision has come by way of genes and like you say most likely from your mom.

Yes as your finding out each time you need stronger glasses your lenses will be getting a little thicker as well.

When your picking the red as being better it is also the stronger of the 2 options. But I urge you to never lie about that because in the long run it will just cause you bigger problems if your glasses aren't right and it effects your vision. So always be honest about that.

One think to keep in mind. Your only 13 and already there are several ways to restore your vision back to normal, but you will have to wait until your eyes stop changing for any of them to work. And chances are between now and when you may want to consider a permanent fix there will likely be further improvements in those areas.


faye 17 Dec 2013, 09:54

to soundmanpt, so theres a snowstorm today and no school so i can answer your message. spot on, im 13. we studied some genetics so now i think i know whats up. my dad has normal glasses but my mom has these monumentally thick chunks and that’s what i inherited. a fate almost as bad as death. i have no clue what her prescription is, she must keep her forms locked up tighter than fort knox. tell me if this is true – when the dr writes a more minus prescription hes telling the optician to make me thicker lenses. so by the time im grown up my glasses will be just like hers. thanks for helping me break the secret. but i still want to know what the red and the green thing is all about.


Soundmanpt 17 Dec 2013, 09:21

faye

First of all, your not going blind. But like you heard them say you are myopic, meaning your nearsighted (shortsighted). What your going through is very normal. Just as your body is growing so are your eyes growing and when your nearsighted that means they will continue to get more nearsighted each year. I'm sure you must have noticed that before you went for your recent eye exam that your vision wasn't so good anymore even with your glasses on? By what you say I am guessing your somewhere around 13 years old, so you will be getting increases in your glasses until your somewhere in your early 20's. You did nothing to cause this and there is nothing you can do to stop it from happening. At times the increases may be much smaller and other times they may be a bit more if your have gone through a growth spurt.


faye 17 Dec 2013, 07:10

so i think my mom and my eye dr are hiding a bad secret from me by how they act when my eyes are tested, like 2 days ago. when the exam ended he said to her, lots more minus. when i asked what that meant, they were both like it’s nothing sweetie, you’ll see fine with your new glasses. also, they tried to hide my prescription form but i got a peek at the numbers he wrote down, -7.25 and -7.75 with a capital s in the next boxes. i remember last years numbers from when we ordered the glasses, -5.25 and -5.75 with the s’s. so i obviously went more minus, whatever that means. oh, one other weird thing happened at the test. when i looked through the machine, he made it half red and half green and asked me which was clearer. i couldn’t see the green side at all and the red was blurry so i told him red. he seemed to be trying different lenses and the red kept being best. so then he said like “aren’t you tired of saying red.” i said I was telling the truth. then he took the colors away and it was like, which is better 1 or 2” and he kept changing the lens. then it was the same thing with the other eye. so, what’s the big secret they don’t want me to know? is it because i’m going blind? or what else? its my eyes, im entitled to know. thanks guys. oh btw i got glasses in 2nd grade and now i’m in 8th grade. i can’t wait to hear your answers.


Murky 11 Dec 2013, 22:57

PD is really easy, I go to the photo booth on the PC, then get a pair of compasses (or protractor) and but each point in the middle of the pupil, glasses on, looking in the distance, 69 for me, 67 for close.

Can get a friend to do the same.


Cactus Jack 11 Dec 2013, 17:15

Stingray,

PD is important, but its importance increases with the prescription. Ideally, the Optical Center of the lenses is co-incident with your central axis of vision which is why there is a small difference (3-4 mm) between distance and near PD because your eyes converge for close. PD is sometime reduced or increased to cause small amounts of BO or BI prism to be induced. PD being off can cause some distortion, particularly in high prescription glasses. The location of the optical center of the lens is usually the "sweet spot" in the lens.

Normally, PD doesn't change very much in adults so if you have an older PD measurement, that should work just fine.

C.


Stingray 11 Dec 2013, 17:01

Soundmanpt: Like I asked, will being off 1,2, or 3 of the PD matter a lot?


Soundmanpt 11 Dec 2013, 16:27

Stingray

Yeah many of the optical stores have come up with the idea of not providing that because they know your intentions are to get glasses on line.

But the best way for everyone to do is whenever you are booking your eye appointment to get an eye exam, ask them at that time if they will provide you with your PD because you have glasses picked out on line. If they say "no" then tell them never mind ojn the exam either and call somewhere else. I doubt you will nee t make many calls. Actually I bet the first place will agree rather than loose your business.

Another trick is have the doctor provide you with your PD. In most cases the doctor's are independent of the store so they want your business and it matters little to them where you get your glasses.

Lastly in your case why not have a friend help you with reading the PD for you. That is the best way anyway.

I have several places setup that I send people to near me and not only do they do the eye exams at a nice discounted rate ($35.00) but also provides the PD.


Stingray 11 Dec 2013, 15:13

When ordering glasses online, just how critical is the PD measurement? If my calculations are off by say 1, 2, or 3 is that a big deal or not? My problem is that they gave me a PD ruler from Zenni, but since I can't see up close, I can't read the numbers or use the ruler with my glasses.

To get an eye care professional to reveal the PD is like near impossible. They guard it as if it were the same as atomic bomb secrets.


Cactus Jack 08 Dec 2013, 21:58

Annette,

Just wanted to add my agreement to what Soundmanpt suggested. What is causing your daughter's myopia to increase is most likely that her eyeballs are growing, which is what they normally do from childhood until early 20s, but in her case, they are growing too much and as he said, it is probably genetic. Myopia is usually caused by a mismatch between the length (size) of the eyeball and the total power of the eye's lens system. Effectively, the eyeball is growing faster than the head/eye socket and is too long. The image from distant objects is focusing in front of the retina. Minus glasses or contacts move the focus point back to the location of the retina. The distances are very small and the amount of extra growth is about 0.3 mm per diopter.

The medical term for what is happening is Progressive Myopia. It may be possible to slow the progress by wearing a weaker prescription (older glasses) while reading or using the computer, the very best thing to do is to have her seen by an ophthalmologist who specializes in Progressive Myopia for advice on how to slow the increases. Right now, Progressive Myopia is primarily an annoyance and perhaps a vanity issue, but as her sphere prescription increases beyond -10.00 the risk of retinal detachment increases, which can be very serious.

C.


Soundmanpt 08 Dec 2013, 19:51

Annette

Your eye care professional is correct. She will likely be seeing increase until she is in her early 20's. Some maybe small and others may be more do to possible growth spurts. As you may or may not know her vision came from either your genes or her dad's genes.

I am not a believer in those contacts you refer to. Their history isn't very good as they have been on and off the market a couple of times. Also from what I know about them I think they work best for those that have just a weak prescription. I know an optician that had them because she was curious how well they worked. Her prescription was on the weak side. She told me they were okay but didn't last all that long during the day when you didn't wear anything and she had to have her glasses handy rather quickly because her eyes changed really fast. Of course the best thing yto do is ask her doctor about them but my guess is he/she will be against it for her.


Annette 08 Dec 2013, 19:23

A year ago, my daughter got this prescription:

R -5.50 -1.50 65 L -6.50 -1.25 125. She was 13.

Last week, she got this prescription:

R -6.75 -1.75 70 L -8.00 -1.25 115. She is 14.

The optometrist said she got much more myopic and it wasn't surprising since she is going through puberty. The scariest thing he said was that she might have major changes for the next few years. I recall reading that there are night contact that can counteract this. Are they safe? Are they effective??


Soundmanpt 08 Dec 2013, 19:08

Clare

Your right about being confident enough to wear your glasses and even though you still do wear contacts at certain times you are showing more and more that your getting that confidence. You just have to come to terms that your every bit attractive wearing glasses as you are without them. And with each one of you life experences now when your wearing glasses your finding that people don't view you any differently than if were wearing contacts. I think it would be ironic if you were to meet the man of your dreams while wearing glasses. To be honest it really wouldn't surprise me if that were to happen.


Clare 08 Dec 2013, 16:22

Juicebox - you're right, you're lucky with that one! I've learned that once you come to terms with wearing glasses its all about confidence - if you find someone who reinforces that it must be brilliant.


John 08 Dec 2013, 06:40

Hi Juicebox,

Do you think your vision has changed since last September ?

Do you think you need an increase ?

Are you less working on a computer, which may affect your vision ?

Would you have time to do the self test ? (see my last post)

Many thanks for your answer.


John 08 Dec 2013, 06:40

Hi Juicebox,

Do you think your vision has changed since last September ?

Do you think you need an increase ?

Are you less working on a computer, which may affect your vision ?

Would you have time to do the self test ? (see my last post)

Many thanks for your answer.


Juicebox 07 Dec 2013, 08:56

Thank you Cactus Jack for that awesome explanation. I thought it would be something similar to that. I really enjoyed science at school (and was pretty good at it, I got 100% on 5/6 exams) and to be honest this kind of stuff fascinates me. What I didn't think about was how the prism effect would change between the different types of lenses, so thanks for enlightening me!


Juicebox 07 Dec 2013, 08:56

Thank you Cactus Jack for that awesome explanation. I thought it would be something similar to that. I really enjoyed science at school (and was pretty good at it, I got 100% on 5/6 exams) and to be honest this kind of stuff fascinates me. What I didn't think about was how the prism effect would change between the different types of lenses, so thanks for enlightening me!


Astra 06 Dec 2013, 00:37

It is only in general "higher the index of refraction" gives more significant chromatic aberration. There is a chart showing the abbe number V and nD (refractive index)

http://www.opticasoftware.com/documentation/Rayica/PrinciplesOfRayica/5DataHandling/HTMLFiles/index_46.gif


Cactus Jack 06 Dec 2013, 00:16

Astra and Juiicebox.

Chromatic aberration is the splitting of white light into its component colors by the prism effects of a lens. This takes a little visualization, but both concave and convex lenses are made up of an infinite number of very thin prisms arranged in a circle. It is most obvious in a concave lens for correcting myopia, the stronger the lens the more obvious the prisms. The base of the prism is located at the edge of the lens and the apex of the prism is at the center of the lens. A prism typically has straight sides and lenses have curved surfaces (prism sides) but they don't have much effect on the light splitting prism effects.

Convex lenses for hyperopia are a also a lot of ultra thin prisms arranged in a circle, but the thick bases are in the center and the sharp apexes are around the thin edge.

The splitting of the white light into colors is actually caused by the slightly different amounts of bending of the various colors as the light enters and exits the prism. The thicker the base of the prism (lens) and the higher the index of refraction, the wider the separation of the colors. Color aberration is most noticeable when looking at a relatively bright white light against a darker surface, but most of the time, the brain will simply ignore the color fringing unless it is very pronounced.

CR-39 has the best abbe value and the least color fringing of all the plastics.

C.


Astra 05 Dec 2013, 23:42

Trent,

mind you while the thickness at 180 degree is low, the nose side of my lens is about 7-8 mm thick.


Trent 05 Dec 2013, 22:43

Astra,

Interesting, my sphere is 0.75 less than yours but the same calc came back with a lens 1mm thicker. Then again my cyl is quite strong which adds to the thickness.


motard 05 Dec 2013, 21:48

Juicebox, I googled it, the effect is that the lenses tend to split colors. I didn't know what this was till now, but had experienced it with an older set of glasses with the polycarbonate lenses


juicebox 05 Dec 2013, 20:29

Astra,

I must confess that I did not further my science into A Levels and the only aberration that I know of is the astronomical kind where celestial bodies appear to be in a different location due to the angle from which they are observed. would I be right in thinking that chromatic aberration is something to do with colour? as in it somehow shifts colours or something? I could probably google this but I'm sure the answers in here would be just as good!


Astra 05 Dec 2013, 05:11

As for frame selection it's quite a hard time in that store. The store may still be too small to have easy selection for my dimension. If you have notice my PD you would easily realize not many frames are designed for PD 75-77 , most of the frame I tried on are too narrow at the temples, which seems to be unable to fit my ears.

Moreover I don't think that store has a good selection of larger frame. I haven't look at all their catalogue, though ! Perhaps I have set my target price range too low, while the store mostly offer higher priced frames. I don't want my frame+lenses combined exceeds US $ 75


Astra 05 Dec 2013, 05:02

This time the optical store does not allow me to choose the 1.50 lenses. That store has 2 branches, I have been to either one, the first one got to directly suggest me to choose between 1.56, 1.61, 1.67 , and the second one (this time) they refuse my request for 1.50 lenses. So I ended up order 1.60 lenses for convenience.


Astra 05 Dec 2013, 04:57

I suggest not to concern about lens thickness that much.

this is using my data.

http://img7.imageshack.us/img7/685/kj3n.jpg


Astra 05 Dec 2013, 04:31

john,

the most significant problem about hi-index lenses is the chromatic aberration.

As for my advice for juicebox, I suggest you to use 1.50 lenses , not hi-index lenses . hi-index lenses are thinner (that's their selling point) , but the chromatic aberration would become easy to notice, which is a disadvantage for ALL types of hi-index lenses, especially 1.67, 1.7 or 1.55-1.56. the higher the index , normally the chromatic aberration would be more severe.

but there is a type of 1.55-1.56 lenses as mentioned above, most typically found in Asia , has a poor chromatic performance with abbe value of 33-38


john 05 Dec 2013, 03:59

Juicebox

Sorry I forgot to answer.

Yes you are right in thinking they don't actually improve vision.

Also, I do'nt think tey just make the lenses look more attractive, because tinner lenses are also "antireflective" and they get rapidly dirty and have that strange purper reflective shine.


john 05 Dec 2013, 03:51

Hi Juicebox

thank you for you reply.

keep us posted in February. We keep our fingers crossed that you will not have again a big increase!

By the way do you think you need an increase ?

It would be most interesting to do a “home” or “self” eye test, so you could find out how much your eventual increase is.

I suggest the following.

Go on the http://www.eyeexamonline.com/free-eye-chart-snellen.html and left on the “print our free snellen chart” go to DOWNLOAD FREE EYE CHART.

I could not print it, but on your computer put your screen at 75%. Stay at 4 feet (1.2m) from your screen and see what line you can read with your glasses or contacts. You do it for the right eye (covering the left with your hand) and than for the left eye. If for instance you can read EDLTOZFCP with your right eye and LPCFETODZ with your left eye you may need a 0.75 increase.

Another test without your glasses and contacts. On the same page down, take the near vision card and measure for each eye at how many centimeters DZELCFOTP (the 3rd line) becomes a little blur. If it is at 25 centimeters, you may need -4 (100/25=4), if it is at 28 cm you may need-3.5 (100/28=3.57)

Thank you to keep us all posted.


motard 04 Dec 2013, 09:19

Here is mine for glasses

R -6.50 -1.75 020

L -5.25 -2.00 170


Juicebox 03 Dec 2013, 03:47

John,

Firstly I am so sorry about the late reply. I saw your post and was on a train at the time and had no internet signal to post so I made a mental note to reply, which I have only just remembered - sieve brain! So here are the answers to your questions (as well as one that I think you and Soundmanpt asked a while back that I also rudely forgot to answer - again sorry!)

I don't really feel that my glasses are strong. I do now get a few comments if people try them on that I didn't get before that they are stong, but I know from people on here that they are not nearly as strong as a lot of people's prescription so I don't really want to complain!

I think that they are getting a little thicker and if my prescription does go higher I would probably consider the thinner lenses - purely out of vanity as, am I right in thinking they don't actually improve vision? Just make the lenses look more attractive?

My optician just mentioned that most people go through these changes in their teens, but as I was a student he wasn't that concerned. He said that I am to go back in 6 months (so February now!!) and that if my eyes keep changing as rapidly he would rethink his position as I am no longer a student but a graduate with no job! I'm feverishly looking though!

It was my boyfriends birthday a while back and I decided as a little gift to him to wear my glasses for him, as you commented that your girlfriend did. He has asked before and I was open about just not feeling as attractive wearing them (to which he replied "I don't think you could ever be less beautiful" - such a good boyfriend, a keeper for sure!). As I think I have mentioned, he wears glasses too and his prescription is stronger than mine, so I felt a lot better about it. I don't wear them as often as he does around me, but now that I have put the irrational fear of him dumping me because of it to rest, I wear them occasionally. I think he actually quite likes them and offered to glasses shopping with me, that really helped to put me at ease.

Hope this answers your questions! :)


Astra 01 Dec 2013, 09:30

I have also posted some images collected by eye scene members to tieba.baidu.com


Astra 01 Dec 2013, 09:25

thank you. i am happy to know there are people that interest about the page.

that web site is

http://tieba.baidu.com/f?kw=%D1%DB%BE%B5%C4%EF

note that the language in that page is Chinese simplified , not English.

In future I hope to re-upload some of those collected images to vision-and-spex.com


Andrew 01 Dec 2013, 06:55

Thank you for the explanation. I've never been auto-refracted, so I've just learned something new.


 01 Dec 2013, 05:24

Hey Astra, what happened to your Flickr? I really miss the Chinese gwgs. What was the Chinese site you frequented?


Astra 01 Dec 2013, 00:55

If the detected astigmatism is smaller than about 0.12 , the auto-refractor may be set to give an value of 0.00 , otherwise, between 0.12 and 0.37 it likely gives 0.25


Astra 01 Dec 2013, 00:52

that machine can only detect astigmatism every 0.25 diopter


Cactus Jack 30 Nov 2013, 18:26

Andrew,

Notice that it is an auto refractor prescription. It probably prints the axis of wherever the servos that control the axis happen to rest or land. Most, but certainly not all, human beings know to ignore the axis on a 0.00 cylinder prescription. Astra is very fortunate to not have any detectable astigmatism.

C.


Andrew 30 Nov 2013, 17:10

Astra,

Why is there an axis on a zero cylindrical correction?


Astra 29 Nov 2013, 21:04

this optometrist without knowing the previous rx only gives to acuity 20/33 (0.6) after correction.

currently my acuity in the previous rx is 20/50 (0.4)


Astra 29 Nov 2013, 20:59

my previous rx was probably under-corrected by -1 or slightly more, so that this optometrist commented the increase of 3 diopters in spherical rx was very unusual in 18 months.


Astra 29 Nov 2013, 20:55

The rx is supposed to be able to correct my vision to acuity 1.0 (20/20)

Autorefractor reading

R -9.75 -0.00 177

L -9.25 -0.00 001


Astra 29 Nov 2013, 20:47

my rx update 2013.11.29

R -9.0

L -8.5


Tom 16 Nov 2013, 12:20

It is only without my glasses that i hold things close, with my glasses i can see fine an normal reading distances, i have never had any problems seeing up close. I would proberly spend 10 plus hours in front of a computer and never even get sore eyes, so i dont see how it can be that i need bifocals.

My prescription is -0.25 -0.75 10

And -0.25 -0.75 170

3 years ago it was

0.75 -0.75 10

0.50 -0.75 5. When i wear these glasses now i cant see anything clearly in the distance at all

I do get sore eyes if i try to watch tv or drive without my glasses though, especially at night which gives me massive headaches. It is fine with my glasses though and i have no problems, but i do find green lights like traffic lights and blue lights to be very very blurry. Funnily enough the same red light in the traffic light is clear and sharp ??

I live in australia


Cactus Jack 16 Nov 2013, 11:31

Tom,

If your prescription is:

Right Eye Sphere -0.25, Cylinder -0.75, Axis ??

Left Eye Sphere -0.25, Cylinder -0.75, Axis ??

That means the your Astigmatism is the dominant factor in your vision and it messes up vision at all distances and makes text harder to read. The smaller the harder. It is also possible that presbyopia is creeping up on you. The idea that you don't need reading help until 40 is a myth. You need help, when you need it. Presbyopia actually starts in childhood and usually does not become a nuisance until later, but not always. Your genes and visual environment play a big role in when you need reading help.

With your occupation, and reading preferences, don't be surprised if it is not long before you need bifocals for close or trifocals for intermediate help. If you need to see close things above your head you might find glasses with the reading segment at the top of the lens very helpful. Electricians often find those to be a godsend when they work on wall mounted electrical panels.

C.


Cactus Jack 16 Nov 2013, 11:16

Tom,

It is really hard to analyze your vision without a complete prescription that looks something like this:

OD (Right Eye) Sphere -/+ 0.00, Cylinder -/+ 0.00, Axis 0 to 180 degrees, Prism, Add

OS (Left Eye) Sphere -/+ 0.00, Cylinder -/+ 0.00, Axis 0 to 180 degrees, Prism, Add

Every element in the prescription means something.

However, if you are having reading problems, mostly with your iPad and iPhone, it is quite common even in teen agers. The problem is very tiny text and you need to hold them close so the tiny text will appear larger on your retina and make it easier to read. When you hold things close, that means your ciliary muscles and crystalline lenses have to work harder to focus really close and your eye positioning muscle have to converge your eyes more so you don't see double.

The solution may be bifocals (even for teens) that provide some PLUS help for focusing very close. You can also try some Over-the-Counter readers that are usually available in the +1.00 to +3.50 range, over your glasses. If that helps you can either ask for a bifocal prescription or Clip-On Magnifiers (clip on like sunglasses). If you like the clip on idea, I will give you a source in the US.

May I ask where you live?

C.


Tom 16 Nov 2013, 09:03

Sorry i meant to write that both eyes are -0.25 -0.75 per eye just the astigmatism angles are different.

So each eye has astigmatism and a small amount of minus.

I am a mechanic but i actually do paper work every day so i spend every day in front of the computer. With my glasses i can see when reading at a normal distance though when i sit on my iPad or phone i like to hold them close with or without glasses


Cactus Jack 16 Nov 2013, 00:51

Tom,

I suspect you either have some significant astigmatism (cylinder numbers) or possibly other problems. That I can't even guess at without more information. I have provided a bit more technical information in the post below.

C.


Cactus Jack 16 Nov 2013, 00:47

Tom,

The axis angle is not a very important number in determining quality of vision without glasses. The sphere power and cylinder power are very important.

The effects of sphere power numbers can be pretty easily calculated by dividing the power into 100 cm or 39.37 inches depending on the number system you prefer. For example, your eye that requires -0.25 should be able to see things that are closer than 400 cm (4 meters) or about 13 feet pretty clearly. The numbers for the eye that requires -0.75 are 133 cm (1.3 meters) or about 4.3 feet.

If you have astigmatism and need cylinder correction, it makes those numbers worse and affects vision at ALL distances.

What you describe is pretty normal, unless you have problems focusing close because you have presbyopia, (chances are you don't have presbyopia at 27, but it can happen at any age) or you have hyperopia. However, your sphere prescription says you have myopia.

You may like to read close out of habit or you may have enough astigmatism that you need to read close so the images of the letters cover more rods and cones in your retina and that helps you see them.

Vision actually occurs in the brain and your eyes are just biological cameras. Often people with low vision and extreme hyperopia will hold things close so the images cover more rods and cones. Think of rods and cones as being like pixels in a display or camera image sensor. The more pixels that are involved in gathering or displaying an image, the sharper it will be.

Other factors can affect reading distance preferences, but I don't have enough information to offer anything other than the above and that is pretty speculative at this point.

Another thing that is going on, because of the differences in your eyes, is that if the brain is presented with a blurry image and a clear image, it will use the clear image as its primary data source and use the other image to supplement it where it can. Ideally, when you wear your glasses your brain is presented with two clear images which it can use to build a high quality 3D image.

May I ask your occupation?

C.


Tom 15 Nov 2013, 21:01

Hey cactus that prescription is about a year old, and i think the angle is somewhere near 10 and 180 i think. I am 27 years old, but i just want to know why things are so clear really close to my face then go blurry so quickly when i move something to normal reading distance.

With my glasses on it is fine, and it has been like this ever since i was in school. Even then i used to hold books really close and sit really close to the computer


Cactus Jack 15 Nov 2013, 12:08

Tom,

It would be helpful if you would tell us your age and if we had a more recent complete prescription. You apparently have some myopia and some astigmatism. They are caused by two different things and have different effects. A small amount of myopia (corrected by minus glasses) actually helps you read without your glasses. Astigmatism affects the ability to see small things (text for instance) at all distances.

As a first step, I would suggest getting an eye exam to see what your prescription is now.

C.


Tom 15 Nov 2013, 11:29

Hi, i have a quick question. I have glasses and have had for a few years now. I wear them for distance but when i am reading i take them off.

Now i want to know, i have astigmatism and when i read without my glasses i can see fine, actually as good as with the glasses if not slightly better but only if i hold things really close to my face, like 10-15cm kinda close.

Now i have done this for ever since i can remember and i find it quite comfortable but i want to know why does writing get blurry so quickly. Like if i hold the same thing 20 or even 30 cm away i can barely read it and the further away it is impossible to read, but i can still see objects ok

My prescription is -0.25 -0.75 in both eyes so it is not like it is super strong, cna i can see things further away just not letters etc.


Julian 12 Nov 2013, 09:50

Rob - you say your glasses help a lot for reading. This has to be because of the cylinder, so I reckon it would make good sense to wear them full time.


Rob 12 Nov 2013, 09:35

Just got a new prescription:

Left: Sph -0.75 , -0.75 X 86

Right Sph -0.75, -1.00 X 90

How often do you recommend I wear them.

Before my astigmatism was just 0.25. Now I find they help a lot for reading.


Cactus Jack 07 Nov 2013, 16:08

Stingray,

The add for a computer display at 30 inches would be +1.31 or either +1.25 or +1.50. The prescription for single vision computer glasses for that distance would be:

OD: sph +2.75 cyl -1.25 axis 095

OS: sph +3.00 cyl -.25 axis 095

or perhaps

OD: sph +3.00 cyl -1.25 axis 095

OS: sph +3.25 cyl -.25 axis 095

if you need a little more plus. I would suggest trying some +1.25 or +1.50 readers over your glasses before ordering to see what works best. If you have a bit of accommodation available, the +1.25 "add" would probably a good choice.

You might find that you need to reduce your working distance by a couple of inches if you decide on the +1.50 "add"

C.


Stingray 07 Nov 2013, 15:43

Just got a new prescription:

OD: sph +1.50 cyl -1.25 axis 095 add +2.75

OS: sph +1.75 cyl -.25 axis 095 add +2.75

based on this prescription, does anyone know how to make this prescription translate into computer eyeglass prescription? My distance to my monitor is around 30 inches away from my face.


John 07 Nov 2013, 04:43

Where is Juicebox?

Long time we got any news.

I agree with Soundmanpt, it is quite a big increase, in early June 2012 you were still at -0.5 (although you needed an increase)and one year ago (last September) you just got your first “big jump” at -1.75. That is a -2 increase in one year.

Do you feel that your glasses are strong ?

Did you feel a big difference with your new prescription? Do you thing that they become a little thick? Some opticians recommend high index from -4 on.

What was the reaction of your optician? Did he ask you to come back in six months or in one year ?

Do you now wear your glasses in front of your boyfriend ?

Keep is posted


Asdoo 06 Nov 2013, 22:26

My eyes also have different image sizes bare eyed. My right eye is +1.75 and my left eye is +4.25. When I am bare eyed the images in my left eye look quite a bit smaller and blurrier. When I'm wearing glasses I don't really notice an image size difference. It's odd that there is more image size difference when I am bare eyed.


Cactus Jack 06 Nov 2013, 13:12

SC,

A minified image in your more hyperopic eye makes a lot of sense. The fact that you need a PLUS corrective lens means that the "eye power" of that eye is actually MINUS or at least more toward MINUS than the eye you are using for comparison. Remember that corrective lenses neutralize or cancel out the refractive error and vertex distance effects are square function of the lens power and the distance from the cornea.

C.


svensont 06 Nov 2013, 13:08

Danbert,

I have heard that eye doctors can prescribe more minus sphere instead of BI prism.

Wearing overcorrection has similar effect to wearing BI, so I think after your experiments your eyes got used to a new "point" when relaxed, and now, as they have relaxed more they tend to diverge even more than when looking straight ahead.


Danbert 06 Nov 2013, 12:09

svensont,

You do indeed have a good memory. I did and still do experience what I would describe as an intermittent exophoria.

I did have glasses with -1.00 sphere, axis as per my prescription and 2 BI in each eye. I wore them on and off until they broke (cheap but nasty plastic frames!).

What is interesting to me though of late is that I have been wearing an old -2.50 pair much of the time - and I find that these work very well preventing double vision. Apparently minus sphere can stimulate one's convergence - and anecdotally it is one possible treatment of low level exophoria, alongside prisms and vision therapy.

My last eye exam took a while. It seems that my eyes adjust slowly to different lenses (according to the optometrist - I guess he means that my eyes adjust to different levels of accommodation slowly) and he had to try lots of things to figure out what my prescription was. I do wonder how accurate the -0.75D spherical change (from +0.5 to -.25) is, though.


SC 06 Nov 2013, 05:21

Cactus Jack,

Your comment on image size being related to cornea-lens distance made me think. I understand if you had different prescriptions then images become different sizes.

However, I have noticed that bare-eyed the images from my eyes are not the same size. I have a substantial difference (potentially +3.5D) and notice that the most hyperopic (&lazy) eye image is around 10-15% smaller than the better eye - does this make any sense to you?

For example, the image size on my left eye becomes the same as right eye if I use a +1.25 lens at 5.5cm and leave the right eye bare.


curious 06 Nov 2013, 03:35

@Cactus Jack: thank you for your elaborate answer.

You were right. In fact, I called my ECP and she explained to me that indeed I now have a prism prescription that includes base up and base down. Of course I checked and can actually see that i.e. objects, lines, etc. are slightly elevated through my left lens and slightly moved downwards through my right lens when I keep my glasses at some distance and see through them.

Thank you and best regards,

Curious


Specs4ever 05 Nov 2013, 13:38

Pretty darned close - but oppisote Cactus. I was -2.25 in my right eye and +0.50 in my left when I first had an eye exam at 18. To pass my driver licence eye test I just squinted through my fingers - it worked then, but it wouldn't work now.


Cactus Jack 05 Nov 2013, 12:47

iamhacked,

I think S4E is right with his suggestions. The younger you are, the better chance you have, but don't expect too much.

The eyes do not necessarily track together and there are some people who have very different prescriptions in each eye. The biggest cause of discomfort is the difference in image size on each retina caused primarily by what is called Vertex Distance, which is the distance from the cornea to the back surface of the lenses in your glasses. A complicating factor may be your astigmatism, but it depends on how much you actually have. It would be very helpful if you could provide your complete prescription.

One possibility is to wear a -2.00 sphere only contact lens on your left eye and correct the remainder of the left eye's error and all the right eye's error with glasses that have nearly the same prescription. You could probably wear toric contacts for your astigmatism, but they are expensive and very hard to fit.

When I was about your age, I had about -1.50 in my left eye and 0.00 (plano) in my right eye. Effectively I had natural Mono Vision where I used my Left eye for reading and my Right eye for distance. I was not even aware that I needed glasses until I flunked an eye test for a driver's license. The result of that is that I could not play sports like baseball because I had no idea where the ball was until it was too late to hit it and my eyes don't work well together even today.

If I remember right, S$E had similar vision problems when he was growing up.

The contact idea might not work for you if you have dry eye problems.

Please let us know your complete prescription even if you have to go back to the ECP that wrote it. If they ask why, you can say that you want to carry your prescription in your wallet in case they get lost or broken and you can't easily get to them to get replacements.

May I ask where you live and do you think you might have some problems ordering glasses on line, if we give you a little help?

C.


specs4ever 05 Nov 2013, 10:44

I am not sure if there is a way to get one eye to become more nearsighted or not Iamhacked. One thing you could try might be to get a pair of glasses that has a weaker prescription for your left eye and a stronger than needed prescription for your right eye. I would tend to cut back the left eye by around -0.75D and increase the right eye by the same amount.

You need to do it so that the right eye doesn't have a really large amount of over correction to over come, and you don't want to have your left eye struggling to see clearly - which could make it even more myopic. And when you are reading it would be good to cut off the vision of the left eye with an eye patch so that your right eye is reading through the stronger than needed lens.

This will take some time and effort, but it could work. And if your right eye does develop more minus you can do the same thing all over again.


