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Glass Lenses 20 May 2018, 22:37


You made me laugh when in your last post said,"when my vision is on the line", when in reality you can not read any of the lines.

Nothing to worry about, as the coke bottles that have been prescribed for you will clear those lines when your eyes are buried behind them.

confused 20 May 2018, 20:53


I do not appreciate your accusations when my vision is on the line.


That is all that was written.


I will be getting my glasses in a week, don't have them yet. And when I get them, I don't think I will wear them full time. What do you mean by halfblindness????

Lou 20 May 2018, 16:00

Hi Jonathan

I think that you are wise to decline the prism for now, and see how things are at your next eye test, since you are not noticing any issues.

Yes, you can get 0.50 prism. I've previously had it, and also just in one eye, 0.50 base in prism in just my right eye. At my next eye test, I was given the choice whether to have it again, as I could manage fine without it, and have not had prism since.

If it is on the prescription that is being sent off with your glasses, it is likely to be included. Since you don't want it, I think that you should query this with your optician.

No, I don't think that having a prism in just one lens could cause further problems with regards to a muscle imbalance, especially not with 0.50, which is a very small amount of prism, but if you are not having any issues, I wouldn't have it.

I hope that this will help.

Best wishes


Jonathan 20 May 2018, 07:17

I went for my annual eye test recently and was given a new prescription. My optician at the time also advised that I had a slight muscle imbalance in my left eye only and advised that a slight prism correction may help.

After discussing it with her a bit further I decided against it and wanted to see how things were at my next test as I'm not noticing any issues. I was given a copy of my prescription which had the prism column blank. But on the prescription that is sent off with my glasses it had a figure in there of 0.50 and base out (i think).

Looking online all of the information that I could find for prism seems to start with whole numbers (1, 2, 3 etc) so am a bit confused as to whether this is actually even a prism prescription? Especially as everything i've read seemed to say prisms would always be in both eyes and not just one.

Also with it being on the prescription that's sent off with my glasses am I right in thinking it will be included in my lenses even though i'd advised I didn't want it?

Also could having a prism in just one lense cause further problems with regards to a muscle imbalance if one lense has one and one doesn't?

Thanks for any advice

Maxim 20 May 2018, 03:43

Could it be that Mr. Confused is a fake?

I cannot imagine a person ask such a question, when a quarter or half of our population are wearing glasses, and the stuff is taught even in schools.

Nobody in the family, or in the office, from whom you could borrow a pair of glasses just for 30 seconds, to see how it works?

My diagnosis:

- a person extremely lonely (we have them, admitted) OR

- just a fake to keep nice persons, who are prepared to help, busy.

Antonio 20 May 2018, 01:05

Hi Confused,

I have already needed those glasses you need now before you

and I called that state half-read-blindness because I was unable to read far signs or on tv or anything else a bit too far away from my eyes.

So you might consider to wear glasses or contact lenses if you want to read far and maybe they will help for other things too.

Just give them a try. It.s up to you to wear them or not.

Remain calm if possible, best regards,


Antonio 20 May 2018, 01:05

Hi Confused,

I have already needed those glasses you need now before you

and I called that state half-read-blindness because I was unable to read far signs or on tv or anything else a bit too far away from my eyes.

So you might consider to wear glasses or contact lenses if you want to read far and maybe they will help for other things too.

Just give them a try. It.s up to you to wear them or not.

Remain calm if possible, best regards,


Soundmanpt 19 May 2018, 19:31


You're slowly getting their. Now just to be sure are those numbers under the SPH? And these are the only numbers on your slip?

Now Cactus jack can proceed to answer your question?

confused 19 May 2018, 18:42

Cactus Jack,

age is: 21

i found the prescription but don't really understand it.

R: -3.75

L: -4.25


Cactus Jack 19 May 2018, 17:38


Without your complete prescription, we are EXTREMELY confused. There is no way your question can be answered without that and some additional information.

You should have been given a copy of your prescription, but lets start with an easy question.

What is your age?


confused 19 May 2018, 16:05

I'M FREAKING OUT BECAUSE I WENT TO THE EYE DOCTOR TODAY AND I COULD NOT SEE THE BIG E! I could not see any of the chart but what stood out to me was that I could not see the BIG E! My friend was saying how if you can't see the big E, then you must have really bad vision?? Is she right?!? I literally tried to squint and still could not see it. Everything was a huge blur. I knew I probably needed glasses but I did not think it would be that bad. The doctor kept saying how my vision is so bad for a first timer or whatever but that didn't help but make me feel worse. I forgot what the exact prescription was but he said something around a 4?? whatever that means... all i know is that i have really bad vision and i really don't want to have to wear glasses and i've been fine without them so why does it even matter? can someone explain to me my eyesight and tell me if it really is this bad?? cause i don't think so but i'm confused now

London 18 May 2018, 22:33

Posted it last month

Cactus Jack 18 May 2018, 22:29


Vision occurs in the brain. Your eyes are merely biological cameras.