Cactus Jack 05 Nov 2013, 09:12

curious,

That is a new one, but maybe we can Interpret it.

R +1.25 -0.5 113 Prism 12.00 Base 179

L +1.00 -0.5 83 Prism 12.01 Base 358

Cylinder axis is specified in angular degrees with 0 being to the patient's left and the ECPs right. The numbers increase in a counter clockwise direction for the ECP (clockwise for the patient) until vertical at 90 degrees and on to 180 degrees. For cylinder axis there is no point in specifying angles beyond 180 degrees because the long axis of a cylinder extends from one end and out the other, 180 degrees away. However, prism is different and the Base of the prism can only be in ONE direction, anywhere in a circle.

If we apply the rules for specifying cylinder axis angle 0 (or 180) being horizontal and 90 (or 270) being vertical, it would make sense to specify Base Out prism with a little bit of Base Up in the Right Eye as 179 degrees and Base Out prism with a little Base Down in the Left Eye as 358. Usually, that situation is specified as two prism corrections for each eye such as:

R +1.25 -0.5 113 Prism 12.00 Base Out 0.25 Base Up

L +1.00 -0.5 83 Prism 12.00 Base Out 0.50 Base Down

I just grabbed those Base Up and Down numbers out of the air as examples. I was too lazy this morning to calculate the actual amount of Base Up or Down caused by 1 degree of orientation difference in one eye and 2 degrees in the other. Typically, prescriptions are written in 0.25 diopter increments or rarely 0.125 in increments. In math, these increments are called "granularity", the smaller the numbers the finer the "grain". It generally works because most people can't tell the difference between 0.25 and 0.125 in a prescription. In specifying axis angles for cylinder or prism you might need more accuracy and specifying an Up or Down component in 0.25 prism diopter increments may result in more actual prism in the glasses than the ECP wanted to prescribe.

Also, it may be that the ECP just wanted to impress everyone involved, with his skill in discerning tiny elements in a prescription. I think of such actions as the "Princess and the Pea" syndrome, from childhood stories, where the Princess was chosen my her ability to detect the presence of a small Pea under several pillows as she sat on them. It is often manifest these days by someone taking great offense and making a big deal of some tiny slight or transgression.

I wonder if the 179 and 358 actually made it into the glasses or if the lenses were just mounted at 180 degrees and 360 degrees, Base Out in both eyes.

C.


curious 05 Nov 2013, 07:07

Hi there

I have had a long history of prism prescription. As of yesterday I got new glasses. They have the following rx:

R +1.25 -0.5 113 Prism 12.00 Base 179

L +1.00 -0.5 83 Prism 12.01 Base 358

I'm just wondering how I have to read my new rx. I understand everything until we get to the base of my prism. Can anybody comment on that? I used to have a simple prescription of 12 pdpt base out in each lens. Now it seems different.

Much appreciated.

Btw: my vision is crisp and clear with my new glasses. I'm just curious what this means.


iamhacked 05 Nov 2013, 00:53

@specs4ever

hmm I'm 16 right now, and my vision has been this way since like 8 years ago.


specs4ever 03 Nov 2013, 08:23

Been there tried that iamhacked. Nothing I tried was permanant. Maybe if I could have started when my right eye first became nearsighted there might have been, but by age 18 I couldn't do a thing


iamhacked 03 Nov 2013, 04:07

My left eye is about -2.75 with my right eye being -0.75. I recently received an 0.25 dioptre increase to both eyes at my last eye exam. I also have quite a bit of astigmatism but can't remember the astigmatism prescription, probably 1 dioptre something. The thing is my eyes have been dry these few weeks due to not sleeping enough and being tired. My left eyesight seems to have deteriorated as a result of that. I don't like my eyes having such different eyesight because it gives minor headaches occasionally. Is there a way to make my two eyes' eyesight about the same, or at least make my right eye progress in myopia?


svensont 01 Nov 2013, 15:10

Danbert,

As I remember you have glasses with your real prescription and a pair with BI prism and minus sphere. Were you wearing them? If so, which one and how long? Do you still have the symptoms of double vision when tired?


Soundmanpt 27 Oct 2013, 12:14

Minus mom

It's good that her doctor doesn't seem too concerned. It means her eyes are healthy and that is the main thing. It is fairly common that when vision increases are changing at a little more rapid rate to do more frequent eye exams so that her glasses can be changed to keep up with her eye changes. There is nothing you or your husband have done or can do to prevent these changes from happening. Its just a part of there growing process and should start to slow down as they reach their early 20's.

It would seem your girls have gotten you genes for their eyes since your husband is only -3.00. At what age were you when you first got glasses and at what age were you when your eyes stopped changing? How does that compare to when your girls got their first glasses?


Minus mom 27 Oct 2013, 04:15

I'm nearsighted (-5) as is my husband (-3) so we expected nearsighted kids. We have 2 of them, girls. The older is 17 and is up to -6 -- to be expected. But I'm worried about our 15 year old. She wears -8 and is increasing too fast. Our eye dr put her on a 6 month schedule instead of 12 months. He doesn;t seem overly concerned but I am. Should I be? Thanks.


GW 26 Oct 2013, 10:31

I just got back from a tour in the middle east and they gave me this prescription and the standard black plastic frames while I was there. The frames are rather thick so its hard to tell how thick the lens are. I am having the prescription put into some frames I had before I left.

Thanks for your time responding - greatly appreciated !


Cactus Jack 26 Oct 2013, 10:00

GW,

Probably not very thick with your prescription. Actual lens thickness depends primarily on three things:

1. The prescription - your prescription is not very high and your astigmatism is the most dominant factor and the fact that your RE has + sphere and the LE minus will affect overall appearance of the glasses.

2. The lens material - I would not pay extra for high index, the benefit would be small.

3. The lens size.

A fourth factor depends on safety rules. The lens has to be thick enough to withstand a calibrated strike by a steel ball and not shatter. Usually about 3 mm thick at the center of the lens.

This prescription is well within the standard cost prescription range of Zenni Optical. Why don't you order a pair of low cost glasses from them with an acceptable frame and REALLY satisfy your curiosity without spending a lot of money.

C.


GW 25 Oct 2013, 22:27

Thanks - I was worried they would be thick !


 25 Oct 2013, 21:06

GW,

About 3 inches thick.


GW 25 Oct 2013, 17:45

Here is my glasses prescription - will they be thick ?

R Sphere Cylinder Axis

D.V. R.E +1.25 -2.00 142

L.E -1.25 -2.00 177

ADD R.E +225

L.E +255

N.V. R.E +350 -2.00 142

L.E +1.00 -2.00 177


Danbert 24 Oct 2013, 04:56

In August 2012, I had an eye exam and the result was:

R: +0.50 x -0.25 x 90

L: +0.50 x -0.50 x 90

Today (14 months later), I had an eye exam (different optometrist) and the result was:

R: -0.25 [no axis / astigmatism]

L: -0.25 x -0.25 x 95

Aside from the slight myopic shift, it seems that the astigmatism decreased by 0.25 diopters in each eye. Could this somehow be related to the myopic shift? Or are sphere and axis generally not correlated? Everything seemed to shift by a proportionate amount, so that just makes me curious.


Soundmanpt 19 Sep 2013, 19:50

John

Did your gf know she was giving you the best gift in the world? Do you think her orginal plan was to just wear them for you for your birthday and then go back to wearing her contacts but I'm sure your reaction to seeing her in glasses must have made an impression on her as much as it did on you.

So I guess you truly can say she gave you a gift "that just keeps on giving"? Did you tell her there wasn't a thing she could have bought you that would have made you anymore happy? And the truth be known she has to be much more comfortable now wearing her glasses anyway.


John 19 Sep 2013, 05:19

Juicebox

Thank you to keep us posted. I agree with Soundmanpt, it is quite a big increase, in early June 2012 you were still at -0.5 (although you needed an increase)and one year ago (last September) you just got your first “big jump” at -1.75. That is a -2 increase in one year.

Do you feel that you glasses are strong ?

Did you feel a big difference with your new prescription? Do you thing that they become a little thick? Some opticians recommend high index from -4 on.

What was the reaction of your optician? Did he ask you to come back in six months or in one year ?

My girl friend wears contacts and never wanted to wear her glasses in front of me. Last June for my birthday she wore for the first time her glasses (-4.75 and -5); the nicest present. I was so happy and now she always wear her glasses when we are together.


Clare 18 Sep 2013, 16:57

Juicebox - you've overtaken me for sure! I started with a -0.75 prescription, which I didn't wear, 20 years ago and am now at -3 and -2.75 which has been pretty stable, give or take some cyl, for a few years. Contacts are a wonderful way of masking our vision defects but if you can't wear them you soon get used to the alternative and that includes with people who, for me, who I've always hidden them from. At work I'm pretty comfortable wearing glasses but would choose to wear them every time socially (for evenings at least). Why do you choose only to wear contacts for work or socially? Before I became intolerant to contacts for long periods I'd wear them for everything and glasses were not part of my accessory wardrobe!

Like Soundmanpt says, you need to introduce your boyfriend to your glasses. Do you know his prescription? As you wear your glasses at home/shopping how come he hasn't seen you yet? Be brave, I can assure you its not as bad as you think it will be, really! I've learnt that in the last 12 months!


Soundmanpt 18 Sep 2013, 12:27

juicebox

It doesn't seem all that long ago that you got your first pair of glasses, and I think they were only -.50 as I recall. So you did have some big increases to get you where your at now. But glad to see that this increases was not very much at least. You pretty much wear your glasses and contacts like most people do and really you may even be a little bit better than some about wearing your glasses.

Is this the first prescription you have got that includes astigmatism in it? If so that would explain why it is taking you a little longer to adjust to your glasses. Like you said your contacts wouldn't have correction for your astigmatisms in them since it is such a small amount. And you really don't want your contacts to need it because then you have to wear toric lenses and they are much more expensive than normal contacts. But they will put it in your glasses. Often times even a very small amount of astigmatism correction can cause you to feel a bit like the room is spinning until your eyes adjust.

I'm surprised you would be so self conscious around your bf that you won't wear your glasses around him. Even more so since he wears glasses himself. What's your fear? You said your very comfortable with him and i'm sure he is just as comfortable around you. Just make a point the next time your going to be with him that you wear your glasses. You only have to say that your contacts are bothering you. You said he already knows you have glasses.I'm sure you will be able to see his reaction to you wearing glasses. You might even make him feel more comfortable since he wears glasses. I'm sure there will be some comments about your glasses and i bet they will all be good and sweet.


juicebox 18 Sep 2013, 09:23

John,

So sorry about getting back to you so late, I completely forgot about your post! I've got some answers for your questions if you're still interested...

- yes I wear glasses or contacts fulltime now. I wear contacts mostly for social activities and work, but when I'm at home/going shopping/anything else I wear glasses.

- It took a a few days to get used to the new prescription, only in the glasses though.

- I didn't really get ay comments from people as I still mostly wear contacts for social things. One of my closest friends at uni commented as he tried them on and said he had a similar prescription when we were working late one night and I wore them. My boyfriend still hasn't seen me wear them - I'm too vain. He knows I have them and he wears glasses too but I feel too self-conscious to wear them around him. I have no idea why though because I feel really comfortable around him.

- No headaches without the astigmatism correction and I can't really tell a difference in clarity between glasses and contacts. Though I think I am on the more un-sensitive side when it comes to noticing those kinds of things, it takes a while before I realise things are getting blurry.

My new prescription is

R: -3.75 -0.25 165

L: -3.50 -0.25 25

So it didn't go up too much :)


SPECS 14 Sep 2013, 18:05

Aubrac

Can you upload some photos of your glasses?


Aubrac 14 Sep 2013, 13:43

I have had a -5.00 scrip both eyes for many years, and have bifocal contacts with a +2.00 add.

At my last test I was told that I could get by with -4.50 and the same add. I tried this and at first missed the absolute clarity of -5.00 but over a few months have found I am fine.

I have some -4.50 glasses and these have been giving me a bit of a headache so I had them reglazed with -4.25 and 3 degree base out prism. I got them the other day and I can see perfectly and the prism seems to help with reading.

I was surprised that although the cut-in is the same, the power rings look more like a -7.00 lens. I wonder if when trying to estimate photos of lens strength even a small amount of base out prism can be misleading, also would base in prism have the same effect but from the inner part of the lens or would it look different?

CJ

Thanks for your reply and my step-daughter had a test about five years ago (age 11)and was given a +0.50 scrip but her mum never had it filled and to my knowledge has never worn glasses


Cactus Jack 09 Sep 2013, 20:51

marie,

The answer to your question about seeing better after a few days without your glasses depends on what type of myopia you have. There are actually two types of myopia. Axial or truel myopia is caused by a mismatch between the length of your eyeball and the total sphere power of your eye's lens system. Pseudo or false myopia is caused by the ciliary muscles and crystalline lenses not being fully relaxed for distance, True myopia is considered permanent because it is the result of too much growth and for it to decrease it would require that the eyeball shrink in size which is can't do. False myopia is considered "temporary", but I put it in quotes because temporary in this case can mean quite a long time. Weeks or months may be required for the effects of false myopia to gradually go away, once the stimulus is removed.

The effects of true and false myopia are the same, distant things are blurry. The correction is the same, minus corrective lenses. And both can be present in the eyes at the same time and the effects are additive.

If some of your myopia is the false type, your vision might slowly improve if you wore a weaker sphere correction, but if it is all true myopia, there would be no improvement.

Should you look forward to your next eye exam? I think most people do. Once you have experienced very sharp, clear vision it is hard not to like it. It turns out that the 20/20 (or 6/6) line on a Snellen Chart is not perfect vision. 20/20 is typical "normal" vision in a large percentage of the population. 20/15 is better and a rare few have 20/10. I think most people will tend to choose the 20/15 line if they possibly can, For most people, they are using a small amount of their accommodative power in their ciliary muscles and crystalline lenses to correct for the additional step of - power in their glasses and in effect inducing a little bit of pseudo or false myopia. Over time, you can easily increase your total myopia by more than 1 diopter of false myopia.

As you get older and presbyopia rears its head, you may find that you can no longer increase your myopia by using your accommodative power and your sphere correction will gradually decrease until it stabilizes and you need bifocals for focusing close.

Sorry to be long winded, I hope this helps.

C.


marie 09 Sep 2013, 15:31

im 26 and my last prescription is R -4.75 -0.50 110 L -4.00 -0.50 125

i wear contacts and glasses i could not leave the house without wearing them. im not ashamed i have bad eyes but if i didnt wear any glasses/contacts would i see abit better after a few days? should you look forward for your next eye exam or hate it?


John 05 Sep 2013, 04:22

Juicebox,

Thank you for your reply.

A few questions, if you have time to respond.

- Do you actually wear your glasses or contacts full time now? Are you 100%? Last February 16 you wrote “I'd say I've come around to the idea of wearing glasses a lot more than before, but I'm not 100% there yet, I still feel like I'm flawed and don't want people knowing,”

- Did you feel that -3 was a big increase? Did you got used to your new prescription right away?

- In 8 months (June 2012) you went from -0.5 to -3 (February 2013). Did you had some comments from people, who didn’t show you during those 8 months, I mean, who did show you without glasses or with -0.5 glasses before June 2012 and met you again after February 2013 with your -3 glasses ?

- You have a very slight astigmatism (-0.25 cyl.), which causes often headaches. Did you had any headaches without wearing your glasses. Your contacts don’t correct your astigmatism, do you say more clearly with your glasses ?

- It would be interesting to do before Friday a “home” or “self” eye test, so you could find out how much your increase is. I suggest the following.

Go on the” http://www.eyeexamonline.com/free-eye-chart-snellen.html” and left on the “print our free snellen chart” go to DOWNLOAD FREE EYE CHART. I could not print it, but on your compute put your screen at 75%. Stay at 4 feet (1.2m) from your screen and see what line you can read with your glasses or contacts. You do it for the right eye (covering the left with your hand) and than for the left eye. If for instance you can read EDLTOZFCP with your right eye and LPCFETODZ with your left eye you may need a 0.75 increase (you may need a-3.75 correction) and -0.5 (-3.25).

Another test without your glasses and contacts. On the same page down, take the near vision card and measure for each eye at how many centimeters DZELCFOTP (the 3rd line) becomes a little blur. If it is at 25 centimeters, you may need -4 (100/25=4), if it is at 28 cm you may need-3.5 (100/28=3.57)

Thank you to keep us all posted.


juicebox 04 Sep 2013, 16:33

hey John,

I've only just been to my house in leeds and seen the reminders to go back as I've been home all summer, it went so quick! I can tell I need an increase but I'm not sure how much. I've booked a test for Friday as I'm busy tomorrow but I'll keep you posted, for sure.


john 04 Sep 2013, 02:48

Juicebox , 05:33

last 15 Feb 2013t you went for a contact lens check up because lecture slides were beginning to look blurry again and you ended up getting a new prescription. It was

R: SPH -3.00 -0.25 165

L: SPH -2.75 -0.25 25

They said to come back in 6 months because you rx went up quite a bit.

Was your glasses prescription the same ?

How is your vision today ?

When do you plan to have an eye test, nearly 7 months have passed since february 15 ?

Keep us posted


john 04 Sep 2013, 02:43


juicebox 28 Aug 2013, 14:06

Molly,

while my prescription isn't as strong as yours, I just want to share my experience. my sister got glasses at 12 which were probably about -1 and they got a bit stronger each year until she was 19 and then they settled at -2.5 or so. I got glasses at 18 nearly 19 when I went to uni and initially they were just for seeing the lecture slides and were about -0.50. fast forward three years to now and I'm at -3 or there abouts and my optician said that they may not stabilise for some time. so I guess what I'm trying to say, like Soundmanpt, is that everyone is different! do you only wear glasses or do you have contacts? I have both :)


Soundmanpt 28 Aug 2013, 10:32

Molly

It is also possible that you just went through a bit of a growth spurt and she didn't. So just as other parts of your body makes changes so do your eyes. Your classmate may not have had much of a spurt over the past months, but ay her next eye exam it could be her turn to get a bigger increase.

But being only 16 you both are likely to see much more change in your eyes before the process slows down or stops.


REd 27 Aug 2013, 21:36

Molly,

Oooops, Cactus Jack's message overlapped with mine


REd 27 Aug 2013, 21:34

Molly,

I doubt very much that anything you did caused this increase. Perhaps Cactus Jack can give you a more cogent comment


Cactus Jack 27 Aug 2013, 21:32

Molly,

It is very unlikely that you did anything to cause your prescription to increase -1.50 in a year. It was likely caused by genetics and/or your visual environment.

The primary factor in significant myopia is genetics. Are your parents or grandparents also myopic? If so, it is likely that you have inherited your myopia and it may continue to increase for several more years until it stabilizes in your mid-twenties.

A secondary factor in progressive myopia is often your visual environment. If you are genetically disposed toward myopia, extended close work and accommodative stress can encourage myopia to increase faster than it ordinarily would. Depending on where you live and your circumstances, it might be worth a visit to a specialist in progressive myopia to see if he/she has any recommendations on ways to slow down your increasing myopia.

You do have some control over your visual environment and you can reduce accommodative stress several ways. It is very likely that you need or want to do a lot of reading and other close work as part of your school work.

1. You might find that wearing weaker glasses, for example the -6.50s, for reading may make it less stressful to focus close.

2. Try to avoid reading at very close distances. Typical reading distance is 40 cm or 16 inches. That requires +2.50 of accommodation and reading closer requires more accommodation.

3. University students with heavy reading loads often get what are called "functional bifocals" to help them switch quickly from reading the board to focusing on their notes and reduce visual fatigue.

4. Try to look up from reading at least ever 10 minutes and focus on distant objects to let your ciliary muscles and crystalline lenses relax.

5. If you use a smartphone or tablet with tiny text, very much, you might want to consider bifocals or progressives to provide a handy reading segment.

I hope this helps a little. If you have more questions, please feel free to ask. Vision, how it develops, and how it works is a fascinating field of study. May I ask what your favorite subjects are in school? Do you read much? Have you had many science courses?

C.


Molly 27 Aug 2013, 18:19

Last year at school, another classmate and I discovered that we both had almost identical prescriptions, -6.50. We just had our exams to get new glasses for going back to school. Her new prescription is -7.00 but mine is -8.00. I'm pretty upset that my glasses are going to be much stronger than hers. I'm wondering what I did that caused that to happen? I'm 16 and starting 11th grade.


F 27 Aug 2013, 08:39

Hi all,

I posted a few weeks ago about my slightly increased prescription and trying contacts for the first time. Just as an update, I've just finished the contact lens trial and I was given toric lenses to wear for the week. I found them OK, there were times when I would blink and they would move slightly, making my vision blurry momentarily, but for the most part it was fine. I don't know if I'm right in saying, but the lens itself almost felt quite thick, so I found them quite easy to put in and extremely easy to take out so I didn't have any problems on that score.

I wore them all week at work and found the clarity fantastic. To be able to see people across the office was great and I didn't have a single headache all week - almost unheard of for me! I ended up ordering a months worth of lenses and am looking forward to wearing them soon.

I asked the optician if I should get new glasses with the revised prescription and she said yes. She asked me how often I wear my current glasses. I was honest and said that I tend to wear them for distance things if I need to, cinema, train stations, that kind of thing, but felt I'd been wearing them more and more lately. She said that for someone of my prescription she would expect them to wear glasses all the time, which gave me a nice definite answer! Still didn't stop me asking a different optician the same question when I had to go back this week! This optician told me that she has a similar prescription and wouldn't be without her glasses.

So I think that's settled it for me really. I'm going to have a look a new glasses this week and will probably switch it up between lenses and glasses going forward :)


SC 22 Aug 2013, 07:55

Just had an eye test - not what I was expecting but will order glasses as my existing ones are falling apart

Old

R:+0.75 Add +1.5

L: Balance

New

R:+1.0 Add +2.0

L:Balance

The +3 to read is not a surprise but I expected it to be +1.25 Add +1.75 and I still think that is probably what it will be later. At least the intermediate will be too strong to tempt me to use for distance

My left eye is poor but not unusable. Lazy eye that can't be fully corrected and that I thought would need around +2.75 for distance but there were two surprises. 1) I was told the left eye was nearer +4.5 and 2)If I got it corrected I would be able to drive with it!!!! I wouldn't feel safe - amazing what is allowed in UK


Cactus Jack 19 Aug 2013, 12:56

canpaixano,

I saw your post on V&S and was trying to decide how to answer. Prism correction is hard to get right and there seem to be as many opinions about how to prescribe prism as there are ECPs. As I have stated on many occasions, I am not an ECP, but I have significant esophoria and have studied the situation pretty extensively.

The eye muscle control system and the focus control system are interconnected in your brain and the action of focusing on something close or using the focusing mechanism to internally correct hyperopia can cause the eye muscle control system to converge or turn your eyes inward. Normally, this is necessary to keep you from seeing double when you look at something close. If this connection is very strong, it is possible that your eyes will over converge and if there is significant hyperopia your eyes can require significant prism to fuse the two images for you.

One of the things that makes prescribing horizontal prism tricky (BO or BI), is that if your convergence response to trying to correct your hyperopia can trigger more convergence than you actually need. Because of the necessary motility (range and flexibility of motion) of the eye muscles and their control system, it is possible to induce esophoria by wearing too much horizontal prism by, in effect, programming the control system to establish a new position for distance vision with the eyes crossed rather than being pointed with the central axis of vision parallel, straight ahead.

I am going to stray a little into control system theory here an speak like an engineer. These are my own opinions and the ECPs may have a different opinion. The eye's positioning system is what control engineers would call an "Open Loop Servo System". Unlike a "Closed Loop Servo System" where the control intelligence KNOWS EXACTLY where the items being controlled are (Your ink jet printer knows exactly where the print head is so it can squirt a droplet of ink in the right place) an Open Look Servo System has to use the RESULTS it detects to position the item(s) being controlled. In the case of your eyes for horizontal motion, it tries to match up very obvious vertical lines in the two images from your eyes. Typically, the eye muscle control system is only programmed to allow simultaneous left and right movement or convergence in the horizontal direction. A person with normal motility cannot cause their eyes to diverge beyond both eyes pointing straight ahead with central axis of vision parallel. This means that if you are seeing double, the control system can only fuse the images for you if the images are pretty closely matched up and the the motion necessary to fuse the images is some convergence. Often, if the problem is esophoria or esotropia the reason the images are not fused is because the eyes are already converged too much. If this is the situation, trying to fuse the images will cause the eyes to converge more and separate the images further. The secret is to try to let your eyes relax and not try to fuse the images. It takes some practice and if you are lucky and you do not have too much uncorrected esophoria your medial rectus (inside) eye muscles will relax and the images will fuse.

In some cases, because of possible over or under convergence problems, a different amounts of prism may be required to fuse close images and distant images. I suspect your ECP wants to check how much prism you need for close focusing AFTER the minimum amount of prism you need for distance has been determined. Don't be surprised if you are asked to sit for several hours without your glasses or to not try to read while you are waiting. The idea there is similar to dilating the eyes to fully relax the ciliary muscles.

Vertical prism is often needed if the eyes are not well coordinated in the vertical direction. There are 6 muscles in 3 pairs for each eye and few humans have the ability to move their eyes individually in the vertical directions or oblique directions. However, muscle imbalance can cause the eyes to point in individual directions vertically. The way vertical prism is often prescribed for glasses is to split the prism between the two eyes with one being specified as Base Up and the other as Base Down.

Sorry to be so long winded. Yours was an example of two simple questions that required very complex answers that took about an hour to write. Prism and how the eye's control systems work are not easy to understand. To some extent, unlike determining your sphere and cylinder correction, determining your exact prism needs involves some experimentation. Often "Press-On" Fresnel prisms are used to let you try different prism prescriptions before making the final glasses. For adults, "Press-On" prisms are only used on one eye because they often introduce so much optical distortion that you cannot read with that eye and you need the other eye without the Fresnel lens to function.

C.


canpaixano 19 Aug 2013, 10:36

Hi all

So far I have only posted about my vision problems on vision&spex, therefore my entire story can be read there.

But since I have an eye-exam tomorrow and nobody answered me there I dare to post the exact same topic here@eyescene. I hope you can forgive me for posting identical content twice.

First of all, as you might remember, I currently have 20 pdpt base out in each lense, glasses for hyperopia and an add of +1.5 in my glasses.

A few days back I went to my annual exam and had a new ecp, the old one had apparently left the company, so I was rather critical regarding the new one.

Well, it turns out that there's been some changes. After carefully measuring and examining my eyes he came to the conclusion that I had in fact too many prisms in my current glasses.

He said that I would in fact only need the 24 prisms (12 in each lens) according to the result of the exam. He then asked me if I felt comfortable seeing through the trial frame which I did indeed.

It is not that surprising since I had felt some discomfort over the last few months but I had rather thought that this had to do with a need for higher prisms. Well, sometimes you're in for a surprise.

Additionally to the fact that I was now back to the amount of prisms I had had a few years back he announced that I now also had a few prisms base up in my right eye. Not that this was enough news, he also said that due to my age he did not think too much of my add and thought that I should still be able to accommodate accordingly. I'm not sure about that. But I'll have another exam next week where he wants to double check the amount of prisms he has detected a few days back. He also said that then he would take on measuring the amount of prisms I need up-close. He said that he is of the opinion than before giving an add he would rather prescribe more prisms for close-work. Does that make sense? I mean: when I'm reading I already turn my eyes inwards a bit naturally, everybody does. So how come I need a higher amount of prisms for up close? I don't quiet understand.

Also, can anybody comment on my newly measured base-up prism? I'm not very familiar with prisms base up or down and can't seem to find anything online. There is vast information about esophoria, exophoria and such, but can somebody help me out here?

Best,

J.


Andrew 08 Aug 2013, 01:08

Yogi,

It makes him a bit of both, but the preference for using minus cylinder in the Rx means that the Sphere correction appears as a plus. I'm sure someone else will convert the Rx you gave into plus cylinder.

My wife has a similar Rx, although the numbers are a little higher. However, in her case, the axis is about 180 degrees. The effect of this is that her face enlarges to the side, as you would expect from someone who is long-sighted, but there are power rings at the top and the bottom of the lens.


yogi 07 Aug 2013, 16:54

Quick question

my sister and her husband were over from Canada last week and my other sister and her husband and kids came over for the weekend. late Sunday after the kids were in bed and after we had seriously depleted my drinks supply we some how ended up talking about glasses

six adults all wearing glasses after the inevitable trying on each others glasses usually followed by how do you see through those or hell your eyes are worse than mine

the conclusion was four short-sighted two long-sighted

five with progressives four with astigmatism only one with prism (I won because I had them all)

now for the question my Canadian brother in law fairly new to wearing glasses only had them a few years he got them after getting headaches when doing close work ( he is 48) he was told he was long-sighted and to use them for reading/close work and for driving but he chose to go full time as he felt he could see better with them at all distances

he had his prescription in his wallet R sph +0.75 cyl -1.50 L sph +1.00 cyl -1.50 cant remember the axis

as his astigmatism is in the minus and is more then his plus sph correction ( nearly double)

doesn’t that make him short-sighted

his glasses have the appearance of weak minus glasses slight cut in very mild power rings but with mild distortion like weak plus glasses


F 07 Aug 2013, 10:38

Thank you both Cactus Jack and Soundmanpt for your replies. The detailed description of cylinder was very interesting to read.

I can drive, but I don't currently have a car (which hinders the process slightly!) I actually first found out I needed glasses when I started driving lessons when I was 18 or so. I'm 25 now so I have been wearing glasses for a few years.

The optician said she would order in contacts for me, so I'm waiting for them to call. I think I will give them a try and see how I get on. My current glasses aren't that old, but I think I will get a new pair with the new prescription and see what difference it makes!

Thank you again for taking the time to reply - it's much appreciated!


Cactus jack 07 Aug 2013, 09:54

F,

The decision to wear glasses is still yours, unless driving is involved. Vision actually occurs in the brain and the brain has amazing image processing capabilities to make really blurry images from your biological cameras (eyes) seem clear. The only snag is that the brain must know what something looks like to generate a clear image from a blurry one.

Perhaps it would be helpful to explore what your prescription means in practical terms. The first number in your prescription is called the Sphere correction. The -2.25 is only a little more than the -1.75 and that number is only affects your distance vision. You are nearsighted or have myopia and it is like a person with 20/20 or 6/6 vision wearing +2.25 reading glasses all the time. This in turn means that you can read effortlessly at less than 17.5 inches or 44.5 cm, but everything beyond that distance is increasingly blurry. By the way, when you were not wearing your -1.75 glasses, your world started getting blurry at 22.5 inches or 57 cm.

That is not all that bad, but you also have some astigmatism as indicated by the second and third numbers. The second number is called the Cylinder correction and the third is the (long) Axis of the cylinder. The two always go together to specify the amount of Cylinder correction and the direction of the long axis of the cylinder. By convention, 0 or 180 degrees is Horizontal and the numbers increase counter-clockwise (looking at the patient) thru 90 degrees (vertical) to 180. Numbers above 180 are not used. The problem with astigmatism is that it messes up vision at ALL distances and it particularly messes up the ability to read text comfortably. What happens with astigmatism is that your eyes focus at different distances depending on the orientation of the elements of a letter. For example, the vertical line of an "E" might be in focus at one distance while the horizontal lines would be blurry and If you moved the text to where the horizontal lines of the "E" were in focus, the vertical line would be blurry. You have no ability to correct that problem without external help, but your brain tries anyway which leads to fatigue.

One thing you need to expect if you start wearing your glasses full time, which you should, will be that after a few days, you will think your vision has been made worse by your glasses. Not true. What has happened is that your brain no longer has to work extra hard to produce "clear" vision for you, the glasses are doing that extra work for you. You can force your brain to go back to processing the blurry images, but you should expect complaints in the form of headaches and stress.

If you would really prefer not to wear glasses, you may be able to wear a compromise (sphere only) contact lens prescription, but probably toric contact lenses would be better. The problem with torics are that they are expensive and hard to fit so that they remain correctly oriented on your cornea as you blink, but they may be worth a try.