Your brain has the ability to correct the images you see, IF it knows what something is supposed to look like.

The problem is that it takes a lot of effort and energy. What has happened is that your brain has reprogramed itself to stop correcting the images from your eyes. Your glasses are doing the necessary correction for your brain, optically. Your brain has not forgotten the correction process, but it has become used to having some labor saving tools, called glasses.

Labor saving tools are some what addictive. You probably have some other labor saving tools you use regularly, without much thought. Your brain can go back to doing the image correction again, but it might complain some. Just stop wearing your glasses for a week or two. It may not actually take that long because it has already done it once. Curiously, it does not usually take very long before your brain learns to switch image processing algorithms in just a few minutes. When that happens, you can typically decide if you want to wear your glasses or not, on the spur of the moment.

If you have trouble believing that your brain can really does not need inputs from your eyes to produce images, consider what happens when your dream.

It would be helpful to know your complete prescription.


London  18 May 2018, 20:36

Wasnít sure how often to wear new glasses so tried full time for 2 weeks as per this site. However after trying this canít recognise faces or signs at any distance without glasses. Can this improve, as right now have gone from managing to not managing without glasses?? Can this improve? If so how long without glasses will this take. Unfortunately over last few days I canít stop wearing them long enough to see.

Weirdeyes 18 May 2018, 15:55

Just got my prism glasses to wear over my contacts. I feel like such a hipster. I also notice more light sensitivity, higher contrast and a bit more depth perception. Itís the same with my glasses which have 1.00 base in prism for each eye. The vision therapist only prescribed 0.50 base in prism for each eye. Iím stating my first day of vision therapy tomorrow.

Allie 17 May 2018, 02:29

I wrote at the beginning of April about my trials and tribulations with varifocals. I decided to get separate pairs of glasses for near and distance which I've been using for nearly a month now. It's not ideal but with my ageing eyes I don't think there is a perfect solution. I thought I'd just get a pair of glasses for reading which were essentially 2.25 dioptres weaker than my distance prescription but it turned out to be less straightforward than that as I have unusually high astigmatism and as I mentioned before my left eye turns in slightly. I ended up getting varifocals for intermediate and close up which wasn't really the intention, although as I mentioned my left eye they took much more detailed measurements of the alignment of my eyes when reading and at computer screen distance. They even let me use a pair of strong contacts so I could see where to look when making the measurements. The upshot is I have a new pair of varifocals for work which allow me to see very close when writing reports, the add is +3.00 and the upper portion is for screen distance out to about 3 feet or so. I'm a GP so I can see my computer screen well, I can see my patients' faces fairly clearly and I can see to examine them close up too. It's taken me a while to get used to this new way of seeing but overall I'm really happy. My other glasses are single vision for driving, watching TV etc. I find I just leave the new varifocals on all day in my surgery. Things beyond about 4 feet away are blurry but that doesn't matter. I then put my distance glasses on to drive home.

Cactus Jack 14 May 2018, 09:21


A glasses prescription for a person who wears contact lenses with the prescription of

R: -3.75 -1.75 120

L: -4.00 -1.25 90

Would be almost the same

R: -4.00 -1.75 120

L: -4.25 -1.25 90

The sphere correction is right on the border of glasses Vertex Distance effects requiring ANY adjustment for contacts.

Also, the Axis may be slightly different in a refraction because Toric Contact Lenses are only offered 10 degree increments, whereas glasses can have Axis specified in 1 degree increments. The CL prescription was likely adjusted to the nearest 10 degree increment from the actual Axis measurement..


Nicky 14 May 2018, 03:33


I wondered if that is the prescription on the contact lenses,

What might be the glassesís prescription:

R: -3.75 -1.75 120

L: -4.00 -1.25 90


Glass Lenses 13 May 2018, 00:35

Interesting article.

It makes me wonder about the need to accurately refract for smaller amounts of astigmatism.

Cactus Jack 06 May 2018, 18:16


Thanks. Any thing else I can help with or have not answered?


Dan 05 May 2018, 15:59

Mid 20s


Since 19 (-0.5, -0.75)

Cactus Jack 05 May 2018, 04:51


Thank You for the prescription.

Sphere -2.50 with Cylinder in the -0.25 to -0.50 range is a low to moderate prescription. Minification is not very much, but you may be much more aware of it than other people would be. I doubt high index or fancy coatings would make much difference to your appearance, but it would affect your wallet.

Most people do not notice lenses, but notice frames.

If you would like to try different lens materials, coatings or frames, without spending a carload of money, you might investigate Zenni Optical. They offer many different Indexes of Refraction and their low cost Anti-Reflective Coating (US#4.95) if I remember right is quite good. They offer excellent quality at a very reasonable price.

May I ask a few questions?

1. Your age"

2. Where you live? (country)

3. How long have you been wearing glasses?

Let us know if you have any more questions. If you decide to try Zenni, you will need your prescription, your Pupillary Distance (PD). It may not be listed on your prescription, but it is very easy to measure and we can tell you how. and a credit card.


Dan 05 May 2018, 00:13

OD -2.50 -0.50

OS -2.50 -0.25

Cactus Jack 04 May 2018, 17:00


These days, trying to guess a prescription from a picture of a person's face, is a waste of time.

There are all kinds of lenses available today. Indexes of Refraction can range from 1.49 for CR-39 plastic to 1.9 in high index glass. Lens width and coatings can affect lens appearance. Lens physical strength requirements for safety can also affect lens thickness and appearance, Edge effects (power rings) just indicate that it is likely a MINUS lens, but you can also get the same effect from pure prism. You can also get -1.00 glasses from specialist labs that are 2 cm thick, if you are willing to pay the price. It is virtually impossible to estimate a prescription or answer your question with any degree of accuracy from your picture. It is like guessing the number of small beans in a large jar.

Apparent eye size minification is caused by Vertex Distance (VD) effects. VD effects are a function of Lens Power and distance from the front surface of the Cornea to the Back Surface of the glasses lens. VD effects are part of the laws of Optical Physics. They have been around for Billions of Years, likely since the Big Bang an estimated 13.2 Billion years ago. There have been some requests for changes, but so far there has been no known response or results.

No matter what the prescription is, the closer you can get your glasses to your cornea, the less your eyes will appear to be minified by MINUS lenses. Contact Lenses offer a VD of Zero (0) and with them there will be no minification.


Sandpaper 04 May 2018, 14:25

Prescription is probably at least -4.50 probably -5.00. Not low at all.

Dan 04 May 2018, 13:04

What prescription do they look like to you?

Cactus Jack 04 May 2018, 12:40


What is your complete prescription? "Low prescription" is not enough information to provide an informative answer.


Dan 04 May 2018, 05:41

Why do low prescription glasses make my eyes look so small? Is there anything I can do to minimize the distortion? I opted for the cheap lenses. Is that the reason?


Lou 02 May 2018, 16:32

All the best

Lou 01 May 2018, 01:53

Hi Soundmanpt

You say, SPH doesn't mean distance only, it can also mean close up as well. It is used for both.

I really don't remember ever saying otherwise. As you already know, SPH (sphere) is a component of an eye prescription, and is a component of distance, intermediate and near eye prescriptions.

Maxim is right when he says that a distance sphere value can be either positive or negative. If there is no sphere value on a distance prescription, plano or zero is entered under sphere.

Intermediate and near prescriptions are distance prescriptions with a positive (+) intermediate or near addition added to the distance sphere value.

Depending on whether the distance sphere is minus, plano or positive, the intermediate and near sphere values can either be minus, plano or positive. As you already know, it is simple maths, and a case of taking the distance sphere, observing the sign and adding the positive addition.

All the best


Maxim 30 Apr 2018, 17:39


The post is WRONG!

Here's the proof:

"A distance prescription is ALWAYS written as a minus prescription" .... WRONG / INCORRECT / NONSENSE.

This should read:

a) Distance correction with myopia / nearsightedness:


b) Distance correction with hyperopia / farsightedness:


I feel every regular reader here understands this statement.

Glassesforeveryone 30 Apr 2018, 14:55

I don't believe the post below is Soundmanpt.

It's completely incorrect and the style is way off.

Soundmanpt 30 Apr 2018, 14:05

plum and Lou

Yes a plus prescription can be wore for distance, but in most cases a plus prescription in the SPH column usually is as a reading prescription or better put close up. However if the persons wears their glasses often enough or simply keeps their glasses on all the time their eyes will adjust to seeing distance as well. This is most likely what has happened to "plum" A distance prescription is ALWAYS written as a minus prescription and is meant to wore for seeing distance but once again if that person wears their glasses for reading all the time their eyes will adjust to them for that as well. Have either of ever noticed that the "over-the-counter readers" are all listed as plus powers? Usually starting out at +1.00 and going to around +3.50. SPH doesn't mean distance only, it can also mean close up as well. It is used for both.