C.


Soundmanpt 07 Aug 2013, 09:30

F

How often and when you choose to wear your glasses is totally up to you, except when your driving. Driving would be much to unsafe without your glasses and I very pretty sure you don't even consider driving without them anymore.

Because of you astigmatisms your actual vision when put together is about -2.75 which is very close to -3.00. Even your previous prescription was at or slightly over -2.00 when you consider your astigmatisms.

My opinion is that I think most would be wearing their glasses full time now.


F 07 Aug 2013, 02:27

Hi all,

I unexpectedly went for an eye test yesterday. I originally only popped into the opticians to enquire about a contact lense trial. I assumed that my old prescription would be fine to use, but they decided to retest my eyes.

My old prescription from about May last year was - R: -1.75, cyl: -0.50, axis: 95; L: -1.75, cyl: -0.75, axis: 70.

The new one reads - R: -2.25, cyl: -0.75, axis: 100; L: -2.25, cyl: -1.00, axis: 75.

I was a bit surprised that my prescription has gone up as I find my vision with my glasses to be really quite good. I don't currently wear my glasses full time, but I have found that I have had to wear them increasingly lately and I've had a bit of eyestrain. I was looking into contacts for social events etc. I know this is a bit subjective and down to the wearer really, but do you think a prescription of this nature warrants full time wear? I know it's not a massive increase, but I think as I'm now in the -2 range, rather than the -1 it feels like it to me!


Soundmanpt 05 Aug 2013, 18:51

Millie

I am sorry I was wrong. But as you can see for yourself base on your past history your eyes have changed already by the same amount that it has taken you a full year to change in the past. So I would have to think in the next 4 or 5 months your eyes will change even more.


Karynnina 05 Aug 2013, 17:07

My newest prescription:

O.D. -4.50 -2.00 175

O.S. -5.00 -2.50 170

ADD: +2.50

Last time both eyes hade the same diopters, -4.75. Now the left eye is weaker and the right eye is stronger. Go figure. They still total -9.50, so I'm sort of consistent. :)

Karynnina


Millie 03 Aug 2013, 20:02

Hi Soundman,

Today, I was walking past an optical shop and on the spur of the moment, I decided to walk in. The optometrist wasn't doing anything, so 5 minutes later I was in his room reading the chart and within 30 minutes I had a new prescription. It's good I did because the new prescription is much stronger. RE -9.25 LE -9.50. As you can see, it is close to combining my friend's glasses and my old ones.


Soundmanpt 02 Aug 2013, 10:28

Millie

Just as I thought, your eyes have been changing each year at about the same rate of about -1.00 with each new prescription. So your two thirds of the way to getting your next exam so it is very reasonable to assume that your eyes already would be in need of around -.75 increase if you were to get an exam today. So now just as I said that only leaves a difference of another -.75 for your eyes to make up, which your eyes actually enjoy the over correction.

By the way how is you friend doing with getting used to her first glasses? I'm sure your a good role model for her. Is she still on the shy side about wearing them in front of people or is she over that?


Millie 01 Aug 2013, 18:47

Soundman,

Thanks for your explanation. I scrounged around and found my last few prescriptions:

age 17 RE -8.00 LE -8.25

age 16 RE -6.75 LE -7.25

age 15 RE -6.00 LE -6.25

age 14 RE -4.75 LE -5.00


Puffin 27 Jul 2013, 15:39

Millie

it's fairly unlikely that the exact difference between your glasses and what you need is supplied by your friend's glasses.

More likely they are quite a bit more than necessary, it's just that for slight myopia (ie, the difference between your "Christmas glasses" and what you now need) any extra correction makes little or no difference for distance, and close up the strength of your young accommodative eye muscles can cope with the subtraction of focusing strength easily enough - thus everything looks clear.

Maybe you could find some other friends who have glasses in the range -.5 to -1 then you could try to pin down the difference. Or if things are getting too fuzzy for practical stuff like reading the blackboard, watching TV, then go to an optician, and know for sure.


Soundmanpt 27 Jul 2013, 12:31

Millie

Most likely it is a combination of both. It is going on 8 months since you got your current glasses and at your age your eyes are likely still changing at a pretty steady rate. Do you recall how much of an increase you got when you got your glasses? I assume before that it was also a year between eye exams? So if you were to get your eyes examined now you would likely need an increase of maybe -.50. So now when you tried on your friends glasses over yours the actual difference from what your eyes really need and her glasses is around -1.00. There are many that prefer being over corrected because like you they can see better. So being able to see so clearly with her glases over your own is understandable and no you probably don't need -9.50 yet, but more like -8.50.


slit 27 Jul 2013, 12:00

Hi Tom,

This may sound quite against the norm, but one great thing to do is starting with a progressive bifocal from now on. It will help fast getting used to and also reduce the pressure of "getting bifocals the very next day after turning 40".

In my case as almost 30 yr old I'm considering full time progressive especially with smart phone usage which account to about 70% of my time on internet.


Millie 27 Jul 2013, 11:16

I'm a 17 year old girl with nearsighted eyes. My glasses are -8.00 and my prescription is from last Christmas. One of my girlfriends just got her first pair of glasses and her prescription is -1.50. When I tried her glasses on I couldn't see anything, but when I put them on over my own glasses, I was shocked because everything suddenly looked so much sharper than through just my own glasses. Does that mean that I need -9.50 glasses? I didn't think that my eyes could have changed so much in that short of a time.


Soundmanpt 25 Jul 2013, 17:54

Tom

Most likely her distance vision should not continue to change much from now on. I would assume that depending on how much close work she does each day maybe the reason she needs the increase. And really when you really consider that it has been 4 years her eyes didn't change all that much, only about -.25 each year. now being 37 she is getting in that area where she may be starting to need reading glasses more and more.

Really I am not sure why her doctor didn't just go ahead and prescribe her with a weak add for bifocals this time.

You didn't say if she has already got her glasses or not, but I think she will find that they will be much more useful for her now. Unlike with her previous glasses she now needs to wear them anytime she is driving as it is no longer an option. Not sure where you live but if you live where you have to take a vision test to renew your driver's license she will fail it without her glasses and she will be restricted to wear them when driving from now on. Other than that it is her option how much she chooses to wear them but i think she will decide on her own that she needs them much more now.


Tom 25 Jul 2013, 17:06

My wife started with a -1.00 prescription in both eyes 4 yrs ago, then 33 yrs old, after complaining more often that she couldn't see really well when driving. She only put on her glasses for driving at night, or when having to drive when feeling very tired.

Now, 4 yrs later, after having experiencied her having increasing difficulties to see really well also when having her glasses on (which does not happen a lot), I managed to convince her to have her eyes tested again for the first time in 4 yrs. She was shocked by her new prescription, now -2.00 right and -2.25 left with some cilinder also. She never thought her eyes would get worse in her late thirties. Also, the ophtalmologist advises her to start using very mild reading glasses (+0.75) for long periods of close work as her near vision was obviously also below average.

She wonders what is happening to her eyes, and whether both her far and near vision will further deteriorate?


SC 22 Jul 2013, 05:42

Hong Kong and Singapore seem to have lots of people with no lenses let alone no prescription. Some frames look suspiciously like the 3D ones you get at cinemas


Melyssa 20 Jul 2013, 11:19

Come to the Philadelphia area if you want to see women wearing glasses because we have to, not just to wear them without a real prescription. And others still wear small, metal, rimless, or dark plastic frames, leaving the big, bold, and beautiful frames to me.


Carrie 20 Jul 2013, 11:09

It's because so many women are wearing glasses with no prescription that people think mine are also non-prescription!


Soundmanpt 20 Jul 2013, 10:35

Clare

You need to try and think of your glasses as a piece of your jewelery, much like a necklace or ear rings and not like a medical tool to help you see. The fact that they help give you good vision is just an added benefit. That is why so many, mainly women, are wearing glasses without any prescription. It's because they are that popular now and considered as a fashion item.


Clare 20 Jul 2013, 06:12

irish_guy - I must remember that as I never feel particularly cool when I wear mine!


irish_guy 09 Jul 2013, 16:33

Thanks Clare. I don't need them for work as my near vision for computer is good, but am beginning to wear them a quite a bit in the evening and weekends. It is a bit weird (and exciting!) having my friends getting used to them. Plus it is great having everything in HD. And I like them -- all the cool kids are wearing them these days!! :)


Emmie 03 Jul 2013, 13:32

Soundmanpt -

I got the AR Coating! They advised me to get it and as I work infront of four monitors, it made sense!

I do wear them through the day. My first few days, I was taking them on and off, but this is easier (especially now I've adjusted).

I like 'em. And, they help! So... All good really.

Thank you for the explanations. It's quite a strange thing to come to - glasses are so common, yet when you've never worn them, you have no idea!


Clare 02 Jul 2013, 15:25

Irish guy - you definitely start seeing the benefit at around that prescription. I only wore them for driving and TV/movies when I had the same but my friend wore them all the time so its pretty much up to you and how much you feel they improve your vision.


Soundmanpt 02 Jul 2013, 14:20

Emmie

Glad to hear everything is now going good for you. So what they did is to just combine things for you and it makes good sense to do it that way. So your glasses are basicly a reading prescription with some astigmatism as well. The +.50 is mainly fro doing your computer and other close work but your eyes should adjust them for seeing distance as well. The -.50 is your astigmatisms and astigmatisms effect your vision at all distances so they should be of help with seeing distance as well as seeing close up. Being your first glasses you were going through and adjusting period in a couple of ways. First because of the +.50 part they were great for doing the close things but probably a little bit blurry when you were looking in the distance. That takes wearing them full time to overcome so your eyes adjust and focus. Then there's the astigmatisms, that is likely why you were feeling nausea and probably the room was spinning at first as well? The adjusting period to your glasses should be about 2 weeks of full time wear, but if you were doing a lot of putting on and taking off then it can be much longer. You should be as comfortable wearing them for distance as you are for your close work. I hope you got the AR coating (anti-reflective) added to them as that will even make them better for driving both day and night.


Emmie 02 Jul 2013, 11:23

Soundmanpt -

Thank you for your reply. My eyes have adjusted, but it took a while. I actually went back and had my eyes/glasses checked at the same place, by a different optician as I was so unsure about the prescription. I was told that they are single vision glasses which were made with the add being included straight into the glasses lens, effectively making them:

+.50 / -.50 / 25

+.50 / -.50 / 180

The optician suggested I drive home using the glasses to help with the adjustment issues I was having taking the glasses off at the end of the day, especially since my astigmatism has never been corrected.

The optician also told me he felt that one of my problems with adjustment came down to one of my frame choices and my getting used to a narrower field of vision... (One of my frames is sort of medium wide and rectangle, and the other is smaller and more oval - the smaller pair took much longer to adjust to).

To be honest, my glasses are helping me greatly. While only a small correction, the glasses make my vision much clearer and now that the nausea has gone I find it easier and better wearing them. I even bought an old-fashion eye glasses chain which makes me look a little 1970s and I kind of love that!

In any case, I was grateful to find this forum and get answers to what I felt were rather trivial questions - but as a new wearer, these questions were important me... This forum is great, so thank you, again, for your response.

Em.


Cactus jack 18 Jun 2013, 17:05

curiousbf,

That is not a very large increase. It appears that some of her previous cylinder correction has been added to the sphere correction, but that could just be because of the extreme subjective nature of the astigmatism part of an eye exam. The sphere increase is probably in the typical range for someone with a genetic tendency toward myopia.

Actually, it seems like the strongest tendency toward myopia is inherited from the mother rather than the father so it is possible that her prescription will not get as high as her fathers, but it is impossible to predict.

Also, with a prescription below about -4.50 there is almost no difference between the glasses prescription and the contact lens prescription. However, if there is significant cylinder, to minimize the many difficulties with toric contact lenses (with cylinder correction) compromises and adjustments are sometimes made in the sphere and cylinder of toric contacts. It is best to always consider the glasses prescription as being the most accurate if there is a difference between the two. Glasses are easily made to the exact prescription, whereas torics are only available to the nearest 5 degrees of axis and sometimes adjustments are made to keep the toric contacts properly aligned on the cornea.

C.


curiousbf 18 Jun 2013, 14:26

My girlfriend recently got her eyes checked, both she and I knew that her eyes had gotten worse but I was shocked at how fast that they did. (She gets her eyes checked every 6 months)

Anyways her old prescription (contacts):

L: -1.5 -1.75 180

R: -1.5 -1.75 180

New Prescription (contacts again)

L: -3 -1.25 180

R: -2.5 -1.25 180

I really love her new glasses though!

A couple of questions:

1. She is 20, how much worse could her eyes get?

2. What would her glasses prescription be?

I know that her Dad was around a -9 prescription if that helps, thanks for the help!


Soundmanpt 18 Jun 2013, 11:16

emmie

I happened to see something that you added after Cactus Jack responded to you. You said something about your glasses being "single lens" Not sure what that exactly means? Are you saying that they put your full prescription into one lens type as opposed to giving you 2 different pairs of glasses? Or do you mean that you only got "single vision" lenses which would mean that they didn't bother with the add at all? If you got progressives which would have everything in it then you should notice that looking through the bottom of your lenses makes things a bit larger for you. But if everything looks the same size through all parts of your glasses then they are single vision without any add.

It has been about a week since your last post so has your eyes adjusted to your glasses by now? They soon if not already should start to feel comfortable the more you get used to them. Like Cactus Jack said your prescription is weak but still enough to make a difference in how well you can see. And since they really should help your vision at all distances you may find there is no reason to take them off.


REd 18 Jun 2013, 10:38

Rita,

Yes your nearsightedness did increase. Did you get your new glasses yet? Then you should see much more clearly. How many years have you had your old prescription?


irish_guy 18 Jun 2013, 09:56

My last eyetest was a couple of years ago and my prescription was -0.5, but I didn't bother getting glasses. I hand another test today and optician said I definitely need glasses now - prescription has gone to -1.25. I'm 27 now. Anyone have a similar prescription? How often do you wear them... I'm quite shocked at the difference wearing them...


Eyestein 16 Jun 2013, 08:39

Yes. That's a big increase. You are very nearsighted


Rita 16 Jun 2013, 07:48

I'm 17 years old.

My old perscription is (R) -6.75 -0.75 75 (L) -7.50 -1.00 105

I just got a new perscription. It is (R) -8.00 -1.00 85 (L) -9.00 -1.25 95.

Does that mean I got more nearsighted?


Daniel1 10 Jun 2013, 06:30

CJ, look in your mail.

Tnx,


Emmie 10 Jun 2013, 05:40

One more question (sorry!!), my glasses are "single lens" prescription. I just wanted to check that everything you've written, Cactus Jack, still applies?

Thank you. :)


Emmie 10 Jun 2013, 03:54

Thank you so much Cactus Jack. I didn't know the impact of the "Add" in the prescription, and if it would "hurt" my eyes to use them when talking to a workmate as such. I really (VERY MUCH), appreciate your clear and patient answer about my prescription. Your explanation is really straight forward for me and I have a much better understanding thanks to your response.

I'm glad I found the forum.

Thank you! Emmie.


Cactus Jack 09 Jun 2013, 21:10

Daniel1,

Please contact me privately at cactusjack1928@hotmail.com

C.


Daniel1 09 Jun 2013, 20:02

CJ,

Hi, I'd like to hear your opinion,

Thanks,


Cactus Jack 09 Jun 2013, 18:50

Hi Emmie,

Welcome. Yes, it is a very low prescription, but the primary benefit is the 2nd and 3rd number in the prescription which are the cylinder and axis to correct mild astigmatism.

The 1st number, called the sphere correction helps you focus just a tiny bit as does the Add, but I suspect you probably would not notice if they were not there because the internal auto-focus mechanism can likely still easily deal with that small amount of focusing effort.

As I said previously, the cylinder and axis that correct your astigmatism do something that your eyes cannot do for themselves. Your Astigmatism is caused by a very small amount of uneven curvature of the front surface of the cornea. The problem with astigmatism is that it affects clarity at all distances and it causes text to be fatiguing to read. The effect of the astigmatism on text is that lines that run in different directions will focus differently. For example, depending on the axis (3rd number), the vertical lines of an "H" might be sharp and the horizontal line will be blurry without correction. Your brain, where vision actually occurs, does not understand that it can't fix the problem by using your auto-focus mechanism, but it tries anyway. The result is more fatigue than is necessary.

In the long run, the small sphere and add will not make any particular difference, but the cylinder and axis will probably be very helpful. As you get older, the sphere might increase a little, but it is very likely that the add will. That increase is caused by what is called presbyopia. That is where your auto-focus mechanism gradually looses its ability to focus and you will need a stronger add to focus close.

As far as taking your glasses off to chat with a colleague, it is not necessary and tends to make glasses more noticeable. You would be better off just to leave them on at work if you want to and take them off if you go out for lunch or go home. It is strictly up to you. However, you might find them useful for reading menus at lunch.

It is not unusual to feel a little nauseous when you first start wearing glasses, particularly if there is cylinder correction. It is caused by your brain not having to try to correct the slightly distorted images caused by your astigmatism. That will go away in a few days. The more you wear your glasses, the quicker that will happen.

Hope this helps.

C.


Emmie 09 Jun 2013, 16:38

Hi there.

I have just recently got reading glasses due to the prolonged time I spend in front of multiple screens at work. I am 34.

My Rx is:

+.25 / -.50 / 25

+.25 / -.50 / 180

Add: .25

I know this is a very light prescription - but with the glasses (which are new) I have noticed an improvement at work and much less strain.

I wanted to ask a few things though from people with more experience than myself. I know the Add is very small - but how will I effect my eyes, if I look at a work colleague wearing my glasses? I know I shouldn't wear them for every day use and just stick to reading and my computer work... so am just wondering what kind of effect it will have on my sight, if I don't remove them every time someone comes in to ask me a question?

Also - is it normal to feel slightly nauseous for the first week or so that I have them? As I said - they are new. This is my first time with glasses and I don't have anyone to ask this type of question to. Thank you. x.


Daniel1 09 Jun 2013, 08:50

Svensont,

Hi, this is my real pres, before I ordered the glasses I went to do a new eye test - there was some increase in the cyl.

I just came back from the mirror and I see I  a liitle bit cross eyed - almost not noticeable - I didnt notice that before, interesting.

Tnx !


svensont 09 Jun 2013, 08:27

Good to hear from you Daniel1!

Do your eyes appear slightly crossed when looking in the mirror?

I can see that you sphere and astigmatism prescription is different than you mentioned in earlier post, is that your real prescription, or you changed something in it (except the prism, ofc)?

I think if you continue wearing the prism glasses you will become cross eyed and the eye doctor will detect that.


Daniel1 09 Jun 2013, 07:54

 Hi guys, 

I׳m Daniel the one who wants to add some prisms to his glasses in order to make them thicker, 

After 1.5 month wearing full time this pres:

-3.5 -1.5 180 with 8 prisms BO

-3.25 -1.75 180 with 8 prisms BO

My vision have never been that clearer! , it got me 2 days to get used to the new glasses - but from then I wear them full time (reading/driving/distance) I'm so amazed by the thickness ! I can't believe it's my glasses and actually I get very nice comments - almost every friend of mine realized that I got much higher pres.

It's really the most sharpest image I've ever seen.

one more thing, I started to see double vision for couple of minutes in the evening when I took off my glasses - but when i put them on again it's gone like never been before.

So I want to go optometrist for eye test, is there a possibly I will have to get some real prisms? 

Anyway my next jump in prescription will be in 3 months, I want to order -4.5 glasses with 12prisms. 

I can't wait that!

See ya!


Clare 09 Jun 2013, 04:10

Hi Hollie - I suppose its surprising how quickly things become the norm, I haven't had any comments at work for months now. I suppose I am still a little self-conscious but nothing like I was, I assume that people now just accept that I sometimes wear glasses. I never wear them in to the office as I'd have to take them out mid afternoon so they see me everyday wearing glasses and on some days I just don't switch. The only comments I've had recently have been from friends who never saw me wear glasses, I probably haven't got through them all, or the family, so there will be more to come I'm sure! How is it going with you - are you more comfortable now wearing glasses sometimes instead of contacts?

On the air con, I've overheard other colleagues complaining how sore their eyes feel. Given what I now know about how contacts absorb the moisture we produce from tears I'm not surprised that people with contacts suffer more. The only thing that surprises me is that some people wear contacts and have no ill affects whatsoever, I wonder what their secret is! There's no doubt I'd rather be able to wear contacts all the time again but its no longer such a huge issue for me. There's someone I'm interested in though, he's seen me wearing glasses once, on the first occasion we met, but not since. I'm still not confident enough though to abandon the contacts when I know I'll see him!!


Hollie 05 Jun 2013, 02:04

How is it going wearing glasses more often clare? I agree with the comments on contacts - mine were so uncomfortable yesterday with the aircon being higher in the heat. Going to go with glasses in the office today!


Clare 02 Jun 2013, 23:56

sarah - I've had the same. It may be that your eyes/cornea have become sensitised if you've worn contacts for many years. I wear contacts less now than I used to but, at the end of a day in the office, I generally feel its nice to take them out and I find my eyes feel alot better. Might be worth trying some eye drops during the day to keep them comfortable.


sarah 25 May 2013, 13:44

i use to be able to go without wearing glasses but now is not possable. my optician says my eyes -5.25 are not that bad but there is no way i could be with out glasses/contacts im blind without them. i was nervous to wear my glasses out but i had not to care and just wore them. all ways get comments and jokes when people see you wearing glasses for the first time. people with perfect vision dont understand.


Cactus Jack 21 May 2013, 23:55

TheBrit,

Could you please provide your complete prescription and where you had the glasses made.

C.


Dodger 21 May 2013, 21:38

Hey everybody, I've been a very infrequent poster but a long time lurker and follower of this website. I just had my eyes checked and was given the following RX, my first progrssive RX, OD +.050 -1.00 165 add +1.25 OS +.050 -1.25 155 add +1.25. I was a little skepticle at first but I'm AMAZED at how much the letters and words pop when I'm reading.


TheBrit 21 May 2013, 04:20

Hi CJ,

Thanks for your posting on the 22nd April. I have now have my new glasses which have gone to 10 base out prism..WOW !!

My vision has never been so clear or precise as it is with these new glasses. The double vision I was experiencing when tired with the 5 base out prism has totally gone. It took no more than a few hours to get used to them. As recommended by someone on EYESCENE, I chose 1.50 index freeform lenses.

These lenses give me good all round vision even when I look to the side...they are really great.I cannot understand why some people are reluctant to start using prism as they are amazing, & give considerable eye comfort. I have gone from no prism to 5 to 10 base out in a rather short period of 6 months. Where I will be in a years time we will see?

My frames are best described ad metal semi rimless where the lense is open on the outside edge near the temple & where the lense is at its thickest...6/7mm. In fact the frame/ lense combination looks really good As it highlights the lense shape as well.

I am more than satisfied with these new glasses.. & await what the future has in store at my next control?


Soundmanpt 17 May 2013, 20:04

sarah

Contact lenses in most cases don't allow enough oxygen to get to your eyes. I think most people if their being honest will tell you that their eyes feel better and are more comfortable when they are wearing their glasses or nothing at all. It's good that you do take your contacts off and wear your glasses in the evening and on weekends, but everyone is a little different and your eyes may require even more time away from contacts and others can seem to never remove their contacts and never have any problems.

You might have a chat with your eye doctor about maybe changing you to contacts that allow more air to reach the eye.


sarah 17 May 2013, 13:47

ive been wearing contact lenses about 4 years full time glasses at night and days off. my contacts are -5.25 is bad so i must wear glasses. the last week i wore glasses full time and my eyes feel beter. why is this?


Cactus jack 22 Apr 2013, 10:55

TheBrit,

There are several factors that are involved in lens edge thickness. Your prescription, Index of Refraction, Lens Width, and the amount and orientation of the prism. Another factor can be, in the case of BO prism, how thick the inside edge needs to be to safely support the lens in the frame.

There is a formula for pretty accurately estimating lens thickness, but I I have found approximately 1 mm per prism diopter to be pretty close. If you can compare the edge thickness difference in edge thickness between glasses with no prism and the glasses with 5 BO it will give you and idea of what the thickness of 10 BO would be.

The snag with the calculation or estimation of the edge thickness for plus lenses is the size of the blank used for making the lenses. Plus lenses are thick in the center and very thin at the edges. If a relatively small final size lens is made using a large plus blank, the small lens will be cut from the center of the blank, leaving edges thick and the center thicker. If a small size lens is make using a small blank, the edges after cutting to fit the frame will be much thinner. Prism complicates everything because the blank has to be thick enough to start with to accommodate the substantially increased edge thickness caused by the prism.

I don't think I have been much help with your question, but there are too many variables that you have little or no control over to be able to make an accurate prediction. You first step is to find a source what will make glasses with 10-12 BO. I have not checked lately, but I think Zenni may not go much above 5 BO. I have not checked in a long time, but at one time Optical 4 Less would go up to 11 BO.

C.


TheBrit 22 Apr 2013, 09:14

Thanks for the info CJ !! Could you tell me how much thickness 10 Base out prism will ADD to my lense outside edge please. I will use 1.5 CR39 lenses as it appears to be best with the addition of prisms. Look forward to your advice..........


Cactus Jack 18 Apr 2013, 22:58

TheBrit,

You can probably easily wear 10 to 12 BO in each eye. That is about the same convergence as reading at about 40 cm. The problem will be getting glasses made with that much prism. Hopefully, whoever makes the glasses will know to adjust the distance PD inward about 0.27 mm per prism diopter using Prentice's rule for prism glasses. The important thing is that the PD not be moved inward twice. Once by you and once by the glasses maker.

Good luck and let us know the results. Remember, you can get to really like wearing prism in your glasses.

FYI, i am in the process of writing a story about prism glasses called "The Strabismus Institute". It is posted on Vision and Specs under Fantasy Stories about vision/glasses. Just remember that it is fiction and may not be technically accurate.

C.


TheBrit 18 Apr 2013, 04:12

Earlier this year I was prescribed additional to my prescription 5 base out prism. I have adapted to them with no trouble whatsoever,& my vision is really great.

However on this website many people desire & want thicker lenses. I never really took much notice until I got my prism glasses, but now I understand all these people!!

I think I have got this "Addiction" now & find myself wanting my glasses thicker,certainly on the outside edge.

With CR39 lenses my outer lense thickness is +/- 4/4.5 mm, would like to get them to 6 to 7 mm..can I do this by increasing the prism, & would I be able to cope with the increase? Maybe someone could give me the advice I need?


Karene 17 Apr 2013, 22:50

Post my prescription. Okay.

Right -8.00 -1.75 110

Left -8.50 -.75 82

I wear them 24/7 and I'm about to get a new pair. I prefer a wider lens, like a 59, or a 60. I've actually got a pair from the 1990's that are 62's and I just relensed them in my current prescription


Andrew 16 Apr 2013, 14:40

Isabella,

At the age of 16. it's probably quite normal, and if you were not referred to a specialist, it's probably nothing to worry about. A certain amount of myopia can be hereditary, so if you have other members of your family who are also very short-sighted, you are probably just proving you are a member of the family! One other little factor you have not mentioned is how old the previous prescription is, which might help to determine whether your -1.25 increase is a big one, or a long-overdue one.


Melyssa 16 Apr 2013, 09:58

Isabella,

For highly-nearsighted people such as ourselves, this is normal, although not necessarily such a big jump at one time. I started out at -1.75/-1.50 at age 8, and gradually went up to -9.00 in both eyes by 36. Most myopes' vision stabilizes in one's mid-20s or thereabouts, but I was an exception there.


isabella 16 Apr 2013, 08:33

how bad is it when you have an eye test and you get higher numbers on your form? every time i have an exam i get higher numbers. for instance my old form said (r) -6.75 (l) -6.25 and the new one says (r) -8.00 (l) -7.50. is that normal or terrible? oh btw i'm 16. thanks.


Bob 13 Apr 2013, 22:00

- glasses


Specs4Me 13 Apr 2013, 21:41

Bob,

As I understand it there are a couple of possibilities here. First, if the glasses are "Plus" power then you had some latent hyperopia which your ciliery muscles, the muscles that control your inner lens focusing actions, have relaxed and you are now noticing what is your actual visual acuity. Second, if the glasses are "Minus" power, you probably were not seeing things as clearly as you thought you were and the glasses have corrected that for you, your brain has now accustomed itself to the sharp image and when the glasses are not there recognizes the blurryness.

There are some on this board that can explain it more acurately and clearly but I think you are experiencing one of these two situations.

Enjoy your glasses and the clear vision they provide!


Bob 13 Apr 2013, 21:22

Surprised that things looked clearer with glasses. Colleague told me they weak! Have worn them for over 2 weeks and now lots look blurry without them! Is this a sign that I need glasses fulltime or is this a transition getting used to wearing glasses? Should I wear them all the time now or less?


svensont 08 Apr 2013, 06:39

Peter,

If you would like to wear glasses thicker on the outside, you should add BO prism. You can easily get used to 5-7 BO.

There are no degrees in prisms, degrees are in cylinder correction in the axis part.

What is your age and actual prescription?


Peter 08 Apr 2013, 06:05

I love thick and strong glasses.

How can they make the glasses on the left sight and right side thicker (not by the nouse)with a prisma?

Is that with Base Out.

I wish to wear glasses both with a prisma 5 BO.

Or is that for the first time very high?

How many degrees is BO? 90, 180, 270 or 0?

Peter


Soundmanpt 05 Apr 2013, 18:32

Heather

Glad to see your still checking in every so often still. I well remember posting with you in here. I know you seemed to enjoy playing tennis and I recall you were finding wearing glasses to be somewhat of a challenge for you because of not being able to wear contacts anymore. Playing certain sports can be more difficult if you have to wear glasses in order to see. I know it would be an added expense but would your doctor not allow you to wear contacts just for sports. I'm sure you likely only play tennis for several hours when you play?

You got the highest index they make so I am sure that helps a lot in keeping your lenses looking nice and it seems like your eyes nay have become stable which I am sure your happy about.

Good hearing from you.


Heather 05 Apr 2013, 18:07

I posted quite some time ago. My prescription is now -5.75 (R) and -6.25 (L). My prescription increased quite a lot in my mid-30s and seems to have stabilised now at age 39. Until my mid-30s I only wore contacts part time but then my prescription rapidly increased to around -4. At the same time I was not able to wear contacts any more so I was stuck with glasses. Needless to say that I need my glasses for absolutely everything now. However, I still hate having to wear them all the time and not having the option of wearing contacts any more. I am wearing 1.74 high index lenses now so the lenses are not too thick and even semi-rimless frames look fine. When I do sports the glasses are really annoying though and they can be a real handicap.


benn 04 Apr 2013, 10:31

CJ

Thanks for the advice.


Cactus Jack 03 Apr 2013, 20:41

spanish,

You have asked for some suggestions on solving a complex problem, but provided only limited information.

It sounds like you understand the importance of index and lens size in controlling the overall lens thickness, but you may not be aware of blank size as a factor in making thin lenses. If a significantly larger blank is used to make a small diameter high plus lens, the edges of the lens after cutting to fit the frame will be much thicker than they need to be and therefore the center of the lens will also be thicker.

There may be other possibilities if they are not contra-indicated by medical conditions. You did not provide your complete prescription, but one possibility if you need significant cylinder would be to a form of GOC (Glasses over Contacts) where a significant part of your sphere correction would be in sphere only contact lenses and the balance of the sphere and all the cylinder would be in relatively thin and light glasses. That assumes that you can wear contact lenses. Other possibilities might include "Internal" contact lenses or IOLs.

There can be many causes of significant hyperopia and it would be helpful if you feel comfortable sharing more your situation with us.

C.


Cactus Jack 03 Apr 2013, 20:24

Oops, should have been addressed to been. Sorry.

C.


Cactus Jack 03 Apr 2013, 20:23

been,

The new prescription has about -0.25 more cylinder and about +0.50 sphere. It isn't very much, but it you might find them noticeably better for reading because of the cylinder change.

If it were me, I think I would be very tempted to order some inexpensive glasses from Zenni and decide which prescription I preferred and then make a decision if I wanted to continue wearing my old prescription or have some glasses made with the new prescription in a more attractive frame.

If you wanted to do something REALLY inexpensive for trial purposes, you might consider ordering single vision glasses with the distance component only and using OTC +2.50 readers over them for reading. Then decide what you want to do.

C.


benn 03 Apr 2013, 17:53

Is this much of a change or is it a restatement?

OLD:

+0.75-2.25x81 Add: 2.50

+0.75-2.75x97 Add: 2.50

New:

+1.25-2.50x85 Add: 2.50

+1.25-3.00x100 Add:2.50

Had to change Dr's.

Thanks.


spanish 03 Apr 2013, 08:23

Hello there!

Lets see if you can help me on my problem since Im just desperated to get a solution.Now, im +15 and as you can imagine my lenses are pretty thick and also finding the right frame for them is an absolute nightmare since they have to be small and of about 49 diameter blah blah.Im wearing a ceys 1.6 reduction type of thing on my lenses and they still look pretty thick.Now im starting to tolerate them but Im still pretty concerned about them and Im only 20yo.The question is where and how on earth could I get them thinner I would swim the ocean to get them they are so heavy and look awefull!

thank you so much! x


John 03 Apr 2013, 01:15

To continue....

http://www.coopereyecare.com/services/qualitylenses.html

There is a diagram on the above we page which shows how the base curve becomes flatter as lenses become more minus.

For -2 lenses, the front (base) curve may be +2 and the rear crave ay be -4. This will give a cosmetically pleasing lens, both for power, thickness.

By the time you need -10 lenses, adding the cosmetic +2 base curve significantly increases the lens thickness, therefore, these lenses are rarely prescribed, although some people will pay extra for these curved front lenses.

For people who need + lenses, it is the back curve that is flattened for high prescriptions. Someone who requires a +5 lens may be given lenses with a front (base) curve of +10 and a rear curve of -5. These lenses will be rather thick. A thinner option would be a front curve +5 and a rear curve flat.


John 03 Apr 2013, 01:06

Hello

Base curve is the amount of curve on the front of the lens. If people are short-sighted like your son, and me, there comes a point where the front of the lens becomes flat, this sometimes around the -10 point. It is something to do with lens thickness.

Most opticians do not bother with this number, they leave to the dispensing optician to order the lens.


Myrna 03 Apr 2013, 00:01

I know contacts have a base curve but I didn't realize that glasses also do -- until today. My son, who is nearsighted, got a new prescription and we went to our optical shop to get it filled.

His prescription has 3 columns filled in (sphere, cylinder, axis) and 2 left blank (add, prism). We have gotten his glasses there since he was a little guy. When the optician pulled his chart, I noticed there was a 4th column filled in, headed "base curve." The spherical numbers on the doctor's prescription form are always minus but I also noticed that the numbers in the base curve column were plus, but descending. They started at +6 and gradually dropped to +1. I meant to ask the optician about this but got distracted and forgot.

My son's previous glasses were -9.25 in one eye and -9.75 in the other. His new glasses will be stronger, -10.50 and -11.00. Does that mean the base curve will be zero?

In summary, what is base curve, why does it go down, and what does that mean? And why isn't it on the dr's form?

Thanks.


Daniel11 02 Apr 2013, 15:43

Definitely one of the best combination between glasses and women i've ever seen!


jared 02 Apr 2013, 13:09

Thebrit-

Thanks so much for the info!!!!!


TheBrit 02 Apr 2013, 12:50

Hi Jared...picture is on "SEEN ON THE WEB"


Jared 02 Apr 2013, 12:40

Hi

Was just wondering where you guys were finding the picture posted by Olek? Is it in an ES thread?

Thanx


TheBrit 02 Apr 2013, 10:38

Hi Daniel,

My prescription is +3.25 and +2.75 with some cylinder in both eyes,Plus of course the 5 BO prism. As CJ said I would be interested in the prescription on the picture posted by Olek..Wow


Cactus Jack 02 Apr 2013, 09:59

Daniel11,

If you have not done so, check out the first picture on Olek's recent post. Very high Base Out prism and probably some minus sphere. There is no way to even begin to guess the prescription.

C.


Daniel11 02 Apr 2013, 09:44

Thebrit,

Hi, on the first prisms glasses you were prescribed for 5 BO prisms?

What is your full prescription? do you have some sphere or it's just prisms? 

I believe about the positive comments! I can't wait to order my specs ....


TheBrit 02 Apr 2013, 07:37

Hi Daniel, I posted earlier but I think it didn't go through so I try again! It seems that prism prescriptions are creating a lot of interest these days.

I was prescribed prisms early this year for double vision,& have now been wearing base out 5 for some weeks. The clarity & comfort is really superb,& I just wish that I had them years earlier.

On the appearance point of view the lenses are noticably thicker,but they highlight themselves very well in my semi rimless frame which has the lense open on the outside. I was never really bothered how thick or thin my lenses were, but having seen how great they look, like you I find that I would really like them very much thicker now. I have had MANY positive comments on how great my glasses look..never had this in the past.

I feel that I will need an increase at my next control,as when tired late evening the DV starts to creep back.. I start to hope it will be significantly increased so the lenses will increase.

Their is much talk that prism lenses become dependent. I can only say that this is the first time I see so well & my eyes feel very comfortable. Add to this the bonus of thicker lenses..

Wish you success with your prisms...


Daniel11 01 Apr 2013, 18:28

Hi Brian!

First, I never even try to put contacts - I like my glasses as they are! 

as I told before, I'm not afraid of thick lenses or getting dependent on my glasses that is the goals.

even when I do know that my eyes will get used to the prisms - I want to do that - also if my lens would be 1.5cm in the edge..  

Thats my fetish for about 5 years...


Brian 01 Apr 2013, 18:08

Daniel, I have exoforia, I started with prisms about 3 1/2 years ago, started at 2BI in each eye and I just got new glasses today that are now 5D BI in each eye.. My distance prescription is -6.00 and -5.25. I used to be able to wear contacts before I got prisms and once you get prisms its hard to go without them.. The inner edges of my glasses are now very thick and my eyes sit pretty far out, I look very wall eyed with the glasses on..


daniel11 01 Apr 2013, 16:35

so,

thank you for all,

im gonna order in the next few days - my first prism glasses.

Pd 60

R: -3.75 -1.25 - 5 prism 5 BO

L: -4.25 -1.00 - 175 prism 5 BO

trying to induce myopia also.

i will wear them full time, as of distance and reading.

when my eyes will get used to them (3-4 months i believe) i will order the next pair, aspiring to -4.5 + 10BO.

thanks again.


Cactus Jack 01 Apr 2013, 11:09

Daniel1,

I should have been a bit clearer about adjusting the PD for prism. It would be best if the PD was not adjusted by you AND by the lens maker. I would suggest listing your actual PD and putting a note on your order to Please adjust the PD for the BO prism" or, if you adjust it (probably best) you should note: "PD already adjusted for BO prism please do not adjust further."

Hopefully they will know what to do. but honestly, it is not certain. Prism is not as common in glasses as it was years ago because muscle surgery is often used to correct muscle problems.

Ideally, PD measurements are made with the eyes looking straight ahead. When you read or your eyes converge for any reason, the PD needs to be adjusted inward so the optical center of the lens and the central axis of vision coincide. This convergence is the reason why bifocal and trifocal PDs are written as a fraction (e.g. 63/60) with the first number being the distance PD and the second number being the near PD.

In the case of BO or BI prism the adjustment is inward for BO prism or outward for BI prism. Incorrect location of the Optical Center of the lens in relation to the Central Axis of vision often causes the glasses to have some apparent distortion or incorrect prescription to the wearer.

To answer your other questions:

1. It is very difficult for you to tell if your eyes have a tendency to turn inward or outward. One clue is double vision when you first wake in the morning. However, if the amount is small, your eye muscle control system can correct the problem so quickly, it may not be noticed. Another clue is occasional double vision when you are very tired.

2. How long you wear the first pair before going to the second pair depends on how well you like the first pair. Because convergence is a naturally occurring thing. You may find that you want to almost immediately go to the second pair. If possible, you should try to wear the glasses full time. If you order with the same frames, the change will not be noticed by anyone, but you.

3. You can order 8s if you want to, but I suspect you would not notice much difference between 8 and 10.

BTW, Adult Strabismus is a recognized condition. Most offen, various forms of strabismus develop during childhood. The most common is esophoria or esotropia where the eyes want to turn inward because of uncorrected hyperopia. Adult strabismus seems to be more often manifest as exophoria or exotropia where the eyes want to turn outward, but esophoria or esotropia is not unheard of in adults. FYI, the simple difference between ...phoria and ...tropia is that with a phoria you have the ability to fuse the two images (sometimes with significant effort) and with a tropia you simply cannot do it.

C.


daniel11 01 Apr 2013, 10:32

well,

hi, roy

i'm well aware that there is a possibilty that my eyes will get usedto the prisms, but, i must say that i'm always thrilled when i see thick lenses - and it's been that way for years - ... even my girlfriend has -7 glasses... i always wanted glasses stronger than my current prescription. i always looking in the edge of glasses - and found it very beautiful!

it's a way of life - and i'm not affraid of getting depand on thick glasses, i'v worn my girlfriend glasses just for fun for many times, and people know that i do have fetish for thicked eyeglasses.

it's was only a matter of time until i induce my myopia or making somehow my glasses thicker.

i hope i will be able to get used to them quickley, as i told you i thought of doing to this for a long time - and i now i'm starting....

one Last ask from you Roy - can you send some images of your glasses from the first pair to your current pair to danmit696@gmail.com - it's intersting...

thanks all,


Roy 01 Apr 2013, 09:46

Daniel1

I can back up what CJ said from my own experience. I originally tried a 4 base-out prism in my right eye to increase the lens outer edge thickness to match that of my left eye. (My left eye was about -6sph but my right eye only -3.5). It worked perfectly and I had no trouble adapting to the prism. I soon increased the prism to 6 base-out right eye and 2 base-out left eye.

Within two or three years of wearing prism correction continuously I found I was getting double-vision without glasses and it was being picked up in eye tests. I did not tell the optometrist I had been wearing prisms. She was puzzled by the apparent onset of strabismus and sent me to a hospital specialist for more tests. The consultant simply suggested that I carry on with the prism correction as required.

I now wear, and need, a total of about 20 prism dioptres shared between right and left lenses. I can manage with 10 to 12 dioptres shared when looking straight ahead, but need the full 20 dioptres to avoid double-vision over my full field of view.

You should therefore be aware that wearing prisms may well induce permanent strabismus which cannot (as far as I am aware) cannot be corrected with contact lenses or lasik treatment.

Even with 1.67 index plastic my current lenses have an outer edge thickness of around 1cm. The lens edges are left un-polished and are are fitted to a nice thin (only 2mm thick) titanium frame to emphasize the thickness.


Melyssa 01 Apr 2013, 09:36

Specs4Me,

Mais oui, mon ami!


Specs4Me 01 Apr 2013, 09:24

Melyssa,

Me parece que tu nos ha dicho que su Rx ceda cerca de -9, con este RX talvez nos estas "jalando la peirna" sendo que hoy is el primero de Abril!


Melyssa 01 Apr 2013, 06:55

Mi más reciente RX:

Derecha: -4.75 +2.00 90

Izquierda: -4.75 +2.00 90

Añadir: +2.50

Abril Tonto!


svensont 01 Apr 2013, 05:33

You don't have to make changes if you want to use the glasses while you're on the computer. Your eyes naturally converge when you're reading something, BO prism will cause them to converge more.

You are young and I think you have big chances to induce more myopia. You can order stronger sphere in them, ie. 1D more. And of course, you can try more BO prism at first, but it may be harder, try maybe 6 or 7 BO.

Wear the glasses as you like to, you can try full time, but as CJ said, if your eyes have a tendency to over converge, you may create the need for prism.


Hopefully Helpful 01 Apr 2013, 05:10

CJ's advise is always spot on but you perhaps need to clarify if you yourself should cut the PD number as in some case I think he has said that the manufacturer will make this adjustment in the making.Best of luck hope you succeed


Daniel11 01 Apr 2013, 05:00

Hi cactus jack,

Thank you for response!

How can I know if my eyes have tendency to over converge?

I want to use the glasses for  daily use that means distance and reading- but if I want to use them  while I'm on the computer, I need to make changes? That means should I have 2 prescription, first for distance and second for reading?

anyway-

My previous pd is 63.

and for the glasses - the first prescription -

Pd 60

R: -3.00  -1.25 - 5 prism 5 BO

L: -3.50  -1.00 - 175 prism 5 BO

Second glasses - pd 58.

R: -3.50  -1.25 - 5.    prism 10BO

L: -4.00  -1.00 - 175    Prism 10BO

How much time do you think I will have to be with the first glasses before I put the second glasses?

I'm so expecting that! Should I wear them full time?

Is there a way to start with 8 prisms?

Any other useful advices before I get to order? 

I think the second glasses can easily get to 1.2cm thickness - I can't wait!

Thanks!


Cactus jack 31 Mar 2013, 22:45

Daniel1,

You could probably easily tolerate up to 10 prism diopters Base Out in each eye provided you adjust the PD inward about 5 mm. That much prism will cause your eyes to converge as if you were reading at a distance of about 40 cm for distance and of course more convergence will occur if you wear them while reading.

You might want to consider trying 5 prism diopters Base Out in each eye and reducing your PD by about 3 mm. When you find this comfortable, then increase it to 10 BO in each eye. You might also want to consider increasing your sphere by maybe -0.50 or so in each eye to help your eyes converge. Never adjust your cylinder or axis from that refracted.

You need to understand that you can get accustomed to wearing prism and you may get to where you see double without prism correction in your glasses and it is possible that you will ultimately need more prism in your glasses.

If your eyes DO NOT have a tendency to over converge, you can pretty much reverse the "induced strabismus" by wearing glasses without prism for a week or so. However, if your eyes DO have a tendency to over converge, you may find the prism very comfortable and be reluctant to go back to wearing glasses without prism.

FYI, BO prism will typically increase the outer edge thickness by about 1 mm per prism diopter from its no prism thickness. The exact thickness increase depends on the Index of Refraction and the lens width.

C.


Daniel11 31 Mar 2013, 20:51

Hello every one!

I'm from Israel and 21 yo..

My prescription right now is this:

R: -3.00  -1.25 - 5

L: -3.50  -1.00 - 175

and I want to ask that, what would happen if I would add to my prescription base out prisms?

 how many BO prisms my eyes could suffer? Is there any possibility that my will get used to the prisms?

Why am I asking this? - ok, I love thick lenses! Don't ask why,  and I want to get my glasses lenses thicker... once i saw this video (http://www.youtube.com/watch?v=YxdNAqoTePc) I decided iwant to get my glasses to this thickness and more!

I don't want doing GOC - it's cheating....  I read this forum a lot - and I'm very enjoyed! 

For the start how many prisms I should put into my glasses?

yours,

Daniel


Cactus Jack 30 Mar 2013, 17:42

Joanie,

That is a significant increase in only 6 months and you are right to be concerned about it. You might want to consider having your daughter seen by a specialist in Progressive Myopia, but there may not be much that can be done, because it likely has a genetic component. Often, the source is more than one generation back.

At your daughter's age, there are a number of hormonal changes that may be causing eyeball growth which is probably the source of the increasing myopia. There are a couple of things that you can do cosmetically to improve the appearance of her glasses. High index lenses and high quality antireflective coating on her lenses.

Another thing that might slow the increase is to wear and older, weaker pair of glasses for reading because that may reduce the accommodative stress which is believed to trigger eyeball growth where a person is genetically disposed toward myopia.

One of the dangers of rapid eyeball growth and high myopia is the possibility of retinal detachment, which can lead to loss of sight if not treated immediately. Young people are NOT immune to retinal detachment. I heard recently about a 10 year old boy who suffered retinal detachment. Fortunately, he was able to get treatment before the damage was permanent and his vision has been restored. I don't know for sure if high myopia was involved, but it is likely.

May I ask where you live?

C.


Joanie 30 Mar 2013, 08:25

I have a daughter in 10th grade of high school. Recently, the school nurse sent home a note that she was having trouble seeing the board and failed an eye screening. I just got home from the optometrist. He said she got MUCH more nearsighted and needed MUCH stronger glasses. I have 20/20 vision. My husband has weak glasses. Is my daughter's vision a major concern? Her old glasses that she got in September are (R eye) -7.75 sphere -1.75 cylinder 75 axis (L eye) -7.00 sphere -2.00 cylinder 110 axis. Her new prescription reads (R eye) -9.50 sphere -1.75 cylinder 80 axis (L eye) -9.00 sphere -1.75 cylinder 100 axis.

We just picked up the new glasses and both of us are in shock. They are so much thicker, everything looks tiny and the reflections are so giant you can barely see her eyes.

I am really scared for her.


Juicebox 23 Mar 2013, 06:29

Bob,

When I had a prescription similar to yours, I wore them for lectures and going to the cinema etc. if I'd have learned to drive, I would have definitely worn them then as I wouldn't have been able to pass the eye exam. My prescription has gone up quite a bit since then so now I have no choice but to wear glasses or contacts. I used to think wearing glasses was horrible, but over the past few months its grown on me...so don't worry if its new to you, you'll get used to it! Enjoy your glasses and better vision :)


Cactus jack 22 Mar 2013, 23:43

Bob,

To make your prescription a bit easier to understand, I have converted it from + cylinder to - cylinder, which is what a lens maker will do prior to making the lenses. Optically, the two prescriptions are identical.

R Sphere -0.75, Cylinder -0.50, Axis 165

L Sphere -1.00, Cylinder -0.50, Axis 20

In practical terms, the Sphere means that everything beyond about 1 meter or 40 inches is increasingly fuzzy. The cylinder means that everything at all distances is a little fuzzy.

Many people with that prescription would wear their glasses most of the time. Definitely, when driving and probably when watching TV or the cinema. However, other than driving, it is actually up to you.

You should wear them full time for about two weeks and then make a decision about how much to wear them. Initially, you may think the glasses have made your vision worse, but that is not correct. Vision actually occurs in the brain and the eyes are merely biological cameras. The brain has amazing processing power to "improve" the quality of the images from your eyes, IF the brain knows what something is supposed to look like. The brain can even produce images with your eyes closed, as in a dream.

It takes a lot of work and energy for your brain to process blurry images. With your glasses, your eyes will be delivering high definition (in focus) images and it will not take your brain long to get used to the reduced work load and will stop correcting the images you see. Without your glasses, your brain will have to go back to work and that will not happen instantly. In fact, your brain may rebel at having to go back to work and the result can be fatigue and headaches.

Please let us know how you get on with the glasses and what you think of clear sharp vision.

There may be a few comments from your friends, but that will stop in a day or two. They may want to try your glasses and some will comment that you must be "blind". Often, some will not comment at all, but give the glasses back. That usually means that they just discovered that their vision is better with the glasses and they experienced a bit of a shock that they might also need an eye exam.

C.


Bob 22 Mar 2013, 22:08

How often would most people wear this type of prescription?

R - 1.25 + 0.5 75

L -1.5 + 0.5 110

I am 27 and haven't had glasses before.


Frank 10 Mar 2013, 00:05

Cactus Jack,

thank you very much for your detailed response. I really appreciate that you share your experience and knowledge. From your posts I learned a lot more than from my optometrist.

Regarding double vision, knowing that you can still fuse the images despite your high correction relieves my worries a bit.

Currently I am actually really enjoying (probably subjectively) the enhanced depth perception, but your guess that the prescription might go up is not unrealistic. (In my previous post I in fact meant fusing instead of focusing. You interpreted it correctly. Not quite on speed with the terminology). In fact if I now look up over the frame (which I do - or probably better did - from time to time), I pretty much immediately feel a stinging headache. I will see how things develop during the next few days.

Again, thank you very much for the insight.

Frank


Cactus Jack 09 Mar 2013, 21:44

Frank,

What you are experiencing is pretty normal. The muscle stress you may feel is caused by your eye positioning muscles to deal with the fact that some of the extra work they have been having to do, is being done for them by the glasses. That should disappear in a few days.

Don't be surprised if two things happen. One, it is very likely that your optometrist did not fully correct your muscle imbalance and you may need some additional prism in the future. The second thing is that as your eye positioning muscles relax, you may experience some double vision without your glasses. You can probably correct that by concentrating on fusing the images, but that is not the way it is supposed to work. Ideally, fusion of the two images should be automatic and effortless, Based on your comment about focusing (fusing?) instantly with the prism indicates that it is a very desirable addition to your prescription.

If you need additional prism in the future, it is likely that it will be balanced with approximately 1/2 the total correction in each eye.

One thing that may offer some comfort in the "vanity" department. Prism of less than about 7 prism diopters in each eye is not very noticeable to others - unless they are OOs and know exactly what to look for.

I developed what is called adult strabismus (esophoria) in my late 30s (75 now) and I have worn Base Out prism for many years. Even with 15/15 BO about all that anyone may notice is that the outer edges of my glasses lenses are a bit thick. Esophoria means that your eyes want to turn inward, but with effort you can still fuse the images. Even with 15/15 BO I can still fuse the images without my glasses, but if I relax and don't concentrate, my eyes turn inward and I see double. With prism in my glasses, the images are fused for me and I can concentrate on other, more important things.

If you have other questions, please don't hesitate to ask.

C.


Frank 09 Mar 2013, 20:31

Cactus Jack,

my age is 31.

Thank you for your explanation on the matter. I realized that when wearing the glasses I have focus instantly. Usually it takes a fraction of a second, especially when switching from near to distance. So the prisms seem to take away some of the muscle work. Currently I experience quite some strain on the eye muscles while wearing them, but I assume that will be exactly that relaxation you described which has been suppressed for decades.

The lens seems to be indeed a prism lens as it sticks out quite a bit on the side - at least more than I am used to with my otherwise very low prescription.

Reading through the ES threads I read about the 'addiction' that comes with prisms. In fact many of the wearers ended up with double vision. That sounds a bit scary and I can already retrace the desire to wear the prism glasses more and more.

My optometrist did not give me any such information. (In fact he didn't even use the word prism but referred to it as being 'an optical component to reduce strain for close work'.) I was thinking about perhaps wearing them only strictly for working and otherwise rely on my old glasses, but, as mentioned in an earlier post, it is quite hard for me to switch back once wearing them during the day.

Sorry for the long post, but reading through your explanation and ES threads sparked some thoughts. Just want to be sure I am heading down the right path ;)


Cactus jack 09 Mar 2013, 10:38

Frank,

The 66/62 is the far PD/near PD you mentioned. The lens maker probably "induced" that small amount of prism by slightly displacing the Optical Center of that lens inward. "Induced" in this case means something entirely different than "Induced Myopia".

FYI, 2 prism diopters, by definition, bend or displace rays of light 2 cm at a distance of 1 meter or 100 cm. In angular terms the angular displacement is 1.14 degrees. It is likely that you have a very small muscle imbalance. While it is small, you are having to expend constant effort to keep images fused. The small amount of prism relieves your eye muscles of that burden. Until now, you may have been experiencing some unexplained mild fatigue and what you are experiencing is the prism in your glasses relieving that extra work and fusing the images for you.

May I ask your age?

C.


Frank 09 Mar 2013, 02:44

Hello guys,

I recently got back from an eye exam and ended up having an updated prescription which now includes mild prism correction.

sph. cyl. angle pdpt

OD: +1.25 -1.50 175 2 BO

OS: +1.5 -2.00 180

My question: The PD reads 66/62. Does this refer to 'far PD'/'near PD' or is it the PD adjustment for the right lens because of the prism. Or is that always calculated by the optometrist?

I hope I explained my question clear enough.

By the way, wearing prisms was new to me and it seems I adjusted fairly quickly. Wore them yesterday and today and I really feel that I cannot just change back to my old specs once I wore them during the day... Bit of a concern but I am FT wearer anyway....

Good site! Keep the good work up!


Clare 08 Mar 2013, 15:37

I'd definitely agree that long term wearing contacts all the time isn't a good option. My optician says at least one day without contacts (but for me at the moment, two).


Soundmanpt 05 Mar 2013, 19:48

George

Your daughters eyes really didn't change all that much considering it has been 2.5 years she got her last glasses. The prescription she just got I am assuming is for contacts again? So her cyl (astigmatisms)may have improved just enough, meaning she now may have -.50 for her cyl and it is common for doctors to just increase her sph (distance) prescription a bit in place of the having the correction in her cyl. So had they tried that 2.5 years ago her prescription would have been about -1.50 in both eyes, so now her eyes have changed some in that time but not much at all.

Even better her eyes are likely to soon stop changing as well.

Did she get new glasses when she went this time or for that matter did she get glasses 2.5 years ago or is she just wearing contacts only? Her eyes are at a point now that she needs full time correction and wearing contacts constantly all the time is not a good thing for her to be doing. She needs to have glasses so she take off her contacts in the evening and also so she wear rest her eyes at least once a week by wearing glasses for a full day. Not to mention if she ever gets and an eye infection which happens to nearly every contact wearer at some point she will not be able to see well enough to do her job or see at school and she couldn't drive to work or school.


Goerge 05 Mar 2013, 17:58

My 21 yr old daughter just got her new prescription, R -2.50, L -2.25. Her previous script 2.5 yrs ago was -1.00, -1.00 w -.75 astigmatism in each eye. She no longer needs toric cls which is nice but I'm confused by the drastic change. Any thoughts? Thx


 05 Mar 2013, 12:06

My eye that's crossed has hardly any vision in it like when I close my right eye everything's blurry so I don't know if that has anything to do with not having prisms?

I'm and 17 and I've worn glasses for as long as I can remember so no it's not my first. I've just never really paid attention to my prescribtion or anything before so was just curios to know.

Thanks


svensont 05 Mar 2013, 11:45

If you are crosseyed then I'm confused why you don't have any prism in your prescription. Contact lenses are not correcting strabismus, so if you are crosseyed you will have to wear glasses.

What is your age if I can ask?

Is that your first prescription?


 05 Mar 2013, 10:36

Also going by my prescribtion below would I ever be suitable for getting contact lenses. I am cross eyed so I don't know if that would mean anything. I am going to ask when I have my next eye test.

Thanks to anyone who helps


 05 Mar 2013, 09:34

Thank you very much :)


svensont 05 Mar 2013, 09:23

You are a hyperope with very slight astigmatism. There is no prisms in your glasses prescription. I think the zeros don't mean anything, it's the same as blank. You also have no add in the lenses.


 05 Mar 2013, 08:56

i don't understand my prescribtion, can anyone help please

right - sph +1.25

cyl +0.25

axis 35

left - sph +4.00

cyl +0.25

axis 5

the prism and base/axis column are left blank on both eyes, so does that mean my lenses have no prism in them?

there is also a lot of extra zeros on my prescribtion don't know if that means anything. if it's easier i will post a picture of my prescribtion.

thanks


Aubrac 02 Mar 2013, 06:28

Oops sorry, last post was from me.


 02 Mar 2013, 06:27

Isabella

My sister had glasses at 13 and ended with about -6 prescription. All four of her kids (now all adults) have glasses/contacts of between -3 and -7 while I have -5 and all three of my children have 20/20 vision - so don't really know how the genetics work!

As others have said, your children probably have quite a few more changes ahead of them but when things stabilise you can get ultra thin high index lenses that will considerably reduce minification, cut-in, and thickness. However, these are very expensive and not worth bothering with if their prescription changes in six months time.

Smaller lenses will have thinner edge thickness, and flat fronted lenses can also make lenses appear thinner so these can be options for you.


Isabella 02 Mar 2013, 02:51

Julian

The 2 older ones are girls. The youngest is a boy. Perfect arrangement for baby sitting.


Julian 02 Mar 2013, 02:46

Isabella: the other thing to bear in mind is that it's quite common for the children to be more myopic than the myopic parent. I've mentioned this before and other people agree. Also, school kids these days are on computers a lot of the time, and that's another factor that encourages myopia if there's a tendency that way. Your older two are already 'officially' high myopes (-6 or more) and this is likely to progress into their early 20s with coke bottles a fact of life. Your best course is to encourage them to get smart frames and enjoy wearing them.

By they way you don't mention what combination of boys and girls you have.


Isabella 01 Mar 2013, 23:32

GreginColo

I don't know his numbers. He needed them for everything but they didn't seem especially strong. Eminently forgettable.


GreginColo 01 Mar 2013, 23:09

Isabella: you mentioned your ex was nearsighted but didn't mention was is Rx is or was. If his Rx was fairly strong then your kids myopia is likely inherited and they may be following his progression. Do you know anything about his visual history?


specs4ever 01 Mar 2013, 20:30

Isabella, in answer to your questions, it is fairly normal for a nearsighted person's prescription to get stronger each time. Your children became myopic at an early age, but they have had some pretty serious progression. -9D for a 15 year old and -7D for a 13 year old is pretty strong for their ages, and it is highly likely that their prescription swill become even higher during the next 6 years or so.

There are a number of theory's as to how to slow down the increases. One suggestion is bifocals. I have heard many varied responses on this theory, but most feel that it doesn't work, and makes the person dependend on wearing a reading add at an earlier age. Another suggestion is to have them take more frequent breaks from close work. This does seem to help. And if you can do it, try to get them to put a bit of distance between their reading material and the end of their nose.

One thing I do suggest is to not get them contact lenses. It might be a wrong theory, but I feel that children who wear contacts for everything will experience a faster progression than those people who wear glasses. Glasses slip down the nose and the power is reduced while they read, but with contacts they are looking through the full distance prescription 100% of the time. This is not proven, but is just a theory of mine(and others)

As to your third question the answer is yes. It is just the nature of a minus lens


Isabella 01 Mar 2013, 19:43

I posted this on Ask.com and Google Answers and didn't get any serious answers. Maybe the 3rd time will be the charm.

I have 20/20 vision and I'm divorced. My ex was nearsighted. All 3 of my kids (age 15, 13 and 10) are nearsighted and their glasses get stronger at every visit to the optometrist. In round numbers their current prescriptions are -9, -7 and -3.

Question 1: Is it normal for their prescriptions to become more negative every time they are examined?

Question 2: Are the strength of their lenses normal for their ages?

Question 3: Each time the glasses get stronger, the reflections get bigger and their faces get smaller. Must this happen?

Thanks.


Clare 20 Feb 2013, 15:45

Juicebox - stick with your current ones if you like them. As I've lamented, until recently I didn't have any glasses wearing friends (all CL wearers) but one who is recently forced to wear glasses is thinking of getting the previous pair updated to the new prescription. I've only ever had one pair and this pair suits as I'd wear contacts for social occasions. These are fine for work, as needed, and just mooching/shopping at the weekends. Let us know how you get on please!


Juicebox 19 Feb 2013, 17:29

Clare,

Those frames are pretty rad, I'm sure you look great in them :) I'm pretty happy with my current frames which is why I'm probably going to get new lenses in them. I'm thinking about getting some more hipster-ish ones as well though, that way if I have more fashionable frames I may be inclined to wear them more.

Dan,

Yeah I think its good to have a balance between the two. I think my sister is -2.5 and my dad is -6. Not sure about my mum though.


Clare 19 Feb 2013, 14:11

Juicebox - I found this site which sells the same frames as mine. Good reaction from people who've seen them so far

https://www.vision2you.co.uk/store/face-a-face/face-a-face-axess-5

I've always found it really hard finding glasses that I think suit me. These for now I feel more comfortable in than I have so far. Hopefully, as I get more used to glasses.I'll get over my self-consciousness about how I look in them. Hope you find some frames you like too.


Dan 19 Feb 2013, 13:42

Juicebox,

Do your the prescriptions of your family members?

I know how you feel about hating to wear glasses. I got them first when I was 18 and never wore them. Then I got contacts when I was 20 and didn't wear glasses much. Now, at 23, I've finally found some really good frames and now I'm about 60/40 contacts vs. glasses.