Lou 30 Apr 2018, 13:52

Hi Plum

Thank you very much for the clarification. You wear your glasses as I thought, and very much like I used to wear mine, before my optician suggested wearing them full-time, since I was getting eye strain when I wasn't wearing my glasses.

As I expected, your prescription is a distance prescription. Generally it is people over the age of forty, who need a separate reading prescription. Usually a patient's distance prescription is written out in full and the extra they require for reading is written like you say, in the add column.

The add value is always positive, and approximately relates to age.


Going back to your distance prescription of:

OD: +1.00, -0.50 156

OS: +0.75, -0.50 180

If you were say 45 instead of 19, and had +1.00 in the add column of your prescription, you would simply add +1.00 to your distance sphere values, giving you a reading prescription of:

OD: +2.00, -0.50 156

OS: +1.75, -0.50 180

However when a reading prescription is written out in full, rather than simply given as the distance prescription with an add, there will two lines for each eye, one labelled as the distance prescription and one labelled as the near prescription.

To further complicate things, usually once the reading add gets higher, a lot of people find that they then need a lower add for intermediate work such as viewing a pc, which is described as an intermediate or inter add. When there is also an intermediate add, the near add is generally described as a near add.

Anyway, your prescription is a single vision distance prescription, as I would expect for someone who is only 19. I'm 44 and so far I also just have a single vision distance prescription.

And, in all honesty I don't think that it was you who caused the confusion.

Take care


plum 30 Apr 2018, 11:49

Hello everybody! Sorry to cause all of the confusion.

I use my glasses in class and watching TV, as they make seeing in the distance easier as well. When I first get a new prescription, the distance is a little blurry, but this always clears up within a week. I don't have to wear them too see distance, but they do make doing so much more comfortable.

I can read without glasses, but I have to make the font larger on my phone or laptop to do so, and usually end up closing one eye or squinting. I could tell I needed to wear my glasses more when I started doing this in high school. In high school I only wore my glasses during class or when using my laptop, but now that I am halfway through my undergraduate degree I wear my glasses almost all the time, as I am almost always doing work on my laptop or scrolling though social media on my phone. Even when I am not doing close work, I find my glasses helpful for watching TV, playing games, driving, and other activities involving distance vision. I noticed a significant decrease in headaches, and increase in clarity when I started doing this when I began attending college.

I'm sorry, but I don't the difference between a reading prescription and a distance one. If it helps, there is nothing written on the "add" part of my prescription. just sph, cyl, axis, and a box checked off that says "single vision". Can somebody explain to me the difference between reading and distance prescriptions? I have never heard anything about this from eye doctors, and I'm wondering if I should bring it up when I have my next appointment.

Thank you all,


Lou 30 Apr 2018, 09:20


I thought that I'd like to discuss something, considering the difference of opinion of what is going on for Plum, and the confusion regarding Caitlin on the Hyperopia and Presbyopia thread.

There seems to be a presumption that a person who doesn't wear their glasses for distance, necessarily has to have a plano distance prescription.

Say for example a young person has a +1.00 distance prescription. Although this is their distance prescription, it is pretty small, and it is perfectly reasonable in my opinion, especially if they have no astigmatism (which as we all know affects vision at all distances), that they may find it more beneficial for near tasks, and may wear their glasses basically as reading glasses. They will however differ from an older person with presbyopia, by having just a distance prescription, which technically they could wear all the time (in the case of a person with latent hyperopia, it may be a case of getting the eyes to relax sufficiently for their distance vision to clear with their full plus distance prescription, but lets not confuse the issue).

In the case of Caitlin on the other thread, she never said how old she was, but since she mentioned the annoyance of having to take her reading glasses off to look in the distance, she clearly is presbyopic.

I felt and still feel that her not needing her reading prescription for distance, doesn't necessarily mean that she has no distance prescription, in fact we knew from the cylinder values in her reading prescription, that she would have at least cylinder values in a distance prescription. What we didn't know, was her non prescribed distance sphere values. I felt and still feel that she could possibly have a small +0.50 or +0.25 distance sphere, and only a +0.50 or +0.75 reading add, but I get the response that I'm misunderstanding, when actually I don't think that I am.

The problem with someone giving a reading prescription written out in full, is that there is no indication what the non prescribed distance sphere is.