KAYE 19 Feb 2013, 13:06

2.00 and 2.25.

Not really bad.

My dad was legally blind before his surgeries, though. Not to mention his conditions can be genetic, so I might get there someday.


Juicebox 18 Feb 2013, 19:17

Dan,

I'm really excited to graduate so I can start getting some good experience. Can't wait! Yeah I don't mind them now, I used to hate wearing them. So much so that I lived an entire year at uni without my housemates seeing me in my glasses! I hope my prescription stops going up though. I'm glad you've avoided most of the myopia in your family :) meteorology sounds interesting!


Dan 18 Feb 2013, 18:10

Juicebox,

Best of luck finding work when you leave school! I studied meteorology while I was in college. Graduated a year and a half ago and have been employed thus far. You sound like you are in an exciting field!

I'm sorry you have inherited the myopia in your family, but it seems that you don't mind the glasses? Both my parents and my brother are all over -4, yet I have managed to stay under -2...so far.


Juicebox 18 Feb 2013, 16:33

Clare,

Im sure they look great. What are they like? I'm in the process of trying to find some new frames, which is taking a while because I have a petite face. I may just get new lenses in my old ones though.


Clare 18 Feb 2013, 14:37

Juicebox - as I suppose I will never get back to my over-zealous contacts wearing days, I quite like the idea of switching between glasses and contacts. These glasses are the best yet but I still wonder if they look okay, like you I feel more confident without them!


Juicebox 18 Feb 2013, 13:54

Clare,

I guess it's good that you still have the option to wear contacts socially instead of not at all :) I kind of like being able to switch things up, even if I feel more confident when I'm not wearing glasses.

Dan,

You remembered correctly, it did go up quite a bit which is why they said to come back sooner than a year. I thought I'd managed to avoid the myopia in my family but clearly not! I'm hoping to go into editing for TV shows or music videos so there's many a computer in my future (hopefully - if I can actually get work!) if you don't mind me asking, what did you study?


Dan 18 Feb 2013, 07:48

Juicebox,

If i remember correctly, your last prescription this past summer was -1.75. That's a fairly hefty increase in less than a year. Interestingly, I've had -1.25 for the past 3 years and it hasn't gone up even though I was in college and now spend at least 10 hours a day on the computer.


David 17 Feb 2013, 11:24

Thanks for your comment Specs4ever. The only one I know of in my wife's family who wears glasses is her aunt - her mom's younger sister. I had never seen her wearing glasses before until we were at a funeral about a month ago and she was wearing her glasses instead of contacts. She is a tiny little lady and her glasses were the rectangular dark framed wide sides that have been popular lately. You could see that her lenses were very thick, and there was a line at the bottom of the lenses so I could guess they were bifocals. My wife said that her aunt couldn't wear her contacts anymore


Specs4ever 17 Feb 2013, 09:00

David- your daughter could be on the path towards high myopia. A 6 year old really shouldn't be wearing glasses yet. But she is, and there isn't much you can do about it. If her myopia continues to increase you should indeed see a pediatric ophthalmologist. Possibly they will give her bifocals, or they might treat her with atropine, which seems to be slowing the progress of myopia in children. You say your wife is a -6D myope. Ar there any other myopes in her family or yours?


David 17 Feb 2013, 08:39

Took our daughter to the eye doctor in Aug 2012 because my wife thought she was squinting a lot. She needed a prescription of -2.25 x -1.25 x 30 and -2.50 x -1.00 x 135. Doctor said this was a strong first prescription. She turned 6 in November and a week ago Saturday my wife, her 2 year older sister and I were at the mall. Wife and older daughter sat down and younger daughter and I went to order. Meg ordered the same as her sister wanted and when we got the food she carried one tray and I carried the other. We were very close to my wife and daughter, but Meg didn't seem to be able to see them waving at her. We asked her if she could see a few signs around and she couldn't. So we took her to Lenscrafters. She needed a stronger prescription and her new one is -4.00 x -2.00 x 30 and -4,25 x -2.00 x 135. We got her new glasses which she has been wearing for the week. This doctor said this happens sometimes, but we should keep an eye on her and if she seems to be squinting again anytime soon we should see a specialist. Wife is a -6D contact lens wearer, her older sister and I don't wear glasses, Should we be worried about this, and if so is there anything we can do to stop her eyes from getting worse?


Clare 17 Feb 2013, 05:39

Juicebox - yes, I've got used to it in the last six months - no option! Okay now wearing glasses at work, which is progress, but only wear contacts socially at the moment.


Juicebox 16 Feb 2013, 18:09

Andrew,

Thanks for your response. Yeah my degree has a lot of computer work as well as readings for seminars so I guess that could be the reason. Yeah new frames are the upside I guess, though I have a petite face so it can be hard to find frames that suit me at times!

Clare,

I'd say I'm about 50/50. I wear glasses while I'm at home and contacts when I go to parties/play sports etc. For lectures it depends on what time I have to be up really - haha! I'd say I've come around to the idea of wearing glasses a lot more than before, but I'm not 100% there yet, I still feel like I'm flawed and don't want people knowing, but I'm definitely a lot better :) from your posts I'm guessing you're a lot more comfortable too?


Clare 16 Feb 2013, 04:50

Juicebox - your prescription is the same as mine now. Do you mostly wear contacts or did you get used to the idea of wearing glasses?


Andrew 15 Feb 2013, 13:25

Juicebox,

While you might still have perfect eyesight if you had left school at 16 and taken up a manual outdoor job, you could blame your deteriorating eyesight on the fact that you have remained in education - or it may have happened anyway. It is not uncommon for prescriptions to increase more rapidly among students who need to do a lot of close work (my own went up by 2 diopter in my first two years at university), so you have nothing to worry about on that score. Some people like getting a new prescription as it is a good excuse for getting new glasses, so at least by keeping it up to date you can see clearly and look fashionable at the same time.


Juicebox 15 Feb 2013, 05:33

Went for a contact lens check up the other day, it was supposed to be a few months ago but I've been busy with uni and exams...oh the joys of my final year! I mentioned that lecture slides were beginning to look blurry again and ended up getting a new prescription.

It is

R: SPH -3.00 -0.25 165

L: SPH -2.75 -0.25 25

They said to come back in 6 months because my rx went up quite a bit. What I don't understand is that my eyes were fine before coming to uni, am I doing this to myself?


Cactus jack 28 Jan 2013, 09:30

Nick,

Your ophthalmologists prescription converted to - cylinder notation is:

R -2.75, -0.50 x 88

L -2.50, -0.50 x 92 Add +2.50

You optometrist prescription was:

R: -3.00 -0.25 x 130

L: -2.50 -0.25 x 065 add +2.50

Not a lot of difference except in the cylinder and axis.

Low levels of cylinder and axis are very difficult to measure because it is very subjective. The axis is particularly hard to measure because the patient is asked to judge relative blurriness as the axis angle is bracketed. When the examiner flips the supplemental lens back and forth, the straight lines that make up the letters can change from sharp to blurry depending on the direction of the straight lines that make up the letter. That can really be confusing.

I try to concentrate on an "O" if there is one on the line I am asked to read. In addition, I ask the examiner (before the exam, if I don't know the examiner) to let me "fine tune" the axis when he/she has finished the exam for each eye individually.

The way that works is that the examiner places my hand on the axis knob with the smallest line displayed and I turn the knob back and forth a bit to find the clearest spot. Sort of like tuning an old TV or radio for the best picture or sound.

One final check I like to make for a balanced prescription for each eye occurs when you are first shown separated images from both eyes. Compare the sharpness of the two images. If one is clearer than the other, you need to say something. Usually the examiner will change the sphere on the sharpest image to make them appear the same. Don't worry at this point because that will be corrected when the sphere correction of both eyes together is adjusted.

If you want to try the new prescription, I would suggest ordering the lowest cost glasses you can from an online retailer such as Zenni. You might even consider a very low cost single vision distance pair to see if you can tell any difference before spending more. I doubt you will be able to tell much difference.

C.


Nick 28 Jan 2013, 08:07

I have a question for Cactus Jack or anyone else who can help me figure this out.

This is my current prescription which I have had from my regular optometrist:

R: -3.00 -0.25 x 130

L: -2.50 -0.25 x 065 add +2.50

This time I had the optometrist in my ophthamologist's office do a refraction exam while I was there for an annual retina check for type 2 diabetes (I am in great shape with that.) This is the prescription I was given:

R: -3.25 +0.50 x 178

L: -3.00 +0.50 x 002 add 2.50

I know ophthamolgoists write their prescriptions with + cylinder, but I'm having a hard time figuring out how much astigmatism correction I will actually have. Is this actually a weaker prescription?

I feel as though I am seeing pretty well with the current prescription.

Thank you.


Cactus Jack 26 Jan 2013, 22:00

IrishJohn,

Thank you for the information. In addition to the mild myopia, you also have a bit of astigmatism in one eye, but nothing to get excited about. I still suggest wearing them full time for a couple of weeks and then decide when you want to wear them. You should wear your glasses if you drive.

Please keep us posted on how you are doing and let us know if you would like to order some low cost glasses on line. We will help you.

C.


IrishJohn 26 Jan 2013, 17:53

Hi guys

Thanks for your response. Here are my details:

1 Your age: 31

2. Occupation: IT

3 Where do you live (country): Ireland

4. Your complete prescription: -1 -0.25 90, -1 0 0


Cactus jack 25 Jan 2013, 23:29

IrishJohn,

Welcome. I try to stick to the technical side of things and perhaps I can help you understand your prescription.

Usually a simple glasses prescription has the following components:

OD (Right Eye) Sphere, Cylinder, and Axis

OS (Left Eye) Sphere, Cylinder, and Axis

Pupillary Distance (PD) - Often this is omitted, but you need it to order glasses. Fortunately, it is easy to measure.

Sometimes, there will be a ADD for bifocals and maybe Prism if you have muscle imbalance problems.

What do the numbers do?

1st number: Sphere is either a - number or a + number. - numbers correct for nearsightedness or myopia. + numbers correct for farsightedness or hyperopia and sometimes for presbyopia when you have trouble reading or doing close work. Myopia and Hyperopia are usually caused by your eyeball being a little to long or too short for the lenses in your eyes

2nd number: Cylinder can - or + or sometimes not there at all. Cylinder corrects astigmatism which is cause by uneven curvature of your cornea. If cylinder is listed, an Axis will also be listed.

3rd number: Axis, which is the angle that the long axis of the cylinder correction. The number will be from 0 to 180 degrees. By convention 0 and 180 are horizontal and 90 is vertical. More to it than this, but that is enough for now.

You said that you had -1 in each eye. It is likely that that is the Sphere correction for very mild myopia or nearsightedness. If there is no cylinder listed, that means that everything beyond 1 meter from your eyes gets increasingly blurry. Often people with mild myopia don't wear their glasses full time, unless they drive, but it is up to you. If you find that you like being able to read distant signs, recognize faces across a street, see stars in the sky, and leaves on trees, you should wear them full time. One thing to always remember is that you wear glasses for YOUR benefit and not for the benefit of others. Glasses are merely a tool to help you see clearly at all distances.

My suggestion would be to wear them full time for two weeks and then make a decision about when you want to wear them.

Initially, you may think that the glasses have made your vision worse. Not true. Vision actually occurs in the brain and the eyes are merely biological cameras. The brain has the ability to process slightly blurry images and clear them up some, IF it knows what something is supposed to look like, but it takes lots of extra work. Glasses relieve that extra work and it does not take long for your brain to decide that it really does not like having to do the extra work. When that happens, you will think that your vision has gotten worse.

There is lots to learn about vision and optics if you are interested. If you have more questions, please feel free to ask.

I have a few questions:

1 Your age

2. Occupation

3 Where do you live (country)

4. Your complete prescription

C.


Juicebox 25 Jan 2013, 21:02

IrishJohn,

Hi! I'm -1.75 in both eyes and I wear mine nearly all the time. I didn't used to (playing the female vanity card here) but I'm getting a lot better. Having said that, I have a friend with a prescription about the same as your and he wears his all the time. Welcome to the club!


IrishJohn 25 Jan 2013, 16:08

Hi,

I got my first prescription glasses today. They are -1 in each eye. Anyone have a similar prescription? How often do you wear them?

J


Soundmanpt 16 Jan 2013, 19:30

anne

I can understand that you probably do feel like your glasses are very strong and even feel nearly blind now without your glasses, but I did not mean in anyway that you don't need your glasses for most everything. However there are many in this very chat room with much higher prescriptions than yours, in some cases as much as 4 times stronger.

By the way if your first glasses were around -2.00 you did nothing wrong by wearing them full time as you did. I'm sure after wearing them for a few days you could hardly do without them. Now as much as I hate to tell you but the fact that you only first got glasses at 20 years of age your mother is probably correct that if you spend a great deal of time on a computer that could very well be what made your eyes bad.

Too many get so involved in there work or even play on computers that they don't let their eyes rest by looking out a window or just going to the rest room. It allows your eyes to refocus. If you are still on a computer for long hours it will be helpful to take frequent breaks if only for a few short minutes so your eyes don't become transfixed at one distance too long.


anne 16 Jan 2013, 19:14

how do you mean there not strong? i cant go anywhere without them on. so blind.

i think they were -2.00 my eyes were feeling tired and i couldnt see distance so had to go to the opticians. i think when i first got glasses i was shocked on how clear everything was and how my eyes felt. then you just accept wearing glasses and contacts to see and now im stuck with them. my mother asks me what have i done to my eyes using the computer too long.


Soundmanpt 15 Jan 2013, 19:03

anne

Do you have any idea what the prescription was in your first glasses? I assume you have gotten several increases during the 5 years? So you got your first glasses about when you were 20 yrs old. Being 25 now should mean your eyes should become stable very soon. At any rate your glasses should not need to be made stronger for too much longer. And the changes should be very small as well.

You probably did no real harm by wearing your glasses full time when you got them. Your eyes were still going to change even with limited wear.

You have a very nice prescription where your glasses look very nice and are necessary but not all that strong.


anne 15 Jan 2013, 18:40

5 years ive been wearing glasses sorry. yes when i first got glasses i wore them all the time and now i cant be without them. im 25 so my eyes will stay like this. well doesnt really matter if i get more shortsighted because -5.00 is bad


Soundmanpt 13 Jan 2013, 11:55

anne

So you got your first glasses 4 years ago, do you have any idea what the prescription they were? Were they strong enough that you started wearing them full time right away or did full time come as your glasses got stronger?

Your wording is a bit off stronger glasses don't make your eyes weaker, but your eyes being weaker means you need stronger glasses.


Aubrac 13 Jan 2013, 02:38

Anne

Hello Anne, may I ask what age group you are in, and what your prescription history is, as I assume that -5.00 is rather high for a first prescription.

I stabilised at -5.00 many years ago and if anything think I may be slightly less now. I have fancied a stronger prescription and have tried wearing -6.50 and -7.00 but just can't accommodate and get on with them.


Likelenses 12 Jan 2013, 21:56

anne

Minus 5 is a nice prescription. How high would you like it to get?


anne 12 Jan 2013, 13:06

i wear glasses and lenses all the time now for about 4 years. my eyes are healthy but shortsighted -5.00. i cant go with out wearing glasses. ive tried not to wear them at home but i just walk into things. is it every time get new lenses eyes get weaker?


Aubrac 10 Jan 2013, 09:14

Hello everyone and Happy New Year.

Good to be back on Eyescene after an absence of quite a while.

Just to update for any members not having seen my previous posts, I am a lens wear with a boring -5 +2 add in both eyes that has not changed in over 12 years. However I am a great GWG fan!

About six years ago I went to the 20/20 Optical Store in London for my regular checkup. I suggested to my wife we spend the day in London and she might also like an eye test. I knew didn't have great distance vision and also struggled to read signs and small print.

Well I came out from my test and there she was looking at frames. So, heart pounding I asked what they said,'Oh just to choose some frames for my prescription'. We spent a very enjoyable afternoon in nearly every optical store along Oxford Street looking at frames but didn't find anything quite right (if truth be told I wanted to prolong the shop visits and watch her trying on more frames)

Anyway we ended up a few days later in a local store and settled on a rimless Silhouette frame with her modest R +50 -50 35 L +0.75 -75 130 lenses. She wore these off and on and six months later said she couldn't see well with them. Change of prescription to R +1.00 L +1.25 and the same cylinder. Another year and a change to R +1.25 L +1.50 and about 18 months later a change to R +1.50 L +1.75 same cylinder and 4 degrees base out prism in each eye, and a change of frames to red and black frames.

She was a 60% wearer although when on holiday or away from home she was usually FT. She always kept her glasses in her bag or pocket and they became more and more scratched and she was also really overdue for a check up. She had also taken to keeping a +3 magnifying glass in her bag which she unashamedly used in restaurants or shops to read labels and menus.

I should mention that I made the mistake of being a bit heavy about wearing glasses all the time and this generated some resistance and mistrust about my motives, also after a few too many glasses (the alcoholic kind)I said how much glasses turned me on - whoa, big mistake. Which meant that talking about eyesight became a taboo subject.

When she was young, I saw photos of her wearing about +4 glasses from about age 7 to 11 year old but I think by early teens she had stopped wearing them.

Well, to the latest development about three months ago, she was wearing her old rimless glasses which I thought strange because of their weaker prescription. But this was now full time from first thing on getting up to going to bed. Only a few weeks ago she went out to the local shop bare-eyed and I had a chance to look at the glasses. I would say they were about +2 maybe a tad more and varifocal with an add of about +2 which I had suspected when she started looking very much through the lower part of the lens at books and sometimes even when watching TV.

How mean to deny me the pleasure of a visit to the opticians with her and even possibly choose some new frames!

The other thing is that she went to visit her parents in the Ukraine a couple of months ago and brought back with her what looked very much like the glasses she had as a kid. I did get a close look at these and would definitely say about +4/+4.5

Now I sometimes see her looking at a small computer screen or phone with both her glasses and her kid's glasses over the top which would give her a pretty hefty prescription of at least +7 to maybe +10 for small print especially as she is only 44 years old.

I think another visit to the opticians is in order to maybe beef up the prescription although I don't know if there is a limit to an add - is +2.00 add +7.00 possible?

Sorry for the very long post but it has been quite a long six year road from early glass wearing days to where we are now and I'll keep you informed of any developments.

Thanks for listening.


Cactus jack 09 Jan 2013, 11:15

astigmaphile,

I NEVER have any "ordinary" medical problems. Mine seem to be "off-the-wall and rare. It took several office visits and my efforts to discover a way to induce the problem in his office so he could see it.

I did meet a gentleman who had something similar happen to his crystalline lenses except they "crystallized" into much smaller pieces. He said it was like looking through a shattered windshield and the glare from bright lights made vision almost impossible.

Try not to wait too long for the other surgery. Used to, they delayed cataract surgery until they got "ripe" because the had to remove both the lens and the capsule and there was a possibility that the patient would die before there was just no other choice. Today's vastly better technique is to emulsify the lens and suck it out, leaving the capsule mostly intact. The longer you wait, the harder your crystalline lens gets and the harder it is to emulsify. A friend waited too long and his cataract surgeries took about a half hour for the surgeon to emulsify and remove the lenses instead of the minute or two to remove mine. The whole procedure for me was about about 10-15 minutes, I think. I am not sure of the exact time because they had given me a happy pill. However, I was awake for the surgery and the doctor, at my request, gave me a running narrative of what he was doing while I had a front row seat from the inside.

C.


astigmaphile 09 Jan 2013, 09:22

Cactus Jack,

The biggest reason I am putting it off is money. Right now I am facing a big vet bill for one of my cats. The left eye also had monocular diplopia, too. That is how I knew 2 years ago that a cataract was developing in my right eye.

Your caracts must have been very unusual. I have never read of anything like it.


Cactus Jack 08 Jan 2013, 22:54

astigmaphile,

You may have a non-typical form of cataract. The typical form is a clouded, one piece crystalline lens.

I had a slight clouding of my lenses, but the main problem was that they were trying to break up into pieces, like gelatin dessert that has been left in the refrigerator too long or like the "islands" that form in the bottom of a dried up mud puddle.

It actually seemed to happen suddenly rather than gradually like a typical cataract. I was driving home after a day of using the computer and when I looked at one of the freeway signs, I saw 5 separate images, all pretty close together, something like the "FOCUS" Tee Shirt with several images. Scared the crap out of me. To make the problems even more scary, after a few hours at home relaxing, the problem disappeared. I naturally wondered if there was a way to "count my marbles" to see if any were missing. For the next several days, everything was fine and then it happened again.

I went to an ophthalmologist and he commented that I had a very small cataract, but otherwise he could see noting that might have caused it. He had prescribed prism for my strabismus and he was pretty sure the problem was my strabismus acting up.

A couple of more episodes and I had figured out that each eye was doing it separately and I could cause the problem by reading or using the computer for a long time, I made a deal with the Dr. to read in his office until it occurred and he would immediately check it out. That worked and when he looked into my eyes, he said something like you have monocular multi-opia. Your crystalline lenses are breaking up under accommodative stress because your ciliary muscles are still trying to focus your hardened crystalline lenses.

I said, OK, how do we fix it. He answered, same way as we fix ordinary cataracts. End of tale.

Another possibility for your situation is that the cataract may be causing the crystalline lens to change shape. Is there any reason you are waiting to have surgery on that eye?

C.


astigmaphile 08 Jan 2013, 19:54

Cactus Jack,

Thank you for the interesting info. Things have changed a lot since I worked for Surgidev. I was laid off in 1993. The ones we made were PMMA and were not flexible.

The monocular diplopia is in my right eye, the one with the cataract. My left one is 20/20 with 2.50D of cyl correction.


Cactus Jack 08 Jan 2013, 19:02

astigmaphile,

As I understand it, IOLs and implantable contact lenses are two different animals. The following about the IOLs I received was told to me by the eye surgeon.

IOLs physically replace the crystalline lens after it has been emulsified and removed from the lens capsule. The back membrane of the lens capsule is left intact to keep the vitreous humor and the aqueous humor from mixing. The IOL has two or three "feet" (probably the wrong name) that keep the IOL properly positioned until the back membrane of the lens capsule attaches itself to the IOL. Before it attaches itself to the IOL, it is easy (relative term) to change by cutting up the lens and removing it using very small tools through an incision similar to the one they made to install the lens. After the IOL and the capsule membrane fuse, it is substantially more involved.

An implantable contact lens actually goes between the iris and the cornea. Apparently, it does not get attached to anything and it can be removed by cutting it up and removing the pieces through a small incision.

My IOLs were installed through a 3 mm incision in the side of my cornea. The IOL is much larger than 3 mm, but it is apparently very flexible and can be rolled to fit into a very small diameter tube. The tube fits through the incision and the rolled up lens is injected into the eye, Your body heat causes the lens to resume its normal shape and it is fitted inside the capsule. I suspect a similar technique is used to install the implantable contact lens. The only difference is that the space between the iris and the cornea is larger so a different type of "feet" are used to hold it in position as long as the lens is in place.

Your double vision may be caused by the IOL not remaining in its proper place for some reason. Another possibility that your current prescriptions are substantially different between your two eyes and the image sizes on the retina are radically different. If that is the case, your eye muscle control system can't match the images well enough to fuse them.

You need to talk to your ECPs. If image size is a problem, you may be able to wear a sphere only contact lens on one of your eyes to partially match images sizes and then fine tune the resulting Rx with glasses, maybe with some prism.

Double vision is a miserable nuisance. I know.

C.


astigmaphile 08 Jan 2013, 18:32

Cactus Jack,

You have a very good point about changes in astigmatism after toric IOL implantation. That would also apply to implantable contact lenses.

In 2001 there may not have been toric IOLs. My surgery was 27 Jan 2011. Someday I will need to get the right eye done as everything is double even with my glasses. The left eye went cloudy in 14 months and the right one is still clear after 2 years.


Cactus Jack 08 Jan 2013, 11:06

astigmaphile,

I am not doing a very good job of keeping up with what is available these days. There is no reason why an IOL could not have some cylinder in it. Once in place, an IOL does not rotate so it would not have the problems that a toric contact lens does if it does not stay correctly oriented on the cornea.

I have a relatively small amount of astigmatism, but my cataract surgeon did not even mention the possibility of an IOL with cylinder when I had the surgery in 2001. Maybe they weren't available then. He mentioned multi-focals, but suggested I might not like them because they did not provide the absolutely sharpest vision I prefer. A few months after the cataract surgery, he did offer to make some "corneal relaxation incisions" (similar to Radial Keratotomy), but I declined. I needed my trifocals anyway and I liked the ability to easily fine tune my prescription in the glasses.

Astigmatism is not absolutely fixed. What does a person with toric IOLs do if their astigmatism changes?

C.


astigmaphile 08 Jan 2013, 10:36

This is an answer to Cactus Jack's post thatsaid cataract surgery does not correct astigmatism. Toric IOLs do correct it. I was offered one but chose to have a basic monofocal IOL because Medicare wouyld not pay for the fancy IOL. It doesn't bother me to wear glasses. I would have to at least wear readers as the IOL is fixed for distance only.


Specs4Me 08 Jan 2013, 09:24

Cactus, we of the ROT need to watch out for each other.


Cactus Jack 08 Jan 2013, 08:58

Thanks Specs4me,

I believe you may have missed my post of 07 Jan 2013, 10:32. I suggested wearing her previous glasses for reading and close work. They are 2.00 diopters weaker which would be like +2.00 reading glasses or a +2.00 ADD. It would probably work fine for reading, but it might be a little too much for working with the computer. +2.00 would focus at about 19 - 20 inches (50 cm) and her ciliary muscles and crystalline lenses could supplement that with little stress if needed to focus closer. The +2.00 might be little too much for the computer, but it depends on how close she likes the display.

Another way to reduce focusing stress is to use some clip-on magnifiers which are available from http://www.rx-safety.com for about US$15.00.

I use some +1.25s when I have a lot of work to do on the computer. Saves getting a crick in my neck using the intermediate segment of my trifocals for long periods.

At my age there is always the threat of an involuntary defrag (stoke) or maybe that would be a re-frag if there is such a thing. Every day, I thank my maker that I am still playing with pretty much a full deck, I think, but I am not sure I would know, if I was not. Thanks for checking up on my ramblings.

C.


Specs4Me 07 Jan 2013, 23:31

CJ & Toni,

CJ, correct me if I'm wrong (I'm not quite nipping at your heels but almost and my memory retreval system has become quit sluggish as well), but might it not be worthwhile for Tone to use and older weaker pair of glasses for those times she is doing lots of close work? Times such as extended reading/studying or computer work.

I believe I have read here, perhaps from you CJ, that doing that decreases the amount of extra plus that the eyes must provide for close work and that this may help slow down the myopic progression. If this is true, bifocals would certainly work as well but considering Toni's age I'm sure she would not be excited about wearing bifocals. That notwithstanding, perhaps the weaker glasses for use at home in the evenings, when the eyes are somewhat tired anyway, for doing close work might be of some help.

Toni, if CJ concurrs with this idea, he certainly knows loads more about this than I do, I would recommend that you discuss the idea with your ECP and let her help you make the final decision.

CJ is absolutely correct, do the research necessary to educate yourself so that as you work with your ECP over the next few years you will be able to participate knowledgably in the decision making process and thereby take the best care of your eye possible.

Keep up the good work in school, it will pay you back big time in the future.

PS to Cactus - I wouldn't recommend a defrag, could mess up the pointer table and thus be worse off!!!!!!!


Cactus Jack 07 Jan 2013, 22:26

toni,

Vision correction techniques are constantly under development and what is impossible today may be common in a few year. Some discoveries are accidental and some are the result of directed research. The important thing is to learn all you can about vision in general and your vision specifically. In a few years, you will be responsible for deciding what your vision care will be and there will be options that we can't even dream about now. Let me give you an example.

I am 75 years old when I was growing up, the development of cataracts, which is the clouding of the crystalline lenses, was the feared possibility in older people. It meant either blindness or a major surgery to remove the clouded lenses, months of recovery, and then very thick plus cataract glasses with prescriptions in the +20 range which were, in effect, like wearing binoculars with no peripheral vision. Some people who are severely hyperopic still have to wear glasses like that. During World War II, pilots flew airplanes with acrylic plastic windshields and canopies that we call plexiglass. Some of these pilots were involved in fighter actions where the windshields and canopies were shattered by bullets and tiny pieces of the plexiglass penetrated their eyes. In many cases their eyes healed and the could see normally, without realizing that there were actually pieces of plastic inside their eyeballs. A few years after the war, eye specialists began to discover that these pieces of plastic had been inside some eyeballs with no apparent ill effect. The doctors soon began to put two and two together and wondered why cataract clouded crystalline lenses could not be replaced with clear artificial lenses made of plastic and excellent vision restored,

To make this brief, that worked and with today's surgical techniques, clouded crystalline lenses are removed and replaced through a 3 mm incision in the side of the cornea in a 15 minute operation while the patient is awake, but mildly sedated. I developed cataracts about 11 years ago and I had the surgery. After the lens was replaced, the tiny incision closed without a stitch and the doctor put anti-biotic ointment in my eye and bandaged it. After about 30 minutes to recover form the mild anesthesia a friend drove me home. I was instructed to rest and sleep on my back that night. In the morning, I was to remove the bandage without rubbing my eyes, let my natural tears wash the anti-biotic ointment away. It too about an hour. When my vision cleared I could see quite well with the repaired eye without glasses. My mild myopia had be corrected by selecting the power of the implanted lens. I took the prescription lens out of my glasses, put on my glasses for the benefit of my other non-repaired eye and drove myself to the doctors office. He was pleased with the results and my question to him was - When can we do the other eye. He replied 2 weeks.

I had been very apprehensive (scared) about the surgery, but it was so easy and the recovery so quick, I would have said lets do it NOW, but he wanted to wait to make sure no complications had developed. Two weeks later, we did the other eye and I have never looked back.

I still have to wear glasses because it is very unusual to fully correct all refractive error. The Intra Ocular Lens (IOL) are only available in 0.50 increments and the surgery does not correct astigmatism. I can function quite well without glasses because we set the Rx for Distance in one eye and a slightly nearsighted Rx in the other called mono vision. I wear trifocals that provide 20/20 vision or better. The IOLs are single focus and there is no accommodation possible, but I had worn trifocals for many years before the surgery, so it was no big deal. Today, IOLs that are multi-focal lenses, but I don't think they offer the very sharpest vision. By the time you want to consider some form of refractive surgery, no telling what kinds of IOLs or internal "contact" lenses might be available. Maybe by the time you want to consider lens replacement, it may be possible to correct your myopia and install a variable focus IOL that works just like your natural crystalline lenses and your ciliary muscles can make it work like the lenses you were born with.

The only thing you need to wait for is for your vision to stabilize. Some surgeries are reversible (internal "contact" lenses can be changed), but others provide a fix that will last the rest of your life. Replacements for crystalline lenses are pretty hard to change with the current technology. Curiously, the IOLs I got actually have 6% better light transmission than my natural lenses. That means that bright sunny days are REALLY bright and sunny. Sunglasses are not absolutely necessary, but are very nice to have. My night and low light vision is excellent.

I would like to think that you have some exciting possibilities for vision correction in the future and some fascinating choices to make. Make them with knowledge and understanding.

C.


toni 07 Jan 2013, 20:14

Cactus Jack

One important thing that I forgot. She said that my eyes are going to be too nearsighted for lasik (i could reach the limit in 1 or 2 years) but that if I wanted I could probably get a lens implant after my eyes stop changing. I don't know how I feel about that -- it sounds scary and I might decide to just keep wearing glasses. It will be nice when I don't have to keep getting thicker ones.


Cactus Jack 07 Jan 2013, 19:36

toni,

Excellent work. Your Optometrist knows more about your situation than any of us ever can. At least, even considerable amounts of myopia can be corrected to provide 20/20 vision or nearly so. Also, new solutions and therapies are developed all the time. The only thing I would urge you to consider is that retinal detachment is an increasing risk as your prescription increases. Very high myopia is one risk, but their are others such as a blow to the head. Fortunately, most detachments can be satisfactorily repaired using a laser to "tack" it back in place.

C.


Cactus Jack 07 Jan 2013, 19:26

Honest Eba,

I believe the link offered by Curt is the one I had in mind. Thank you Curt.

C.


toni 07 Jan 2013, 18:10

Cactus Jack

I sent my optometrist an email and she wrote me back. She said I do have axial myopia and it's going to get worse. She said she thinks it's going to slow down but nobody knows for sure, and there could still be times when it spurts. Next time, I might need anywhere from -.50 to -2.00 more, no one can know, but what is known is that my glasses will keep getting more negative through my teens. She said if I'm lucky I might stabilize at -12 and if unlucky it could go as high as -20. Not something to look forward to but I won't go blind and that's reassuring.


Curt 07 Jan 2013, 13:27

Honest Eba: There are several articles out there that suggest that this is a growing trend in Asia:

http://www.bbc.co.uk/news/health-17942181


Honest Eba 07 Jan 2013, 12:59

Thanks for the information, Cactus Jack. But I did some searching on the net and could not find any references to that article. It sounds racially motivated to be honest, and if it a quote from a member here, it might just be someone's Asian fantasy designed to enhance their fetish desires. If the source is the Chinese government, you should keep in mind they are Communist and have their own untrustworthy heart we must deal with.

As a woman of mixed descent, I question the validity of tying traits to any particular race. If a black person came onto ES and said they heard that 80% of black people need glasses, would you automatically believe it? What if they said they read it in some black-focused publication? Would you start quoting it then without research? Or would you just make the percentage number lower?

My point is to be careful of sourcing. Regardless of who says what, there are just too many loaded biases here.


minus5wholuvsgwgs 07 Jan 2013, 12:07

Toni Yes its exasperating having to wear thick glasses but most people do not notice my own girl friend is minus 15/minus 16.25 like a number of people on this forum I find strong glasses attractive so please wear with pride .Of course genetics have caused this for whatever reason Chinese and other east Asian and Jewish people have a high prevalence of myopia so often high myopia goes hand in hand with high intelligence good luck


Cactus jack 07 Jan 2013, 10:32

toni,

Thanks. Your writing reflects your intelligence and academic achievements and I predict a very bright and exciting future for you. In the Genes department, you have a lot of things working against you. I am delighted to hear of your interests in Math and Science. Optics, Vision, and all the sciences often use Math to describe and predict cause, effect, and results. With access to the web and a good library, you can explore the concepts associated with your vision in whatever size "bites" you wish, whenever you want.

Lens thickness for a particular prescription is significantly affected by the Index of Refraction (IR) of the lens material. The lowest cost material these days is CR-39 with an IR of about 1.49. It also has excellent optical properties called "Abbe" values - meaning Chromatic Aberration characteristics. Unfortunately, lenses made of CR-39 will be thicker than lenses made of materials with higher IR. Unfortunately, high index lenses are also more expensive that CR-39 and in a situation where frequent prescription changes are occurring the extra cost may not be justified.

Another factor in lens thickness is that there are rules in the US that lenses have to be strong enough to pass certain tests. This sometimes results in minus lenses being thicker in the center to pass the tests and that results in the lens being thicker at the edges. Some materials are stronger than CR-39 with a higher Index, but a poorer Abbe. Polycarbonate comes to mind and it is only a little more expensive.

You might want to investigate some of the online retailers as a source of inexpensive glasses with high Index lenses. However, I would caution you that as a potentially active teen ager, the rules I mentioned above about lens strength do not always apply to glasses sold outside the US and the lenses may not be as physically strong as lenses made here.

Theoretically, you might be able to slow the rate of increase some by using older, weaker glasses for reading and close work, but there are no guarantees. Glasses with about 2 diopters less sphere would be like wearing reading glasses.

I doubt you have much Pseudo Myopia because the drops would have mostly eliminated that as a factor in your exam.

It really sounds like you have a beyond-your-age grasp on your situation and I congratulate you. Keep up the good work and let us know if we can help.

Honest Eba,

I posted that number from a possibly failing memory and I should have stated it as an opinion. The reference and memory came from an ES post a few years ago, by a person who lives in Asia or is of Asian descent, if I recall correctly. They referenced a news article from an Asian based publication that said that the Chinese government was very concerned about the very large percentage of middle and high school level students that were myopic. I seem to recall that in some classes, the percentage of students who wore glasses for myopia were even higher than the 70% I stated, something like 90% and I was uncomfortable with that number myself and reduced it to 70%.

At 75, my memory is pretty good, but my retrieval rates are not what they used to be. My memory probably needs de-fraging, but I am afraid to attempt it. I don't think I Hallucinate, but I don't think I would know if I did. Anyway, I apologize for not throughly researching my statement before making it. Thank you for your diligence.

Perhaps, some of our other members can help with a more accurate number or estimated number and a reference. The point I was trying to make for Toni was that there seemed to be more to genetic factors in myopia (and hyperopia) than just immediate family.

C.


Honest Eba 07 Jan 2013, 09:15

Cactus Jack can you please post a citation for that WA statistic? Where in the world did you read that 70% of the people in China wear minus lenses?? I am very intrigued to read this reference in it's entirety.

btw, if you don't have a reference, please clearly cite that it is your opinion only.


toni 07 Jan 2013, 06:54

Cactus Jack, to avoid giving the wrong impression, not everyone is that bad. The lenses in my glasses are thicker than many of the adults in my extended family.


toni 07 Jan 2013, 06:05

Hey Cactus Jack, you're a genius. Can you make my minus go back down? I'm just joking, I know my eyes aren't going to shorten, they're going to lengthen which will make me more nearsighted. I just want it to happen nice and slow.

Answers to your questions:

May I ask a couple of questions?

1. Did any of the above make any sense to you? I tried to write about some technical things in easy to understand language. Some of it. I'm an honors student but only in 8th grade.

2. Did any of it seem interesting and would you like to learn more? Yeah, but not too much at a time.

3. Did the examiner use drops for your last exam? Yes.

4. Do any of your parents, grandparents, or close relatives have myopia? All of them. I don't know all the prescriptions but my mom told me she has -13 and I think my dad is about the same.

5. Where do you live (country) and what is your racial background? America. 1/2 Chinese and 1/2 Jewish.

6. How do you like science and math in school? I get A's.


Cactus Jack 06 Jan 2013, 23:56

toni,

In question 5, ethnic background may be a better term than racial. I have no desire to do anything other than establish if your background is one that has a very high number of people with very significant myopia. For example, in China, about 70% of the population wear minus glasses and a large percentage of those wear prescriptions as strong as yours or more. If you lived in China, your glasses would probably be in the middle of the range of prescriptions.

C.


Cactus Jack 06 Jan 2013, 23:48

toni,

I may have some bad news. The changes are probably NOT finished. The rate of change you described leads one to think you have progressive myopia and probably should be seen by an Ophthalmologist who specialized in Progressive Myopia.

I know that is not what you wanted to hear, but you need to face facts and find out exactly what is going on. Unfortunately, we have no way to tell for sure, from here. There may be two things going on at the same time making your myopia increase rapidly. One is much less threatening than the other and there is something you may be able to do about the less threatening one and unfortunately not much you can do about the other. Let me explain.

There are actually two types of myopia, True or Axial Myopia and False or Pseudo Myopia. Both cause exactly the same vision problem, nearsightedness, but they do it in two different ways. True or Axial Myopia is reliably believed to have a strong genetic component and often it is inherited from your parents or sometimes it will skip a generation and the grandparents will be myopic. Sometimes Axial Myopia can be a racial characteristic such as evidenced by the prevalence of myopia in asian populations. Axial Myopia is caused by a mismatch between the plus optical power of the eye's lens system and the size or length of the eyeball. As part of the growing process, your eyes must grow also and if they grow too fast or too much, the eye's lens system may have too much plus power for the length and the light rays from distant (relative term) objects may focus before they reach the retina. When that happens, minus lenses are necessary to move the focus back a few mm to the retina. The actual distance is about 0.6 mm per diopter so if you need -9.50 glasses and you have no Pseudo Myopia, your eyeballs are about 5 mm longer than your eye's lens system can handle by itself. Occasionally, the eye's lens system will have too much plus for the length of the eye, but that is unusual. True or Axial Myopia is considered permanent because once the eye has grown, there is no known way to cause it to "shrink".

However, Pseudo Myopia is actually caused by a "temporary" condition of too much plus in the lens system. In this case, the culprit is the ciliary muscles and crystalline lenses in your eyes. The ciliary muscles and crystalline lenses are the "auto-focus" mechanism in your eyes that let you focus close for reading or using the computer. You DO have some control over them and under certain circumstances, THEY can cause Pseudo Myopia which is NOT permanent, but it can be a rip-roaring nuisance.

The way the eye is supposed to work is that for distance, the crystalline lens is fully relaxed at its MINIMUM plus power. Even relaxed, its plus power is considerable, perhaps as much as +15 diopters or more. In an eyeball with uncorrected 20/20 or 6/6 vision (depending on if you use English or Metric units), the total plus power of the eye's lens system is +40 or more for distance. When you read at a typical 16 inches or 40 cm, the laws of optical physics, which you probably have not studied yet, say that you need +2.50 more optical power to focus at that distance. It is the job of the ciliary muscles and crystalline lenses to provide that additional plus power. At your age, you can effortlessly focus a lot closer and your ciliary muscles and crystalline lenses respond to your efforts easily. However, there is a snag here. If you do a lot of reading or focusing close for a long time, the ciliary muscles can kind of get stuck providing the extra plus and fail to relax properly for distance. The extra plus keeps you from seeing clearly in the distance and you have Temporary Pseudo Myopia. How long is temporary, it depends on the situation and the individual. While the Pseudo Myopia is present, you are really more myopic and if you happened to get a school test or an eye exam when it is present, bingo, you need stronger glasses. At your age, when you get them, your eyes easily adjust to the stronger lenses and after a while, the increase becomes your actual new prescription.

An Eye Care Professional (ECP) has ways of separating Axial and Pseudo Myopia. Often the separation is done with what is called a dilated or wet exam. For that type of exam, drops are put in your eyes that after 20 minutes or so make your ciliary muscles relax and your pupils open fully like you were in a dark room. This pretty much eliminates the Pseudo Myopia and only the True or Axial Myopia remains.

May I ask a couple of questions?

1. Did any of the above make any sense to you? I tried to write about some technical things in easy to understand language.

2. Did any of it seem interesting and would you like to learn more?

3. Did the examiner use drops for your last exam?

4. Do any of your parents, grandparents, or close relatives have myopia?

5. Where do you live (country) and what is your racial background?

6. How do you like science and math in school?

I hope I did not scare you. Progressive Myopia is not considered curable at this time, but it is manageable like many other medical conditions. We may not like the facts, but at least we can work with them. It is impossible to work with myths, lies, or false remedies.

C.


toni 06 Jan 2013, 21:47

How fast can a person's eyes change? I can't believe how fast mine did. Just before school started this year, I had an exam and got MUCH stronger glasses, -7.50. When I went back to school from winter break last week I got sent to the school nurse for a screening. So she wrote a note to my parents that I needed new glasses. So I had another exam today and the dr said my glasses were WAY too weak and wrote -9.50 on my form. How can this be? Are the changes finished for now? Btw I'm a 14 year old girl. So what's up with my eyes?


A. P. 24 Dec 2012, 12:19

I collected my new glasses this morning. Wow, you folks were right! I suppose they might take a couple of days to become totally accustomed to, but already my vision is noticeably so much better. Looks to me like joining the "club" is going to be a pleasure........

Thanks to you Cactus Jack, EyeTri and john!


john 14 Dec 2012, 13:30

A.P. You are gonna love your new trifocals and wish you got them 5 years ago


A. P. 12 Dec 2012, 07:31

Eye Tri,

Thank you. I hope you're right. Maybe this new "club" I'm joining will turn out to be a good thing, rather than something to worry about.

A. P.


EyeTri 12 Dec 2012, 05:38

A.P.

My very first glasses were bifocals, and I got them at age 31. At age 43 I got my first trifocals. I tried progressive lenses, but when the add part of my prescription passed +2.00 they were functionally inferior. I am now 70, and only wear trifocals.

I think you will like your new glases. Be sure to let us know.


A. P. 12 Dec 2012, 05:32

Cactus,

Thanks for your encouragement. I guess I'll find out about the improved vision in about ten days when my new glasses are ready.

A.P.


Cactus Jack 11 Dec 2012, 22:37

A. P.,

Having worn bifocals since I was 21 and trifocals since my late 30s (now 75), I think you will wonder why you waited so long. I think you made a very good choice. I still remember how neat it was to be able to see the instruments on the dash clearly, driving home.

C.


A. P. 11 Dec 2012, 18:33

old RX: (five years ago):

OD +2.00 -.50 x15

OS +3.50 -1.00 x110

add +2.00 (ft 28 bifocals)

new RX: yesterday

OD +2.50 -.50 x10

OS +4.00 -1.00 x105

add +2.25 (ft 28 trifocals)!

Uh oh! Any trifocal wearers out there who'd care to share advice or experiences with this soon-to-be new member of the club?


Melyssa 09 Dec 2012, 09:55

Laura,

I'm from the Philly area as well (born in the city), and if you want inexpensive glasses, there are three sites (sights?) of Glasses Galore in Bucks County. They have lots of frames and do quality work.


Bob 09 Dec 2012, 00:02

Laura,

This might not be a helpful suggestion I you have to limit costs, but in the Philly area there is a glasses shop called Modern Eye...they have a couple locations (center city and university city)...and they have GREAT glasses. Just outstanding styles and quality. It's worth checking out. Not cheap, but really excellent.


Soundmanpt 08 Dec 2012, 14:38

Laura

Your mom is correct that high index, which is thinner lenses, is much more expensive at the optical stores. Maybe you should have your mom and you take a look at getting your glasses on line. It is much, much cheaper and the quality is really very good. In fact I know of many opticians that now get their own glasses on line even though they generally get a free pair every year from where they work. They like the option of having extra pairs to choose from and they can get rx sunglasses as well.

The one that I highly recommend as well as Cactus Jack and Crystal Veil is Zenni Optical. The site is "zennioptical.com" You should be able to pick out some really nice glasses with the AR coating (anti-reflective) and the high index lenses for around $50.00.

If you or mom needs any help in ordering just ask inhere as there are many of us that can help you.


Laura 08 Dec 2012, 11:37

Hi Cactus,

My mom wears glasses all the time and my dad sometimes and my brother, he’s10, sometimes. I asked my mom. She says hers are -4 and my dad’s are -1 and my bros are -2 and getting worse. She says my dead grandma had thick glasses. I live in the Philly area. Does that help?

We went to the eyeglass store this morning to pick frames and order the glasses. The sales girl took my file out and looked at it and the new form and then at me. Then she said, did my dr say anything about my new perscription. I said, not really. So she said to me, it looks like your eyes changed a lot. He perscribed you much thicker glasses. Maybe we should put you in a higher index. My mom said no, it's too expensive when her glasses change so often. So in a week I'll see how bad it is. I'm a little worried.


Cactus Jack 07 Dec 2012, 10:57

Laura,

Lets see if we can help you understand what those numbers mean. It really is not hard. OD is an abbreviation for Oculus Dexter, latin for Right Eye. OS is an abbreviation for Oculus Sinister, latin for Left Eye.

The first number in the prescription is the lens power needed for distance "sphere" correction, in your latest prescription -8.00 in your Right Eye and -7.50 in your left. I'll explain more about "sphere" correction in a moment. The second number in your prescription is the "cylinder" power needed to correct your astigmatism - more about that in a moment also. The third number is the axis or direction of the cylinder correction. Both the second and the third number are required to define the cylinder correction.

Now lets talk about what it all means. The fact that you need minus (-) correction for sphere, the first number, means that you are near or short sighted, the medical term is myopic or myopia. Myopia is very common in young people your age, but yours is a bit higher than most - more about that in a moment. Myopia is caused by a mismatch between the power of your eye's internal lens system and the length or size of your eyeball. In your case, your eyes have grown (as you have grown), but a little bit more than they really needed to, which has made you myopic. The actual amount is small, but in this case, a little goes a long way.

Astigmatism, corrected by cylinder (with an axis), is usually caused by uneven curvature of the front of your cornea (the clear part of your eye). Ideally, it should be a smooth, even curve, but sometimes it is curved more in one direction than it is in another. The actual cause is unknown, but again the amount of difference in curvature is very small, but again, a little goes a long way. Unlike myopia which primarily affects your distance vision, astigmatism affects how clearly you see at all distances. Also, astigmatism can affect your ability to see clearly and wear contact lenses.

Now lets talk about your specific situation. It appears that you have progressive myopia that is increasing at a rapid pace. In 7 months, your sphere prescription has increased by about -1.50 diopters or a bit over -2.00 diopters per year. Generally, that rate of increase has a genetic basis. Are either of your parents or grand parents also near sighted (need minus glasses)?

High myopia can be corrected with glasses or contact lenses, but extremely high myopia is also associated with higher risk of retinal detachment and other very serious eye problems. I do not want to cause you too much concern, but I suggest that you should see an ophthalmologist who specializes in high myopia to find out what is going on and what can be done to minimize future problems.

One thing to remember, it that there is nothing you could have done to

cause your nearsightedness. It may be possible to control or minimize the increase to some extent, but it will require expert help.

I have tried to simplify this explanation for you, but I urge you to learn as much as possible about vision and vision correction. Ultimately, you will need to understand and manage your situation as you become an adult. The more you know, the better job you can do. It is in your long term best interest.

We wish you the best. If you have more questions, please ask.

May I ask where you live?

C.


Cactus Jack 07 Dec 2012, 10:05

ConcernedMama,

I am glad that we have been of some help and that your daughter is under the care of some of the best eye specialists in the world.

Hopefully, Moorfields will also see your son, but they may not have much additional to offer, if the process is genetic, other than what your ophthalmologist is attempting with the bifocal add.

I suspect the reason you son is not making much use of the bifocals is that the add is actually very low and he probably does not notice much difference between the distance part of his prescription and the reading part. At least not enough that a 6 year old would notice it. It is possible that either your ophthalmologist or Moorfields will increase the add somewhat so he will find it more useful when reading, if they think it might help. At his age, his crystalline lenses (and his accommodation) likely have exceptional range and he can effortlessly focus close to read at distances you and I would consider very uncomfortable, even with his glasses. He may notice that text appears slightly larger with the +1.00 add, but again, that may be beyond his comprehension at this time.

I would not worry too much about his not making much use of the bifocals and it may actually be counter productive to say much about it. Even at 6, boys are inclined to do the opposite of what their parents want them to - that is also hard wired in their genes. Of course, girls NEVER do the opposite of what their parents want, do they? At least not at 4.

We hope for the very best for your children and your family. It is hard to do better for them than you are doing. Please stay in touch.

C.


Laura 07 Dec 2012, 08:08

What do the numbers on my glasses perscription mean? I got glasses in 2nd grade because i couldn't see the board. Now I'm in 8th grade. So I was having trouble again seeing the board so my mom took me for an eye test. I didn't do too good and I got a new perscription. When we got home I was curious and I asked my mom to show it to me. She gave me my old and new ones. I think the new one is thicker but I'm not sure. I never saw a glasses perscription before and I realized I don't know what the numbers mean. Some numbers look higher and some look lower. Could someone explain what all that stuff means?

old (may 2012) OD -6.50 -1.50 75 OS -5.75 -1.75 110

new (yesterday) OD -8.00 -1.00 85 OS -7.50 -1.50 105


ConcernedMama 07 Dec 2012, 02:26

Cactus Jack - well the last few weeks have shown that you definitely know what you're talking about! Thank you so much for your advice - I felt so much more confident about asking questions and making sure that I understood everything that they said. Thank you.

We've seen the low vision team who were lovely and are coming back next week with some bits and pieces to help my daughter. She thought the whole thing was great fun and seemed to think that she was playing rather than being assessed!

We also went to Moorfields on Wednesday and although it was a very long day it was also really, really useful. They gave all sorts of useful tips and are going to see her every three months for now. Unfortunately her sight has worsened again but they are going to make her some new glasses that they think will give her better vision. We're going back next week to pick them up and for an evaluation under anaesthetic. It was a very useful appointment but quite difficult as they gave me so much information and they weren't very positive about the prognosis.

They've also said that they'd accept a referral for my son but I have to contact his ophthalmologist to get him to write to them. We're having real problems getting him to use the bifocal part of his glasses so hopefully they could give us some tips. Do you have any tips?

Thank you so much.


Cactus Jack 20 Nov 2012, 11:42

Concerned Mama,

Your son's prescription is quite strong for his age, but I doubt reading played much of a role in its rate of increase. Reading, if he did a lot of it, could have been a tiny factor, but genetics is probably the driving force. Be sure and mention your family history of myopia to your ECPs.

Reading is a major source of learning and I would suggest that you do not want to discourage it. Fortunately, it is very easy to minimize the accommodation stress using either bifocals or prescription reading glasses.

His prescription is too strong for it to be useful to try to read or do close work by taking off his glasses. Glasses or contacts neutralize or cancel out refractive errors. In his case, his eyes have approximately +5 diopters more optical power than he needs. Ignoring the astigmatism, his eyes focus at about 7 inches or 18 cm which is too close for normal reading. The way this works optically, is that his glasses provide good correction for distance vision (6 meters or more). With his glasses, which effectively make is prescription 0.00, focusing for reading at say 40 cm or 16 inches, requires +2.50 diopters from somewhere, Fortunately, other than being nearsighted, his eyes have developed normally, and he can easily supply that +2.50 using the "auto-focus" (ciliary muscles and crystalline lenses) mechanism in his eyes to read or focus easily at almost any distance closer than 6 meters. The +1.00 Add supplies some of the +2.50 so he only has to supply +1.50 reducing the accommodative effort and hopefully slowing his myopia.

C.


Soundmanpt 20 Nov 2012, 11:20

Sandy

Well considering you were prescribed glasses some 20 years ago I think you have done very well avoiding the need for them. But I think you will soon find wearing your new glasses very relaxing to your eyes when your grading papers and other close work. It may take your eyes a little while to adjust to your glasses but I think within a few days they should feel very comfortable and you will love your improved vision. Your glasses should make seeing at all distances much better. In the 3 weeks you have before your due to renew your drivers license you may find that your vision is so much better that you won't even bother taking them off for the vision test at the DMV

Just curious what prompted you after 20 years to get your eyes tested? You have enough astigmatism that I would think you have been getting headaches quite often and your eyes should feel quite tired as the day wears on.

I would think the optician may recommend that you not wear them when your driving home after you pick them up. But as soon as you get home you should wear them the rest of the evening for watching TV or grading papers etc. In the morning if you feel that your vision is good with your glasses then wear them to drive to school, but if things are still not in focus then wait until you get to school and put them on when you get there. Wear them the rest of the day and by the time your ready to go home your eyes should be able to see very well with your glasses.

Do let us know how it goes when you pick them up and how much they help.

Congratulations on becoming a GWG.


Sandy 20 Nov 2012, 08:43

Thanks for the responses. I live in Indiana, and I was perscribed glasses in high school but never wore them. This was my first eye test in probably 20yrs. I am a sixth grade teacher. I'll be picking up my glasses this afternoon.


ConcernedMama 20 Nov 2012, 06:47

Wow - thank you so much to you both for all your help! I am so grateful for you both taking the time to reply.

Your information is really helpful - I've just had a look at the RNIB page and there's all sort of interesting information on there. I'll post on the forum later - there's another post from a mother of a girl with progressive myopia so I'll reply to that too!

I feel a bit bad that I've played down my son's problems now - I think that I will ask for him to be referred. He has learnt to read in the last year and I do worry now that this could be why his sight has got worse. I suppose that I sort of take it not as seriously because his sight is so good with ,new glasses whereas my daughter can't see very well even with her strong lenses.

I have this morning received a letter from Moorfields with an appointment for December - they said that it will take most of a day so I imagine that it's going to be quite an in depth investigation. I will keep you updated. I think that following your advice I will ask about my son as well.

Would you say that my son is quite nearsighted for his age then? The thing that worries me is that both his father and I are nearsighted but I didn't get glasses until I was eight or nine and my husband was eleven, he thinks. To be honest, before you asked I didn't even know his prescription and I only know my own because it's written on my contact lens packets!

My contact lenses are -9.00 for both and my husband's are -7.50. My father was apparently very nearsighted but died when I was young. My mother thinks that is why I had bad eyes. She said that even with glasses he wasn't able to drive, but I don't know his prescription. My husband's great grandmother was apparently blind, but I don't think that anyone else on his side has vision problems.

Thank you so much for your help. You are really wonderful people!


John1971 20 Nov 2012, 01:23

Concerned Mama

www.rnib.org.uk is the website for the best charity in the UK for people with partially sight, blindness and also vision problems.

Their web site has lots of information about the eye conditions that your daughter has.

They also have a telephone helpline; it might be worth phoning them and speaking to someone. They offer an advice line and also counselling service which many people find uselful. The phone number is listed on their website.

They also have a discussion forum,one of the sections is called "parents place" and there will be people in a similar position to you.

I have Retinopathybof Prematurity and I had similar strength glasses to your daughter.

Good luck


Soundmanpt 19 Nov 2012, 22:15

Sandy

You didn't say if you have glasses with that new prescription or not, but I would suggest that you at least have a pair with you. When they ask you if you wear glasses I would just tell them the truth and you can even say there for close up and you think you can pass the test without them. It can't hurt to try. Remember you don't have to be able to see 20/20 only 20/40 and they will only ask you to see the 20/40 things. If you can't do it then you don't have any choice but to put on the glasses and be required to wear them when you drive. Really even if you pass the test without them it might still be a good idea to wear them when you drive just to be a bit safer.


Cactus Jack 19 Nov 2012, 21:31

Sandy,

It depends on where you live and the driver's license rules there. I suspect your distance vision is probably quite good, but your astigmatism probably makes reading small signs at a distance or reading small text close up, a problem.

You need to be aware that being a little hyperopic generally causes presbyopia be become a problem a bit earlier than the mythical age of 40.

May I ask your occupation?

Also, do you have any form of vision correction?

C.


Cactus Jack 19 Nov 2012, 21:22

Concerned Mama,

It appears that your son's Rx has been increasing at over -1.00 diopters per year. I am guessing that he has or will very soon start school and he will be reading soon if he is not already. I suspect his myopia is genetic in origin. Hopefully, the +1.00 Add will help reduce the stress of accommodation when he reads or focuses close, but a bit higher Add might be of more benefit. Another option for reading would be to wear his previous glasses if you still have them and they still fit his face. His previous Rx was almost exactly -1.00 diopter less than his current one. The small difference in his left eye is not very significant for the purpose of reducing the focus effort required to read or use a computer. You might want to review this idea with your Eye Care Professional (ECP)

You might ask if Moorfields could also have a look at your son's situation. There seems to have been a little research progress in slowing progressive myopia using some eye drops, but the report I read was somewhat inconclusive. The results appeared to be slightly better than the placebo, but only by a little bit. In progressive myopia every little bit helps. At the rate your son's myopia is increasing, his Rx by the time he reaches his teens could be in the double digits and by the time it stops progressing in his 20s, it could be close to -20. Fortunately, it appears that his corrected visual acuity is excellent which tends to indicate healthy retinas. It is very likely that his corrected vision will remain excellent even into the double digits, but he should learn as much as possible about it as early as possible and stay abreast of developments in the field. Ultimately, his vision care will be his responsibility.

Your daughters situation was probably caused by a combination of genetics, her premature birth, and perhaps some fetal development problems. There can be a lot of things that cause premature birth and sometimes some of the effort to assure survival and ultimate thriving of a premie can affect their vision. Modern premie care is much superior to that which was available just a few years ago. Often, the doctors had no choice but to use excess oxygen to keep them alive and that often caused severe damage to the developing retina. Often resulting in complete loss of sight. I have an acquaintance whose mid 20 year old grandson was born prematurely. They had no choice but to use oxygen to keep him alive, but it apparently left him without any sight. Fortunately, he had been able to attend some excellent schools for young people with low vision or blindness and he has developed into an incredibly talented musician.

Hopefully, the doctors at Moorfields can offer the best treatment in the world for your daughter. At her age it is very important that she have the best vision possible to assure proper brain development You are doing the very best for your children that you can. I urge you to get as familiar as you can with vision and how it works. His is a link that you might find informative. It primarily describes normal eye development.

http://www.lhup.edu/~dsimanek/scenario/labman3/eye.htm

As always, your ECPs are much more knowledgeable than any of us, but please don't hesitate to ask if you think we can help you understand any of this, One other thing, you or your husband should not in any way feel guilty or responsible for any of this. There is no way you could have exercised any control over any of this. You and your husband may be myopic, but something like this could have happened to parents with perfect eyesight. Many genetic vision factors are famous for skipping generations and some congenital vision problems are caused by illness during pregnancy. For example, Something as generally mild as Rubella or "German Measles" is famous for causing serious eye development problems. Typically, if it occurs at the wrong time during pregnancy, it causes the child to be VERY farsighted because some of the eye's lenses did not develop properly.

May I ask your Rx and your husband's? Also, do you know if any of your or your husband's parents or grandparents were nearsighted?

C.


sandy 19 Nov 2012, 19:14

I'm 35yrs old and was recently given an rx of R+1.25 -1.50 84 L+1.25 -1.50 93. I need to renew my license in 3 weeks. Will I be able to pass the eye exam? Or will I have a restriction on my license?


ConcernedMama 19 Nov 2012, 09:27

Thank you again! You are fantastic at explaining things. Our paediatric ophthalmologist is obviously a good doctor but he doesn't really explain things. I think that next time I'll take someone with me and push for some proper answers.

It's Moorfields that we've been referred to! Our ophthalmologist said that they should be able to give some idea of what the future holds. We're very lucky to live in the south of England so it isn't too far from us - only an hour and a half on the train.

My son's prescription is (and again, I don't actually know what all the number really mean, I've never asked. I feel like a bad mother for not being more pushy and demanding an explanation)

OD: -5.25 -1.00 x160 ADD+1.00

OS: -5.50 -0.75 x010 ADD+1.00

and his last prescription was about nine months ago (he normally sees the ophthalmologist once a year but saw him three months early this time as he was squinting a lot and seemed to be having trouble seeing). It was

OD: -4.25 -1.00 x160

OS: -4.25 -0.75 x010

He has an appointment to see them again next August, which will be nine months. He has his new glasses though and seems to be seeing great so I hope that he won't need another change next time.

My daughter is a bit trickier. She is seen every three months as her sight seems to be deteriorating quite quickly. Her prescription is

OD: -18.75 -0.50x180

OS: -19.50 -0.50x45

and her last prescription, three months ago (give or take a week or so!) was:

OD: -18.00 -0.50x180

OS: -18.50 -0.50x45

The problem we have is making sure she can see well. It takes about two weeks to get her new lenses and then, three months later she needs another change. Her sight is really not good - it's 6/30 which I don't think is very good because her brother's is 6/6. She was supposed to be referred to the low vision team a while ago but nothing ever happened but when I said this last week our doctor wasn't very happy and we now have an appointment for next week! They are coming to our home to assess her and hopefully give us some tips.

Thank you for your help - any suggestions or explanations are so gratefully received!


Cactus Jack 19 Nov 2012, 01:32

Concerned Mama,

Rx is the abbreviation used for a prescription for both glasses and for the medicines you might need to get at a pharmacy. (I believe they are called chemists in the U.K.) It is often helpful to have the current glasses prescription (Rx) and a previous one with the time interval, if it is available, to help understand what is going on.

I suspect the surgery they are talking about involves re-attaching the retina by using a special laser to tack the retina back into its proper position. They may also be planning on some reinforcement to the membrane at the back of the eye socket to try to keep the eyeball from rupturing it. I am really not familiar with all the techniques or exactly what has and is occurring with your daughters eyes. I will try to do a little research on extreme pediatric myopia and if I find what appears to be a good explanation in plain English, I will let you know. Also, do not be afraid to ask the doctors for a plain English explanation with sketches or pictures, if you don't understand what they are saying. Most of them can speak plain English if they have to, though they may prefer using "professional" language.

By the way, you have one of the best eye hospitals in the world at Moorfields Eye Hospital in London. People with severe vision problems travel there from all over the world.

C.


Soundmanpt 18 Nov 2012, 21:22

eye test today

Sorry I for got to answer your other question but Andrew did a good job explaining it. You may want to ask the optician how long you have to decide about getting fitted for contacts if you decide to go in that direction? In other words you may want to first get your glasses and see how much you think you will be wearing them before you decide to go with contacts. Most optical shops allow you anywhere from 60 days to up to 180 days depending what the store policy is. Meaning you would only have to pay the additional cost for a fitting fee for contacts which will include a trial pair to see how they work for you. I would NOT jump right into contacts right away as it would be best to let your eyes get more relaxed first with your new prescription and that way if there has been a slight change your contacts will be more accurate. When you pickup your glasses you can ask about that. By the way the fitting fee should be about the same as what you paid for your eye exam.

It kinda sounds like your not up to the idea of wearing glasses very much? You must realize that wearing contacts doesn't mean you won't still need your glasses. Remember wearing contacts is really the same as wearing glasses full time meaning that when you take off your contacts you will need to wear correction except for close things.


eye test today 18 Nov 2012, 14:51

thanks for explaining that andrew, so that means my eyesight is better than normal then-obv with the lenses not without!, im guessing that the optician i had is in the minority to push their patient to read the really small letters,


Andrew 18 Nov 2012, 14:39

Standard vision is 6/6; 6/4.5 means that you can read at 6 metres the same things that people with 6/6 vision can only read at 4.5 metres (i.e. 1.5 metres closer). However, the -1 and the -2 meant that you got that number of letters wrong on the 6/4.5 line. Presumabaly, you got everything right on the next smallest line, which is why you were pushed to read the smallest letters.

A couple of years ago, my prescrption went down as the man who performed the eye test was satisfied if I could read the 6 / 7.5 line. I was not best pleased, but got the new glasses anyway, as I knew I needed varifocals, and went back a year later, saw someone else, who did correct me to 6/6, and came out with an Rx closer to where it had been two years earlier.


ConcernedMama 18 Nov 2012, 14:30

Hi Cactus Jack,

Thank you so, so much for your reply. It was really helpful.

I'm sorry if I didn't post in the right place!

We live in the UK and were referred to a paediatric ophthalmologist when my daughter left the hospital after being in there for quite a while after she was born. My son had already been wearing glasses but had previously been examined by an optician in a glasses store. He's now seeing the same ophthalmologist as his sister, but his sister's been referred to a specialist. We're waiting to receive an appointment.

Two questions! What does Rx mean? You mentioned that I did not post my son's Rx.

Also, do you know what sort of surgery they could be talking about for my daughter? He said that it would fix her retinas which aren't in very good shape and hopefully stop her nearsightedness from progressing. Her sight is only at 6/30 even with her new lenses and I don't want it to get any worse.

Thank you so much


 18 Nov 2012, 14:19

hi soundmanpt, yes I chose some glasses today and will pick them up in about 1 weeks time. i must admit I probaly will end up wearing them more as the optician took me out into the shop floor put those awful looking plastic frames on with al the lenses they put in and asked me to look around the shop with them,things were very crisp! I think the optician realised that I wasnt too thrilled by her suggestion of fulltime wear and she said i could book you in for a contact lens assessment-to which i agreed, howver wondering what is involved in this assessment?

so is the 6/4.5 thing on my aided visual acuity good?


Soundmanpt 18 Nov 2012, 14:03

eye test today

Well since you must have just got your eye exam done today i'm pretty sure you don't have your new glasses yet? If you read posts from others in here you will find there is much debate as to at what prescription it becomes necessary to wear your glasses full time. My personal feeling is that I agree with your doctor. That said no one can make you wear them more or less than you desire. The only thing that you must wear them for to be safe is when your driving. I think after you get your glasses and wear them you may decide that it is far better to be able to see clear and sharp then seeing things as a blur. With your new prescription I would recommend wearing them full time for about a week and then if you feel you don't need them that much you can be selective as to when you wear them.

Did you pick out new glasses and order them?


eye test today 18 Nov 2012, 13:50

hi all i had an eye test today after not going for one for 5 years, i am 25 years old now, i went for an eye test becayse i have noticed for quite some time now at night time i cant see much out of my current glasses and been doing a lot of night time driving. my old prescription is -1.25 in each eye with -.25 astigmatism, i have now been given -2.50 and -1.75 and -.25 astigmastim in the other eye, i was also told if i wear glasses my visual acuity aided is 6/4.5-1 and 6/4.5-2 what does this mean? I remember the optician was pushing me to read really really small letters, i kept saying i could barely see them but she was pushing and pushing, do opticians normally get you to read the really really small letters as i cant ever remember having to focus so hard during an eyeteset before, i felt like saying please just give me a break!! also she said i really shouldnt be just wearing my glasses for driving and tv like i do now but all the time, she seemed pretty horrified that I walk around in a slight blur most of the time, should i be wearing them all the time now?


Cactus Jack 18 Nov 2012, 11:33

Concerned Mama,

It sounds like you are trying to seek the very best medical advice you can for your son and daughter. Unfortunately, we can only offer non-professional opinions and suggestions. Perhaps we can give you some understanding of what appears to be going on, in more understandable layman's terms.

Nearsightedness and Farsightedness are caused by a mismatch between the total plus power of the eye's lens system (4 lenses) and the size or length of the eyeball. Most babies are born somewhat farsighted because their eyeballs must be small because their heads are very small compared to an adult head. If the eyeball is too small (too short) for the power of the lens system, the eye is farsighted. If it is too long or the lens system is too strong (has too much plus power for the length), the eye is nearsighted. Fortunately, most babies have the ability to internally correct the farsightedness by using their "auto-focusing" system, but it usually takes about a month for them to learn how to use it.

As the child grows and the head grows, the eyeball can also grow larger and longer. It is believed, but not proven - though there is strong evidence - that there is a genetically controlled process that regulates the amount of growth based on how much effort it takes for the ciliary muscles and crystalline lenses (the auto-focus part of the eye's lens system) to focus an image clearly on the retina. The rule being that them more effort requited, the more the eyeball needs to grow. When the growth finally gets to the point where distant images require no effort to focus, the growth is supposed to slow and stop. Also, there is supposed to be a mechanism that stops the growth process for both the body and the eyes around age 20. The question is what can go wrong the the eye's growth process and what, in your children's situation, can cause significant nearsightedness.

Lets consider your son’s situation first. For him to be nearsighted and need to wear minus lenses for distance vision, either his lens system is too strong (has too much plus) for the length of his eyeballs or his eyeballs have grown too much for the available plus power or a combination of both. There is no known way (at this time) to positively control eyeball growth. Eyeball growth is believed to be caused by a specific hormone produced by the retina, when it detects an out-of-focus image, but so far there is no absolute proof. If the hormone exists, like all hormones in the body, genes play a very BIG role in how they work. There was some work done a few years ago at Johns Hopkins University in Baltimore into the causes of extreme hyperopia (farsightedness), where the eyeball fails to grow. There was reportedly some evidence that the LACK of the mysterious hormone may have played a role in the failure of the eyeball to grow, but it was not very conclusive and I have read nothing further about the research.

How could bifocals help slow your son’s nearsightedness? If increasing nearsightedness is caused by focusing effort (which in turn causes eyeball growth), bifocals can significantly reduce that effort and hopefully slow the increase. It might help or it might not, but it really cannot hurt to try.

You did not mention his current Rx, but if his nearsightedness is caused by his eyeball growing too much, too fast, it could cause stress on his retinas and make him a good candidate for retinal detachment. Anything that could potentially slow the growth is worth trying.

In your daughter’s situation, all of the above applies. However, if retinal detachment is very likely, whatever is necessary to prevent or minimize detachment should be done without delay. Retinal detachment is a leading cause of blindness in people with high myopia (nearsightedness).

You did not mention where you live or what specific facilities are available, but it appears that you are trying to do the very best you can for your children’s vision. The important thing is to manage the problems as well as you can for as long as you can. Medical breakthroughs are occurring every day and you want your children to be able to take advantage of them. Vision actually occurs in the brain, the eyes are merely biological cameras. Early brain development needs the best vision input from the eyes that it can get. Sometimes, if the vision input from the eyes is poor, the brain will decide to simply ignore it (amblyopia). The problem is that once the brain decides to ignore the input from the eyes, it appears to be permanent and we have no way to turn it back on, even if the vision problem is corrected.

Please keep us advised and we wish you and your children the very best.

C.


ConcernedMama 18 Nov 2012, 08:33

Hello all,

I have just found your site whilst searching for information to help my two kids. Maybe you could offer some advice?

My son (6) and my daughter (4) both wear glasses for nearsightedness.

My son's case is a relatively simple one - he has worn glasses since he was 3 and his prescription is nowhere near as high as his sister's so I haven't been too worried. However, after having his eyes checked this week, the ophthalmologist suggested him getting bifocals as he said that his sight was quite bad for his age?

My daughter was born prematurely (at 30 weeks) and has always had very bad sight. She has now been diagnosed with progressive degenerative myopia as her sight is getting worse very quickly. She currently sees a pediatric ophthalmologist every three months and needs a new prescription each time. She has now (this week) been referred to a low vision service and her PO wants her to see a specialist in high myopia at a university hospital. I'm very concerned as her PO said that her retinas do not look in good shape and that she may need an operation to try to secure them and stop the progression of her bad sight. I'm not really familiar with medical stuff, sorry.

Do you have any tips on stopping their sight from getting worse? My husband and I both wear glasses for nearsightedness that are quite strong but not that bad. My daughter is supposed to be trying contact lenses but not until we've seen the specialist and my son is going to try bifocals but is there anything else we can do? Please help!


Clare 18 Nov 2012, 04:04

Soundmanpt - guest's prescription looks a bit different to mine now Cactus Jack has transposed it. At -2.75 and -3 I wouldn't drive anywhere without contacts/glasses and even at my first prescription which was only around -1 I was told I should always wear them for driving.


Trent 17 Nov 2012, 20:08

Soundmanpt

Thanks for your posting. I have moved this conversation to the Online Retailers thread.


Soundmanpt 17 Nov 2012, 15:36

Trent

I just did a quick check using your rx and they do go up to -10.00 for sph and everything else was good as well. If your curious i picked glasses that were $19.00 and with the addition of progressive lenses and AR coatig the price came to 45.90 not including the shipping charge that if your in the states is $4.95. Shipping to the UK is about $9.00.


Soundmanpt 17 Nov 2012, 15:29

Trent

The one I heavily favor is Zenni. The glasses are well made the lenses have proven to be very accurate to the prescription and of course the price is very good.

The only question is and I didn't check is what their limit is. One thing to be sure of is where you need to select your lens type be sure to click on the 1.56 index and not the 1.50 lens as I know that only goes to a much lower script.

That site is "zennioptical.com"


Trent 17 Nov 2012, 13:16

I'm currently enjoying a well deserved vacation which has allowed me to get away from the office where I am required to do a lot of close up work. Over the course of the past week I have noticed my vision changing to a point where I was having a difficulty focusing on distant objects. This concerned me so I payed a visit to the eye doctor. My new prescription is now -0.5 D stronger than my last Rx.

R -8.25, -2.50, 003, +2.00

L -8.25, -2.50, 173, +2.00

Normally I get my eyes checked during a work week. The doctor explained to me that when I do this the ciliary muscles are not fully relaxed causing the lens to become more spherical for short range focus. I believe Cactus Jack has alluded to this phenomenon in the past. My hope is that the correction will help me to see better when I'm driving at night.

If anyone can recommend a reliable on-line dealer for quality high index progressives lenses I would appreciate it.


Cactus Jack 16 Nov 2012, 19:18

Guest,

To get a little bit technical, there are several elements to a glasses prescription. The sphere correction is the first number and it is either minus to correct nearsightedness (myopia) or plus to correct farsightedness (hyperopia). The second number is the cylinder correction for astigmatism and it always is accompanied by the axis or direction of the long axis of the cylinder.

There are two ways to write a cylinder correction. Plus cylinder is typically used by MDs and Minus cylinder is typically used by Optometrists and Opticians. It really does not mater from an optical point of view because the results are optically identical. In fact lens makers typically use Minus cylinder because it simplifies grinding the lenses and there is a simple procedure for converting from Plus cylinder to Minus cylinder. The conversion process affects the value of the sphere correction, the sign on the cylinder and the value of the axis by 90 degrees. Often, if you are not familiar with the different appearances of plus cylinder and minus cylinder Rx, you think there has been a BIG change in your prescription when there really has not been much change at all.

For example, you posted: (Typically in a prescription, the Right Eye (OD) is listed first and the Left Eye (OS) is listed second.

Right Eye (OD): -2.50, +1.00 x 85 ADD +3.50

Left Eye (OS): -2.25. +0.75 x 120 ADD +3.50

converted to Minus cylinder, your Rx is:

Right Eye (OD): -1.50, -1.00 x 175 ADD +3.50

Left Eye (OS): -1.50, -0.75 x 30 ADD + 3.50

By tradition, the axis values (in angular degrees) can only be 0 to 179 or 1 to 180 degrees. 0 is horizontal and 90 is vertical with the numbers increasing in a counter clockwise direction looking at the patient. When doing the conversion, the 90 degrees is either added to or subtracted from the original axis to keep the number in the above range.

The ADD for reading only affects the sphere correction within the reading segment. You can calculate the absolute sphere value of the reading segment by algebraically adding the ADD value to the sphere. In your case -1.50 +(+3.50) = +2.00.

At 55 you have probably developed some presbyopia, but your myopia has actually helped you focus close at the expense of your distance vision. Astigmatism affects vision at all distances and particularly affects your ability to read small text at any distance.

Bright light helps you focus at all distances by causing your pupils to contract to limit the amount of light entering your eyes. It has the same effect as closing down the “f” stop on a fancy camera or looking though a pin hole or the hole on a button. Your pupils expand for low light conditions and the focus help goes away.

I hope this long explanation helps you understand your vision and its correction better. As a prescription goes it is really a low one, but as Clare said, you should not be driving without vision correction and as Soundmanpt said, I think you will really notice a difference with your glasses. It may take a day or two to get used to wearing them and get over the comments from your friends and relatives. The simple answer to their questions is that your vision with them is great and you wish you had gotten them sooner. Expect others to want to try on your glasses. Some may make comments about your vision without them, but there may be a few who, don’t wear vision correction and get very quiet. They just made a surprising and unexpected discovery about their vision.

C.


Soundmanpt 16 Nov 2012, 18:16

Clare

I didn't say it but when I responded to "guest" I was thinking the very same thing. Even though "guest" sph is slightly less than yours the cyl easily brings it up about where your at. So how safe do you think you would be without your contacts or glasses to drive? Nothing personal but I think I would get out and walk. lol


Clare 16 Nov 2012, 14:00

guest - I hope you don't drive!


Soundmanpt 16 Nov 2012, 11:24

guest

Yes I really think you will be surprised at the difference your glasses will make. After you get them and wear them for a short time I think you will even wonder how you got by without them for so long.


guest 16 Nov 2012, 09:45

I recently went for an eye test, 1st since I was 16 (55 now) and got the following prescription L -2.25 +0.75 @ 120 R -2.50 +1.00 @ 85 add +3.50 both and I was told that I really needed to wear glasses for distance and close work.

I'd recently noticed that my vision seems to go very poor later in the afternoon when the light starts going, in fact I was really struggling once it started getting dusk/dark, everything goes blurred, it's not so noticeable in the daylight.

I did wear glasses between the age of 10 and 17 but then sort of got out of the habit of wearing them and have never bothered since.

Also I have noticed that I can't read the iphone either at a distance or especially close, it's terrible!

Anyway I'm probably going to get some glasses sorted out soon and see how I get on with them.


Soundmanpt 15 Nov 2012, 18:55

Jim

My suggestion would be for her to return to where she got her eyes examined at and she need to tell the doctor what is going on. Yes, I think there is little doubt she would benefit from bifocals or else she will be doing the switching of glasses thing all the time. It would be so much easier for her to have everything in one pair and be done with it. Her new distance glasses are only making it worse for her now. I'm sure she can still read close up pretty well bare eyed. If her recent glasses for distance was prescribed within the past few months most optical shops will do a re-exam and only charge her the difference between single vision lenses she got and progressives or lined bifocals which ever she decides on. She shouldn't wait too long to return as the time frame varies from store to store. Generally 2 months in most.


Jim 15 Nov 2012, 18:42

My wife is 47yrs old and was just perscribed glasses for the first time with a perscription of L-.75 R-.75 +.75 10. She also recently bought some over the counter +1.25 readers that she seems to be using more and more. She says she can get by reading for a while, but with her distance glasses on she can't seem to see up close at all. Is she a candidate for bifocals? Even though I'm not quite sure in her mind she's ready for that, haha.


Soundmanpt 15 Nov 2012, 09:37

boyfriend

I too think the answer is yes to both your questions. Her vision is not all that bad but the fact that she wears contacts means her eyes are used to full time correction. So the fact that her glasses are in the bathroom next to her contacts means she likely removes her contacts at night and wears her glasses before she goes to bed. The more you get to know each other I think you will get your wish as she will wear her glasses at some point. And then if you like the look it would be in your best interest to complement her on how nice she looks with glasses and that she should wear them more often. If she is into you I think she will wear them more often.


Cactus Jack 15 Nov 2012, 06:15

boyfriend,

Yes! and Yes!

C.


boyfriend 15 Nov 2012, 02:59

I've been dating this girl for around 3 weeks and was at her place for the first time yesterday. I noticed contact lenses and glasses in her bathroom (didn't realize she wore either). The prescription on the contacts was -2.25 and -2.50. Do you think she needs them all the time? Will I eventually see her in glasses? Because the thought of that is very exciting to me! She' s about to turn 21. Thanks


Cactus Jack 20 Oct 2012, 16:20

Abby,

Genetics appears to play a big role in the progression of myopia. Myopia is caused by a mismatch between the length of the eyeball and the total optical power of your eye's lens system. Part of the process of growing from childhood to adulthood involves growth of the eyeball to match the growth of your head. This growth is believed to be controlled by a hormone produced by the retina whose production is stimulated by the effort required to focus images on the retina. The production of the hormone is regulated by genetic factors. If there is too much hormone production, a person tends to be myopic. If there is too little hormone production, a person tends to be hyperopic.

Unfortunately, there is no known way to minimize or encourage production of the eyeball growth hormone nor is it positively certain that a special hormone exists.

To answer your question, you MAY be able to minimize the progression of your myopia by reducing the accommodation workload. The way you do that is by reading and doing other close work with a reduced Rx by using an older Rx for reading and using the computer or by getting a bifocal, trifocal or progressive add. However, there is no guarantee that it will affect the long term outlook.

A couple of things to be aware of: High myopes are prone to retinal detachment and when the time comes to bear a child, often women who are myopic experience a significant increase.

C.


Puffin 20 Oct 2012, 14:36

ahh now don't worry about the odd millimetre of extra thickness. It's attractive. Or not noticeable. btw I'm not 17 anymore, but have seen a few things. Seeing is everything.


Abby 20 Oct 2012, 12:26

Ellie -- I'm also 17.


Ellie 19 Oct 2012, 17:17

Hi Abby, I have a similar prescription to yours. I think I'm at -12 something and -13 something, but I'm due for an appointment in a few months, when I will undoubtedly receive a new (and higher) prescription. I don't think my glasses look too bad. I get mine from zennioptical.com and I buy the 1.67 lenses. I got frames with wide sides, so the thickness isn't obvious unless you're looking at me from a closer distance. How old are you? I'm 17.


Abby 19 Oct 2012, 13:03

About 3 years ago I became aware of my glasses prescription and of other kids' prescriptions -- my siblings, cousins and friends. Three years ago I had -9.25 and -9.50. Now it's -13.50 and -14.00, which means an average increase of about -1.50 a year. My siblings, cousins and friends all increased less than -1.00 a year. None of them has more than -7.00. I read a lot but so do they, so I don't know why my eyes are doing this. I plan to go to college. What are my gkasses going to look like then? Pretty horrific. Can someone please help me?


Revolver 18 Oct 2012, 10:48

Hee hee hee! The only place you'll find a -100 lens is in a story written by Specs4ever.

Sorry, old buddy, just couldn't resist that one, I still respect your writing and enjoy your stories.


GOCer 17 Oct 2012, 21:29

Many other countries omit the decimal in lens powers. In Taiwan most people talk about "1000 degrees" when referring to -10.00


Cactus Jack 17 Oct 2012, 18:41

Leo,

I suspect you omitted some decimal points or commas in posting your Rx. -1.00 and a small amount of cylinder means that you see pretty clearly up to about 1 meter (39.37 inches). Beyond that, things start getting fuzzy. If you like living in a very small world, don't bother. If you want to see well beyond that, wear them to your hearts content. You do not need anyone's permission if the safety of others is not involved.

C.


myopeinhere 17 Oct 2012, 17:53

With -100 just for watching tv really,the lenses would be that thick you wouldn't be able to close the car door to drive so thats one less worry ;-)


Leo 17 Oct 2012, 15:32

Hi guys.. This is my prescription R sph -100 and L sph -100 cyl -25 and axis 45.. Just wanna know do i have to wear glasses every time?


Barbara 17 Oct 2012, 15:19

My left and right both eyes number is -1.25


Cactus jack 11 Oct 2012, 19:35

Lee,

Could I ask you a couple of questions?

1. How old were you when you got your first glasses?

2. Do you know your first Rx?

3. After getting glasses did you read and do close work mostly with or without your glasses?

4. May I ask your occupation?

Thanks

C.


Lee 10 Oct 2012, 16:07

Hi all, I'm 32 and mr ex both eyes, -1.75 add +1.50, I have bifocals and multifocal contacts. I was 31 when I got prescribed an add/readers over contacts.


Revolver 29 Sep 2012, 09:59

First off, that refraction story is such a hoot I can barely see to write this because of the tears of laughter.

Orthokeratology is very real, and in certain cases, can be very effective for both minus sphere and cylinder. The technique involves a series of rigid contact lenses with increasingly steep base curves to be worn at night. This will flatten the cornea temporarily so that in most cases the patient will have clear vision throughout the day with no correction being worn. Can't imagine it would be very comfortable, however.


Newly Blind 29 Sep 2012, 08:08

Hi Edna

I am no expert, and I have doubts about my ECP being an expert either, but he does soething called ortho-K which I think is meant to slow down the progression of short sightedness by wearing some kind of contact lens overnight that prevents the eyeball growing or something?

Perhaps you could google it. I have no more info as my eye issues are of a competely different nature.

Cheers

Newly


russell 28 Sep 2012, 16:01

Found this and giggled all the way through it. I don't know what thread it needs to be posted to, but I'm sure everyone here will want to make sure others read it.

http://www.optiboard.com/forums/showthread.php/31523-How-Optician-Refract


Cactus Jack 26 Sep 2012, 10:53

Edna,

I have been very busy for the last week or so and I apologize for the delay.

I thought Likelenses had provided a good response and I in general agree with him that that is a fairly large, but not unheard of, increase. The question is: What, if anything, can be done about it?

Nearsightedness (Myopia) in children is usually caused by the eyeball growing too fast or more than it needs to as the child grows. This growth is caused by a natural, genetically stimulated and controlled process that is part of the eye’s development. Sometimes, the growth process is too fast or too much and myopia results. The amount of excess growth is very small, about 0.6 mm per diopter, so in your daughters case it is only about 3 to 4 mm too much. We are not sure of the exact biological process, but it is believed that the excess growth is caused by excess production of an eye growth hormone that is produced by the retina and that is stimulated by focusing effort.

There are a lot of different opinions about all this, but there is a lot of evidence that the root cause of nearsightedness is in our genes and their activity is triggered by our visual environment.

It appears that your daughters myopia is increasing at a higher than typical rate and it is possible that she has progressive myopia. I would strongly urge you to take her to an opthalmologist who specializes in progressive myopia and get his/her expert evaluation. Unfortunately, there is no known way to directly affect eyeball growth by regulating the growth hormone (scientists are not absolutely sure of its nature). Sometimes, attempts are made to reduce the amount of growth stimulation by reducing the eye’s focusing (accommodative) workload, using bifocals or reduced minus power reading glasses. Theoretically, that should help slow the myopia, but proving that it worked, didn’t work, or that the rate-of-change of myopia was affected by the reduced accommodative workload, is extremely difficult. You have probably heard the statement that “you cannot PROVE a negative”. That applies here also, you can’t prove what didn’t happen.

At this time, your daughter’s myopia is not particularly unusual or dangerous to her eyesight. However, if it continues to increase into double digits, it could affect her best corrected visual acuity and also make her more susceptible to retinal detachment. Like all progressive medical conditions the sooner action is taken to manage a condition, the better.

We wish you and your daughter the very best and we would appreciate your keeping us

advised of her situation


Likelenses 25 Sep 2012, 22:13

Edna

-7.00,AND -5.50 are already a high prescription for her age.

Usually increases are about -.50 per year until the mid twenties age range.At this rate her glasses will be aprox. -11.5,and -9.5 at age twenty four,and that is assuming no more large increases like she just had.

At what age did she get her first glasses,and what was the prescription ?Also has she had other large increases?


Cactus Jack 21 Sep 2012, 13:00

Edna,

How could I forget you? I think it would be useful to try to help you understand what MAY be going on with your daughter's vision. Unfortunately, this is a situation where a short question deserves a LONG answer. It may take me a day or so to answer.

C.


Edna 21 Sep 2012, 06:49

Cactus Jack did you forget me?


Likelenses 20 Sep 2012, 14:42

Edna

That is a large increase for her age,and within a year.

Has the doctor said anything about this,and have her previous increases been over 1.00?

There is some merit in prescribing bifocals for patients such as your daughter.The idea being that the strong minus lenses that allow her clear distant vision,also cause strain when she is doing close work.This strain contributes to causing even greater increases in the myopia,and the need for stronger glasses.

The use of bifocals has slowed down the progression of high myopia in many patients.You may want to ask your doctor if he feels that she has progressive,or sometimes called galloping myopia,and if he thinks that bifocals would benefit her.

The bifocals would be a help especially with the school year just beginning.

How close does she hold reading material with the new glasses?Many myopes hold their work too close to their eyes out of habit.She should work on not reading closer than twelve inches from her eyes.


Edna 20 Sep 2012, 13:37

14 years old, 1 year ago


Cactus Jack 20 Sep 2012, 11:13

Edna,

The important numbers are the first number in the Rx. That is the sphere correction for her myopia or nearsightedness. It has increased by -1.25 in her Right eye (OD) and -1.50 in her Left eye (OS). The significance of this increase depends on her age and the time since her last Rx before this one. The need for sphere correction is usually caused by a mismatch between the length of her eyeball and her eye's lens system. The length is often caused by the eyeball growing a bit too much and becoming a bit too long by about 0.6 mm per diopter of correction (e.g. 0.6 x -7.00 = 4.2 mm).

The next two numbers are nothing to be very concerned about. The second number is the cylinder correction for astigmatism and the third number is the axis or direction of the cylinder correction. Astigmatism is usually caused by uneven curvature of the front surface of the cornea. It s cause is unknown and it usually changes very slowly. Often small changes in power or axis are caused by mis-judgement during the exam itself. During the exam for astigmatism, the patient is asked to judge relative blurriness or two lenses. It is hard for an experienced eye exam patient to get it exactly right and even harder for an inexperienced patient. Fortunately, small errors in cylinder and axis have a very small effect on visual acuity.

Could you advise her age and time since her last exam?

C.


Edna 20 Sep 2012, 10:47

My daughter wears glasses. She didn't pass the eye screening at her school and I took her to the eye doctor, who gave her a new prescription. I am pretty sure her new glasses are stronger, but can someone tell me how much worse they are? Three of the numbers went up and three went down. Here is the comparison.

OD -4.75 -1.75 75 OS -5.50 -1.50 110 old

OD -6.00 -1.50 80 OS -7.00 -1.00 105 new


Asdoo 17 Sep 2012, 18:20

Clare

I can tell if lenses are plus or minus. If they are very weak, weak, moderate, strong or super strong. I can also tell if they have cylinder.


Melyssa 17 Sep 2012, 13:55

Clare,

I can usually tell plus vs. minus, and that's it.


Clare 17 Sep 2012, 13:35

Not sure where to post this really: how much do we think people who wear glasses, especially I suppose those with stronger prescriptions, are able to judge the strength of others Rx?


Lyn-68 11 Sep 2012, 01:38

Asdoo thanks for all your help will check with optician today what lenses they will be using


Asdoo 10 Sep 2012, 15:40

Aspheric lenses are lenses that are shaped in a way that allows lenses to have flatter curves without having a lot of distortions. This means the lens is thinner and there is a bit less magnification. This is good for your prescription because it will reduce the magnification and thickness in your right lens.


lyn-68 10 Sep 2012, 13:32

Asdoo could I please ask what aspheric lenses are please sorry if this sounds silly.


lyn-68 10 Sep 2012, 13:31

Cheers both picking them up on 19th this month so will post back on how they look and more importantly how I see through them

Although they cost just shy of £200 as was told they were classed as two different lenses but hey if I can see!!


Soundmanpt 10 Sep 2012, 12:51

Lyn-68

All they are trying to do is make your glasses look nicer. If they didn't make the one lens thinner your glasses would have one lens looking pretty thick and one lens looking much thinner. I would agree with what they are suggesting to you.


Asdoo 10 Sep 2012, 10:03

Lyn,

My prescription is very similar to yours. If you want to your lenses to look more balanced you should get aspheric lenses. Aspheric lenses reduce thickness and magnification. You should also ask for them to make the left lens thicker.


Lyn-68 10 Sep 2012, 07:37

New vaifocal wearer

my prescription is as follows

r eye +3.00 sphere, -1.50 cyl, 10.0 axis, near +1.25

l eye +0.75 sphere, -0.75 cyl, 156.0 axis, near +1.25

been told got to pay for two different lenses as need one lense thinninh down is this correct


Cactus Jack 09 Sep 2012, 00:37

First Time Wearer,

Not very strong, but probably enough, particularly with the cylinder, that you will want to wear them full time.

Maybe I can help you understand your Rx better:

The sphere correction actually means that your eyeballs are just a tiny bit too long for the total optical power of your lens system. The -1.25 for your right eye means that everything beyond 80 cm or 31 inches is progressively more fuzzy. The -2.00 for your left eye means that everything beyond 50 cm or about 19 inches is fuzzy. If that was the only factor, your brain would select your right eye for the best image for distance and pretty much ignore the image from your left eye. For reading, you brain would primarily use the image from your left eye and ignore the right. However, your astigmatism is enough to really complicate the issue.

The -1.00 of cylinder in your right eye means that the front surface of your cornea is curved more steeply in one direction than it is in another and the 104 degree axis (not quite vertical) your Rx is -2.25 and in the 14 degree axis (not quite horizontal) it is only -1.25. The -0.75 of cylinder in your left eye means that your Rx in the 10 degree axis is -2.75 and in the 100 degree axis it is -2.00. What all this means is that the astigmatism causes images to be fuzzy at all distances.

Usually, low myopia like your means that you would mean that you could probably read and do other close work quite comfortably without correction, but distant objects and text would be blurry. The astigmatism causes your eyes and brain to have to work extra hard to try to focus at any distance. Unfortunately, there is no way for the eyes to deliver a quality image to the brain at any distant with as much astigmatism as you have without correct.

I suspect it will take you a few days to get used to wearing your glasses. You may find that "round" objects look a little egg shaped and the corners of rooms near the ceiling look a little "funny, but this will all go away in a few days. I think that in a few days, you will find that wearing your glasses significantly increases your comfort and energy. Vision actually occurs in the brain and the brain expends an amazing amount of energy processing blurry images. When you wear your glasses, the high quality images require very little processing and your brain can relax or spend effort on other things.

C.


First Time Wearer 08 Sep 2012, 16:51

Sorry about the double post.


First Time Wearer 08 Sep 2012, 16:50

I just got new glasses. My prescription is:

R sphere -1.25 cylinder -1.00 axis 104

L sphere -2.00 cylinder -0.75 axis 10

Is my prescription strong?


First Time Wearer 08 Sep 2012, 16:50

I just got new glasses. My prescription is:

R sphere -1.25 cylinder -1.00 axis 104

L sphere -2.00 cylinder -0.75 axis 10

Is my prescription strong?


antonio-o 01 Sep 2012, 08:52

Hi holly,

I just remember you said you had this enormous blur when you wear your new glasses and suddenly put them off.

On the one hand that´s normal and occurs to all of us,

on the other hand if this blur is really that giant,

could be these glasses are too strong for your eyes,

so please get them checked at another optician whether they are really the -2,5 and -2 they need and not -3.5 and -3 because they made a mistake or even more.

The stronger they are the more the minify things, too.

If they are really -2,5 and -2 you can get your eyes checked again if they are a little better than that,

but please make sure your glasses are not stronger than -2,5 and -2 what you need

in order not so make your eyes worse than they are.

If they are -2,5 and -2 I guess they are fine for you now.

How was your eve in them ?

best regards, antonio-o


Soundmanpt 31 Aug 2012, 07:57

Asdoo

Remember the question was "when is it recommended to wear glasses full time for astigmatism?" I can't say for sure but it is possible that she was told she should wear her glasses full time and she has just ignored it. But quite often at -.75 or -1.00 in both eyes is when often times headaches will result. Also please remember I am only saying generally, there is no hard and fast rule.


Asdoo 31 Aug 2012, 02:11

I have a friend who's rx is sph +0.50 cyl -0.75 for both eyes. She never wears her glasses.


Soundmanpt 31 Aug 2012, 00:45

Likelenses

I would not disagree with that.


Likelenses 31 Aug 2012, 00:07

Lucas

Several books on optometry that I have read, advise doctors to recommend full time wear, when the cylinder in the better eye is .75 or more.


Soundmanpt 30 Aug 2012, 18:12

Clare

You have been on this site a good while and I know you have seen the discussion on this many times in here. The best way I can answer that is to say it really depends on the person and what they can tolerate. Like your friend she would tell you she thinks -1.25 requires full time wear and maybe for her that is true, then there have been others in here claiming they can still drive with correction and their prescription is -5.00. So I guess the true answer is somewhere between those numbers. Also other things enter the picture. For example if they have any astigmatism correction as that will lower the SPH number. But I think for most -1.75 or -2.00 I would say is at the least on the border of being full time. Again when we are saying full time I am referring to needing them on an everyday basis. Being able to go without correction around the house or not putting your glasses or contacts in when you first get up doesn't count. Don't get me wrong it's good that you can still do that but it's still not the same as say just putting them on to drive or see a sign.


Soundmanpt 30 Aug 2012, 17:58

Lucas

Well this may draw fire from some out there but as a general rule I think when you reach around -1.00 or +1.00 CYL most doctors recommend full time wear. It is a much lower number than a SPH number would allow.


Lucas 30 Aug 2012, 16:00

What about astigmtism level. What is the recommended full time wear level


holly 30 Aug 2012, 15:43

Clare,

At L-2.5, R-2.0 I am wearing a lot more than before. I still don't wear anything around the house and usually contacts during the day.


Clare 30 Aug 2012, 14:13

Soundmanpt - what do you consider to be the threashold for full time wear?


Soundmanpt 30 Aug 2012, 09:56

johnnie

Most every country in order to pass the vision test and be considered safe to drive your vision needs to be 20/40 or better. At -1.50 / -1.25 you will not pass. You can try but i'm sure they will quickly tell you that you need correction, so you better have your glasses with you so you can put them and pass the test. You are borderline with needing them full time, they will make a noticeable difference in how you see.

If you go on-line to "zennioptical.com" your glasses will be around $15.00 - $25.00 including the AR coating and shipping.


Guido 30 Aug 2012, 09:31

That is not a negligible first prescription. If finances are not a problem, I would get some glasses. You can use one of the online services and get them from $70-100. However, I would try the driving exam without just to see if you pass.


johnny 30 Aug 2012, 09:16

I was just perscribed my first pair of glasses at the age of 20. The perscription is -1.50 -0.50 10, -1.25 -0.50 180. I haven't ordered the glasses yet, but I think I'll need them when my time comes up in December to renew my driver's license. Should I order some glasses or is it not worth it. Will I be able to pass the eye exam for the driver's test?


Sappho 30 Aug 2012, 02:11

Nearsighted 18 year old girl.

If you drive, I should certainly borrow your sister's glasses to use when driving and I suspect you will end up wearing them all the time.


Soundmanpt 29 Aug 2012, 18:26

Nearsighted 18 Year Old Girl

It has been more than 15 months since you got your last glasses and exam. Being 18 your still very much in the age group where your eyes are constantly changing, so like Crystal Veil said it is indeed time for you to get your eyes checked. Your sister's glasses may still be slightly stronger than you really need but at 18 it is easy for your eyes to see very well with stronger glasses than needed. Your own glasses are now too weak and are under correcting you so i'm sure your sister's feel better.

It really helps that you and your sister are so close with your astigmatisms as well. If you notice her old glasses her astigmatism was not as close so that is probably why they didn't work nearly as well as her new ones.

I really don't think your doing much if any harm wearing your sister's glasses. They may be just slightly stronger than you need but it seems your eyes has adjusted to them well. But you should probably get and exam so you can get your own. Your sister may decide she wants to wear her other pair at some point.

When you do go and get your eyes examined post your new prescription in here. It likely will be very close to your sister's prescription.

Sorry for making you have to work on getting your prescriptions posted.


Crystal Veil 29 Aug 2012, 17:24

Problem solved - you need an increase. The cylinder axis is almost identical in your and your sister's prescription but the spherical strength of her new glasses is over a diopter more than your own glasses. Time for an appointment!


nearsighted 18 year old girl 29 Aug 2012, 16:46

wow, you made me do a lot of research. i found my prescription and i asked my sister what hers is and she read it to me.

my last prescription was in may 2011. it says

OD -6.75 -1.25 80

OS -7.25 -1.25 110

every time i have an eye test i need stronger glasses.

my sister is 2 1/2 years older than me. she always had stronger glasses than me. she said her old ones are:

R -7.50 -.75 85

L -7.75 -1.00 95

i couldn't see so good through those. her new ones are

R -8.25 -1.00 80

L -8.75 -1.25 105

i feel like my eyes really do much better through those then through my own glasses. i hope its ok to borrow and use them


antonio-o 29 Aug 2012, 16:34

Nicky, ok, so you want the maximum for seeing best far for one eye and the maximum minus prescription still allowing you to see nearby with the other eye ? or even a plus prescription for this eye ?

best regards, antonio-o


Nicki 29 Aug 2012, 16:13

Hi Antonio

Contacts wearers do mono vision when they have need to focus up close over 40. That's not with glasses.


antonio 29 Aug 2012, 16:08

hi Nicky,

why and how do you want to do mono-vision ?

best regards, antonio-o


antonio-o 29 Aug 2012, 16:02

nearsighted 18 year old girl

if your sister´s glasses are considerably stronger than yours

you risk to make your eyes worse than they are now by wearing hers a lot.

It seems more wise to get your eyes checked

and if really your prescription in this test is very similar to your sister´s current one, then you could wear hers,

otherwise you risk making your eyes worse than they are wearing too strong ones.

That´s my personal opinion to your question.

Best regards, antonio-o

if you like you can come to

http://www.lenschat.com/lenschat/

and discuss the theme with us


Nicki 29 Aug 2012, 15:04

Sorry just read that post - i mean I'd like the maximum correction for both, ie strongest correction. Big difference!


Nicki 29 Aug 2012, 15:03

Hi

I wondered what success people have had in guiding the optician in the prescription that suits them? I like to be slightly over corrected and am about to go to a new optician. I wear glasses socially and contacts at work and think I need to start doing mono vision, like some of my friends who tell me it's a good option. Can I say that I want the minimal prescription for both? I've heard that standard practice is to under correct. Thanks.


Soundmanpt 29 Aug 2012, 12:38

nearsighted 18 year old girl

Well first off when did you last have your eyes examined? If it has been a year or more it is very likely that you probably need an increase in your glasses. Also it would help to know the prescriptions of both you and your sister. But I assume she wears a little stronger prescription than you do normally? Most people find they can be very comfortable wearing glasses a little over their own prescription, so that could be what is happening in your case. As long as you are able to see perfect with her glasses you are not doing any damage to your eyes, but I still recommend that you should consider getting your checked in the near future. Are you able to wear them all day without any problem or are you just going by having them on a short time?


nearsighted 18 year old girl 29 Aug 2012, 10:49

my older sister and i both wear glasses. we're nearsighted. she just got new ones and she got 2 pairs on a buy 1 get 1 free special. when i looked through them, i could see better through her glasses than through my own. she offered to let me borrow one of hers. is it ok to wear them even if i didnt have an exam? we both wear glasses not contacts. and theyre pretty thick.


Scott 29 Aug 2012, 08:06

Hi cool dude

Your prescription has similar numbers;

The first values (Sphere) are just +0.50 and +0.75,

The second sets of numbers are again close to each other, -1.75 and -1.50' should help at night with distance

The third set of numbers are the axis that define the angle which the cylinder are angled at. Although your two numbers seem quite different, it is quite common. The 24 and 21 degrees away from the 180 (or zero) degrees.


Lucas 29 Aug 2012, 07:43

HEy cool_dude,

your prescription is indeed for farsightedness but mostly for astigmatism. Your farsigthedness is not that important but your astigmatism at -1.50 and -1.75 should make a huge difference. Were you told when to wear them? I suspect full time wear was recomended no?


Cool_Dude 29 Aug 2012, 06:35

Hi,

I just had an eye exam and the prescription is:

Sphere Cylinder Axis

R +0.50 -1.75 166

L +0.75 -1.50 21

As I understand the plus sign is for far sightedness. However, I have no problem seeing near things or reading. My problem is with far things. I get mostly irritated when I drive at night. I've just received my new glasses and things are sharp! However, I feel a slight strain in my left eye. Can anyone elaborate on the prescription? Why are the axes values so different for both eyes? I am a 34 year old male by the way.

Many thanks


Cactus Jack 27 Aug 2012, 09:59

middle-aged,

It is possible that you may need a very small increase in the correction for nearsightedness, but the most likely thing is that you will get used to having some help for reading or focusing close. There are 2 things going on here. The most obvious thing is that presbyopia is becoming a nuisance and it will gradually take away your ability to focus and you will need more plus either in a bifocal or progressive add (or in separate reading glasses). However, when it gets up to around +2.50 it will appear to stop unless you frequently need to focus closer than 16 inches or 40 cm. The thing that will happen much more quickly is that your ciliary muscles will become de-conditioned because the reading help takes away some of their workload. The ciliary muscles, for their size, are the hardest working muscles in the body, but as presbyopia stiffens the crystalline lenses, it just gets to the point where the muscles just are not strong enough to focus any more.

The main thing is to be aware that some changes are going to happen and when you notice that your vision is not as good as it was, you need to schedule an appointment then. Putting it off until some nebulous future date is not necessary and is probably counter productive. Glasses are simply a tool to help you see better and more comfortably, like shoes, when they no longer fit, you need a new pair.

C.


Cactus Jack 27 Aug 2012, 09:37

Sep,

You did not provide much information to be able to comment on your situation.

Your Rx is pretty ordinary for a person who is mildly farsighted (hyperopic) as indicated by the sphere correction of +0.75. A cycloplegic exam is appropriate in this situations to help determine your true Rx. The dilating agent temporarily paralyzes your ciliary muscles and keeps them from trying to internally correct your distance vision.

You also have significant astigmatism as indicated by the -1.50 diopters of cylinder correction in each eye. Unlike the mild hyperopia above, which, unless presbyopia prevents it, your ciliary muscles and crystalline lenses can correct, you cannot correct the astigmatism without some form of help. The possible forms of help are glasses (normally preferred), toric contact lenses (hard to fit and get right), or possibly refractive surgery.

Astigmatism is caused by uneven curvature of the front surface of the cornea, usually where the front surface is curved more steeply in one axis than it is in another. The result is substantially reduced visual acuity for reading text and identifying small objects at all distances.

With that level of astigmatism, you probably need full time correction for maximum comfort and the best visual acuity.

If you could provided a bit more detail about your age, where you live, and your situation, we might be able to offer better suggestions.

C.


middle-aged 27 Aug 2012, 07:37

Thanks to Cactus Jack and others for the explanation. I picked up my glasses over the weekend and was pleasantly surprised with the clearity of my vision in the distance. Driving at night was the greatest difference. It was amazing to clearly see all the lights instead of just big blobs. I did notice the difficulty in reading with them on more so than without, so a friend gave me an old pair of +1.25 reading glasses and wow what a difference. They'll come in handy at work when I'm doing paperwork. Overall it was a great weekend as I feel I was able to take care of 2 different problems that were becoming more and more an issue for me. What should I expect going forward over the next year or so with my eyes?


Sep 26 Aug 2012, 17:17

Hey guys, Id like to know what the following numbers from my prescription mean. I plan on making a medical appeal and its important for me to know if those numbers are actually favoring me or stacked against my decision to appeal.

The prescription is as follows:

Cycloplegic refraction value is +0.75Dsph / -1.50 Dcyl x 90 in the right eye and +0.75Dsph / -1.50Dcyl x 90 in the left eye.

Thank you.

Regards

Sep

Edit: Sorry if it is a re post. The first time didn't go through.


Cactus Jack 25 Aug 2012, 05:28

very progressive,

I did not think you were being disrespectful in any way. I took the fact that you questioned a statement that didn't make sense to you, as a complement. It meant that you were paying attention and analyzing what I said. Critical thinking seems to be a very rare commodity these days. Yes, + cylinder is generally used by opthalmologists and - cylinder is used by optometrists, but it is not an absolute rule anywhere that I know of.

C.


very progressive 24 Aug 2012, 22:32

CJ,

You are awesome and I for one always appreciate your knowledge and willingness to answer all of our questions. Didn't mean any disrespect. Just thought I might have been missing something. The cylinder being written as a + would generally indicate that an opthalmologist wrote the rx and not an optometrist correct?


Cactus jack 24 Aug 2012, 15:56

very progressive,

You know, that is the 2nd time in a week that I misread a prescription. Maybe I am developing dyslexia among other problems in my old age. I'll be 75 at the end of next month. Fortunately, we have some good proof readers that don't hesitate to check my work and catch my dumb mistakes. Please keep up the good work.

You are right, she does appear to have -0.75 myopia in her Right eye. If you do the conversion to - cylinder for the Left eye Rx of -0.75, +0.75 x 15 you get -0.00, -0.75 x 105.

I think glasses will make a big difference for her.

C.


very progressive 24 Aug 2012, 13:45

CJ,

Looks to me like Middle Aged's rx is for myopia and -.75 in both r and l lenses, with a +.50 cylinder?

Does this indicate any hyperopia?


Cactus Jack 24 Aug 2012, 09:37

middle-aged,

I did not fully answer your question about - cylinder in a + lens.

The purpose of any external lens (glasses or contacts) is to neutralize or cancel out a refractive error in your eyes. A + lens neutralizes too much minus and a - lens neutralizes too much plus. Technically, the - cylinder correction in your Rx neutralized the excess plus caused by the steeper curvature in one axis of your cornea.

There is a very confusing element with specifying CYLINDER correction in glasses or contacts for those who don't understand. By tradition, MDs (Opthalmologists) are trained to do refractions using + cylinder lenses and Optometrists and many Opticians are trained to do refractions using - cylinder. The different ways of writing the resulting prescriptions can be very confusing. It is a very simple math procedure to convert from + cylinder to - cylinder and vice versa. The resulting glasses are identical in either case because lens makers convert a + cylinder Rx to a - cylinder Rx and make the glasses.

C.


Cactus Jack 24 Aug 2012, 09:15

middle-aged,

You actually have two different corrections for two different conditions in the same lens.

The first number in the Rx is the SPHERE correction for either hyperopia (in your case) or myopia. It corrects for a small mismatch between the length of your eyeball (it is just a little bit too short in your case) and the total power of your eye's lens system which consists of the cornea, a fluid called the aqueous humor, the crystalline lens (which is the variable focus element of the eye until presbyopia catches up with you), and the vitreous humor. Sphere correction is like a slice from the side of a clear ball of glass or plastic. It is also the shape you think of when you think of in a magnifying glass. A plus lens is thicker in the middle than it is at the edges.

The second number is the CYLINDER correction for astigmatism, which is uneven curvature of the front surface of the cornea. The curve is steeper in one direction (axis) than it is in the other. The result is that the cornea has more plus power in one axis than it does in the other. Think of a cylindrical lens as being a section sliced from the side of a clear glass or plastic can shape.

The third number is the AXIS which is the direction of the long axis (through the center of the can). By convention 0 degrees is horizontal and 90 degrees is vertical (rotating counter-clockwise as you face the patient). The number range for the axis is either 0 to 179 degrees or 1 to 180 degrees depending on where you like to start. Whenever CYLINDER is specified, a AXIS must also be specified.

Typically, Hyperopia affects your ability to see close up, Myopia affects your ability to see distant objects, and Astigmatism affects how clearly you see at all distances. Astigmatism significantly affects the sharpness of letters and numbers.

It may take a few days to get used to your glasses, but please let us know what you think about wearing them. I think you will ultimately think the benefits far outweigh the costs.

C.


middle-aged 24 Aug 2012, 02:16

Thanks for the response. I should be getting my glasses on Saturday. I've never worn any type of correction for my eyes, so I'm looking forward to seeing the difference as driving at night in unfamiliar areas or any type of rain has become increasingly difficult and downright dangerous. One more question: can someone explain -0.75 with the +0.75 in my one eye. I didn't know a perscription could be both minus and plus at the same time? And is this eye significantly worse than the other. I do feel a difference in the eye if I close one eye and try to see.


Cactus Jack 23 Aug 2012, 23:54

middle-aged,

You should notice a significant difference in your night vision with the glasses because the images will be focused sharply on your retinas and that concentrates the photons of light on the tiny cells in your retinas and make them easier to detect. Also, because of the astigmatism in your left eye, you may find full time wear to be very comfortable, but it is your choice.

Also, don't forget to eat carrots and other vegetables that have lots of color. The orange in carrots is beta-carotene which your body converts to Vitamin A (much better for your eyes than Vitamin A supplements). Your retinas need Vitamin A and other nutrients to work properly - particularly at night.

Will you need some help focusing close? Probably, your slight nearsightedness has been of help in focusing close, but with distance correction, you may soon need either bifocals or progressives to help out. It depends on how much close work you do.

I think you will find that yes, your near vision is going, but fortunately, it is easy to get back. After a few weeks of wearing glasses that correct both your distance and near vision, you will be delighted and amazed with the results.

Please don't let vanity get in the way of sharp, comfortable vision at all distances.

C.


middle-aged 23 Aug 2012, 22:14

I'm a 48yr old woman who was having trouble seeing at night. I went for an eye exam recently and was given a prescription of R-0.75 sph L-0.75 +0.75 15. Will this prescription make a difference for me? How often do people with this prescription wear their glasses normally? Also I'm beginning to feel my near vision going. Will I need to wear bifocals? Anyone with a similar experience I would appreciate some insight. Thanks!


Julian 23 Aug 2012, 09:04

question: do you still have cylinder in your glasses prescription? the reason I ask is that it is sometimes possible to correct astigmatism with sphere IN CONTACTS but not in glasses. And if you don't have glasses but only contacts read the horror story referred to on the 'Vision' thread about the women who got an amoeba under one of her contacts while swimming...


Asdoo 23 Aug 2012, 07:02

question,

Have you changed your eye doctor? It is normal for doctors to vary on how much cylinder to prescribe. My first eye doctor didn't prescribe any, my second eye doctor prescribed -0.50 for both eyes and my third eye doctor prescribed -0.75 for one eye and -1.25 for the other.


question 23 Aug 2012, 06:42

I'm 20yrs old and have been wearing glasses since I was 13. My perscription started at -1.00 with -1.00 astigmatism. Prior to my latest eye test yesterday, my perscription was L-1.50 -0.75 R-1.75 -0.75 two years ago. My eye doctor told me yesterday that he no longer saw a reason for me to be in toric contacts, which I had been since the beginning, and he perscribed me L-2.50 R-2.25 contacts. Is it possible for an astigmatism to disappear? Also, I'm concerned about my vision with the new perscription. Will there be a big difference? I felt like my vision was fine with my old perscription.


Likelenses 21 Aug 2012, 01:20

Gwendy

Have you gotten your new flat front glasses yet,and if so,how do you like them.


Juicebox 19 Aug 2012, 17:29

Soundmanpt

Yeah I realise I'm not the only person that needs glasses, especially because my whole family wears them, which is why I think it's so weird that I dont want to wear my glasses around them! I think my sister will be the one to ask where they are as she's like that.

I really do enjoy being able to see so well while wearing them, I didn't realise how much my eyesight had changed since I got my first glasses. Now if I'm walking down the street it annoys me when I can't see things. And yeah I really do notice the blur now!


Soundmanpt 18 Aug 2012, 20:19

Juicebox

Thanks for the update. It just takes time to first off get used to wearing them at at, and then accepting how you look wearing glasses. But your slowly finding that You are far from being the only one out there that needs glasses to correct their vision. Once you get back home i'm sure you will allow yourself to be seen wearing them around your family. The best thing is that they already know you have glasses so no doubt someone is going to be asking where your glasses are at some point.

Something you didn't say is how you like wearing your glasses in regards to being able to see with them? I'm sure they must help a good bit for your distance now. The biggest difference is after you have had your glasses on or your contacts in for a while and take them off or out how blurry things are?

Your doing good, your taking small steps in the right direction.


Juicebox 18 Aug 2012, 12:12

Its me again...just an update! I've gotten better about wearing glasses in front of people, (I may even be coming around to the idea of actually enjoying wearing glasses, but im not fully converted yet - sorry folks, I just need a little time!) especially those from back home who hadn't seen me wear them before as I got them at uni. Still can't bring myself to wear them in front of my family for some reason, they all know I have them though!

I got contacts, but I still only wear them for tennis and sports, which I've been able to do a lot of recently thanks to be British summer finally kicking itself into action :)

Hope you're all well!


Specs4Me 16 Aug 2012, 07:08

Gwendy,

You might also consider wearing an old pair of glasses when studying or doing a lot of reading and even computer work. If you wear your prior year's glasses with a -1.00 less Rx that will releave a bit of eyestrain which can help slow down myopic progression.


minus5wholuvsgwgs 16 Aug 2012, 00:19

Gwendt Please do not worry One of my girlfriends is minus 15 /minus 16.25 her glasses are merely flat fronted and with a smaller frame do not look too thick Her eyesight corrected is excellent .And she has no shortage of male admirers And she never wears contacts


Likelenses 15 Aug 2012, 22:06

Gwendy

Your prescription history certainly shows that you have progressive myopia,sometimes referred to as galloping myopia.

Due to the fact that you will be starting your second year of college,the extensive reading will contribute to continuing increases, of most likely -1.00 or more per year for each school year.

Your lenses will be flat front from now on ,and if you reach -15.00 or so they will be bioconcave.

There are some things that a progressive myope can do to possibly slow down the increases. One would be to take frequent breaks while doing close work,and look into the distance. Also pay attention to reading posture,and distance. You should not read any closer than twelve inches from your eyes,with a book, and not closer than twenty on the computer.Farther is even better,if you can do it.


Soundmanpt 15 Aug 2012, 17:34

Gwendy

Those are the most telling years for myopia to have rather big jumps from year to year. The good news is you should be getting to the age where the changes should be less each year and may even stop at around 25 years old. There are likely many in here that have had about the same increases as you have had.


Gwendy 15 Aug 2012, 17:04

Is it normal for nearsightedness to advance about -1.00 a year, sometimes a little more? I have my last few prescription forms and this is what they show (my age, then rx, right eye first):

14 -4.75 -4.50

15 -6.00 -5.25

16 -7.50 -6.50

17 -8.50 -7.75

18 -9.25 -8.75

19 -10.25 -9.75


Soundmanpt 15 Aug 2012, 17:00

Rex

Your rx is pretty mild, but you will certainly notice the difference once you start to wear them a little. They will make the biggest difference in your distance vision. The more yo wear them and adjust to them the more you notice that things are blurry without them. You have a slight astigmatism as well and that can also mean that your glasses may be helpful if your doing much close work for any length of time.

There are some that would wear that rx full time and many others only for what they need them for.

Certainly one thing you really should get used to wearing them for is driving. Driving without would be considered unsafe with your rx. Don't know what country your in but most countries you would fail the vision test for safe driving.


Rex 15 Aug 2012, 16:48

Told need to get glasses. How often do people find they wear them with prescription -1.25 +0.5 x each eye?


Dan 15 Aug 2012, 12:49

Just had my yearly appointment. No changes in my script...still a mild -1.00 in each eye for contacts. Slight astigmatism too I believe. Haven't used the reading glasses/bifocals much lately. It seems that -1.00 contacts work much better than my -1.25 contacts I used a year or two ago. Although, the -1.25's did give me slightly crisper distance vision. Maybe my eyes have stabilized at this point.


gwgs 13 Aug 2012, 03:46

Gwendy, I am sure your glasses will look wonderful on you, and for all those that you think will look at them and go "omg they're strong (which I don't actually think happens at this level of myopia, or in reality - I've never found with some of the highly myopic girls I've known), there will probably be an equally similar number of people who either won't notice them.

It would be interesting to see a photo of them when you get them - this of course is down to you. If you feel like posting a photo of them, it would be interesting to see what the PBC does to reduce the lens thickness.


Gwendy 13 Aug 2012, 00:47

OMG! No wonder she wouldn't tell me what it meant. I have occasionally noticed someone wearing glasses with lenses that looked totally flat and had gigantic reflections. They look terribly strong. People are going to look at me and think I'm blind. I took a close look at my current glasses and the outsides of them have a definite curvature. I'm going to hate them.


skyler 13 Aug 2012, 00:38

Gwendy,

I feel your pain, when I first started with glasses in Middle School. I was only-1, by high school-3.75. Finally now in my softmore year of college -8.25 for glasses (i wear contacts mostly). My optician said I will reach the double digits if i keep up by the time im 25. Is this true?


Likelenses 13 Aug 2012, 00:03

Gwendy

Cactus Jack is correct.

Your new glasses will have lenses that are perfectly flat on the front surfaces.

Perhaps your glasses were like this at -9.,but if they were not,your eye doctor wants the new ones like this so that you will adjust to them better as your prescription gets higher in the future,when there is no other option.

It is also possible that in the future your lenses will be concave on both the front, and back surfaces.


Cactus Jack 12 Aug 2012, 23:39

Gwendy,

Try Plano Base Curve. Meaning Flat Front lenses. A Plano Base Curve minimizes edge thickness. It is pretty common in lenses above -9.00, but is also used in lenses where thickness is an important factor.

C.


Gwendy 12 Aug 2012, 21:40

Thanks, guys. I actually have one additional question. I hadn't noticed it on my prescription form, but I did at the optical shop today when I ordered my new glasses. My doctor had written PLBC on the remarks line. I noticed it when the optician copied it onto my record. When I asked her what it meant her face became red and she said "oh it's nothing, just your base curve." Her secretiveness made me suspect it was something she didn't want me to know. Can someone decode it for me?


Julian 12 Aug 2012, 16:25

Gwendy: I don't know much about genetics, but I have read that a characteristic can often skip three generations. If this is so, you may have had a very myopic great-great-grandparent whom you can blame for your eyesight.


Soundmanpt 12 Aug 2012, 13:14

Gwendy

Understandable why you would be somewhat fustrated. Your correct in your thinking. If both your parents were near sighted you could almost expect that you would be as well. And of course if one parent was nearsighted and the other had perfect vision it would depend which genes you got as to how your vision would be. But with neither parent being nearsighted why would you expect to be nearsighted? Well there are many other factors to be considered. It could be that it skipped a generation or even what you did when you were younger. For example reading with the lights very dim as some kids often did after it was time for bed. And of course if you started with glasses at a young age you have been going through the ages where it is very common for constant change in your eyesight. Meaning stronger glasses every year. Being in your 2nd year of college I would think your around 19 years old. Aside for all the strain your eyes are going through with much studying your increases soon should start to be less and less. By the time you reach around 25 it may stop changing or at least slow way down.


Gwendy 12 Aug 2012, 12:49

So, nearsightedness is supposed to be genetic. No one else in my family has glasses, but I do and my prescription gets stronger every year. My freshman (college) glasses were -9.50 and -9.00 and I just got my sophomore prescription and it's -10.25 and -9.75. It's getting kind of ridiculous. Why am I so nearsighted when no one else in my family is nearsighted at all? And when it this all going to stop?


Soundmanpt 16 Jul 2012, 15:55

Juicebox

I agree totally with you that unless your really into rock climbing and was doing it quite often probably not worth the cost. You could wear the contacts and buy a cheap pair of wrap-around sunglasses that should help keep the dirt and pebbles from getting in your eyes. Of course contacts should be great for tennis.

I'm sure you will get faster each time you put them in and take them out.


Juicebox 16 Jul 2012, 15:09

Clare,

Thanks so much for your encouragement I got some a few days ago and I'm getting better. Then again, pretty much anything is better than the 30 minutes or so it took me at first! I'll be sure to still wear glasses, probably more so than contacts, but I'm not intending on being a full time wearer as I really don't think my rx warrants it, though i believe some would disagree.

Soundmanpt,

Thanks for the advice but I don't do nearly enough to warrant the cost!

So it's taken me so long to reply, been up and down the country the past few weeks and didn't have Internet for most of that time!


Asdoo 13 Jul 2012, 02:19

Guest

Wearing glasses fulltime will help you get used to them faster, but it's not absolutely necessary.


Guest 12 Jul 2012, 17:53

I am 59 years old and have been finding my mid range vision up to around 20ft a little uncomfortuble for a number of months.

My far distance vision always has and is near perfect. And causes me no problems at all.

Today after an eye exam I collected my first ever glasses with a distance rx I was prescribed the following rx

L. + 0.25. Add 2. R + 0.75. -0.25 x 100. Add 2

I opted for single vision lenses

I have been wearing these since lunchtime but I have noticed that my mid range vision is now much sharper but my far distance is now worse with glasses than before.

I have read on here that plus rx wearers need some time to adjust to clear distance but I don't intend to wear them full time ,only when I need to

My question is that unless I wear full time will I always have this problem

with far distance as a part time wearer.

Can anyone give some advise.


Crystal Veil 12 Jul 2012, 16:07

Soundmanpt,

I tried the goggles a few time when rock climbing but they kind of limit the field of view. Re dirt and dust: much depends on the quality and type of rock. Goggles may be fine on limestone cliffs (e.g. The Dolomites can be quite dusty). Much also depends on one's style of "clean" climbing and of course the difficulty of the pitch. Goggles are perfect for running on a sunny day. In all cases, varifocal glasses are a nuisance in steep terrain and I always bring a pair of single vision glasses along when it gets serious.


Soundmanpt 12 Jul 2012, 15:07

Juicebox

Clare is right, it may seem difficult at first sticking those lenses in your eyes, but I think after you do it a few times it will get easier each time.

I am not a rock climber, but I really think at some point you may want to look into rec-sport goggles. The are made for sports and I would think that rock climbing and looking up and grabbing rocks above you would get a good deal of dust and dirt falling at your face. That would not be very good with contacts or glasses really. Dirt and dust will cause problems for contacts and you won't be a position to clean them. The sport g