My issue is that in addition to it possibly being plano or a very small minus, it could also be a small plus possibly even up to +0.75 in a presbyopic adult, if they have no astigmatism.

With Caitlin, I honestly believe that we had no idea, only that with her reading add, her sphere added up to +1.00.

With Plum, rather than having a reading add, I think that it is far more likely that she posted her distance prescription, and she either wears her glasses for close tasks, because her prescription is pretty small, she doesn't feel the need to wear glasses full-time and wears them for close-up, as this is the distance at which she finds them more useful, or that she has a degree of latent hyperopia, which prevents her eyes from relaxing fully in the distance with her distance prescription.

Either way, to get to my long point, I'm not misunderstanding when I point out that somebody who does not need glasses for distance, could still have a small plus prescription. I honestly think that this is perfectly possible and should not be ruled out.

Sorry, I'm not trying to be argumentative, just trying to clarify the situation, so people asking for advice are not put off by replies which presume that not needing/wearing glasses for distance equates to a plano sphere for distance.

Take care


Lou 30 Apr 2018, 08:16

Hi Soundmanpt

I think that we will have to agree to disagree, mainly because at the age of 19, I don't believe that Plum will have a separate prescription for reading, rather I believe that this is her distance prescription, and being a plus prescription, she simply finds it more useful for close up tasks.

Plum also mentioned experiencing her eye issue when watching tv. Although she doesn't specifically say so, my guess is that she also wears her glasses for tv, and includes tv when she says screens. If so, I doubt that she would wear a reading prescription for tv distance. Admittedly, this part is however only me reading between the lines, and I could be wrong about her wearing her glasses for tv.

Whatever in this regard, I am pretty sure that Plum posted her distance prescription, which even if she only needs and wears it for reading, is still listed under distance on her prescription.

Surely, it is more likely that a nineteen year old will have a plus distance prescription rather than a reading addition, even if they only need and wear their glasses for close up tasks.

I would have thought that a reading addition is more likely to be prescribed if a young person has accommodation issues, or high myopia, in the latter case, bifocals/progressives being prescribed to try to slow the progression of myopia.

Plum, if you are still reading this thread, please clarify whether the prescription values you post are listed under distance on your prescription. Many thanks.

All the best


Soundmanpt 30 Apr 2018, 07:36


In "plum's" comment she says: "I wear them most of the time, I only go without them when i'm doing something that doesn't involve reading or screens basically" So she seems to make it clear that she doesn't feel like she needs her glasses for distance. My suggestion was meant that if she would rather just to be able to wear her glasses all the time bifocals would allow her to do that without interfering with her distance vision. Some people don't like constantly putting on and taking off their glasses. It's even possible that like what "Likelenses" said she may even need a weak prescription for distance.

Lou 29 Apr 2018, 23:34

Hi Soundmanpt


Soundmanpt 29 Apr 2018, 15:14


If you wear your glasses that often maybe you should consider asking the doctor to write your prescription for bifocals / progressives instead of single vision glasses. That way you can wear your glasses full time if you want or just when needed. If your eyes don't need any vision correction for distance he / she will write the top part of your glasses as being "plano" or as -0.00. And only the bottom segment would have your reading prescription. You can buy progressives for around $55.00 on line.

Since plum is only 19, I would be very surprised if the prescription she quoted isn't already her distance prescription, hence why she is able to wear her glasses most of the time already.

All the best


Likelenses 29 Apr 2018, 21:44


It sounds to me like you may becoming slightly nearsighted.

At nineteen, with the visual demands of college it is quite common.

Can you read without glasses on?

I know a twenty year old that had worn reading glasses in high school, and in the first year of college had trouble somewhat like yours.

She was prescribed a minus distance correction,and now wears bifocals.

She can read without glasses. but the doctor said that since she is accustomed to seeing close up things magnified, it would be easier to adjust.

She has had two increases to her minus distance prescription, and it is about - 2.25 now.

Soundmanpt 29 Apr 2018, 15:14


I think their is no doubt that the eye spasms you're experiencing is due to you're having changed and your glasses are too weak for your eyes now. If you wear your glasses that often maybe you should consider asking the doctor to write your prescription for bifocals / progressives instead of single vision glasses. That way you can wear your glasses full time if you want or just when needed. If your eyes don't need any vision correction for distance he / she will write the top part of your glasses as being "plano" or as -0.00. And only the bottom segment would have your reading prescription. You can buy progressives for around $55.00 on line.

Not much that you can do to reduce eyestrain except being in good lighting conditions when reading and studying and maybe try and limit how long you read and study as much as possible. Take frequent breaks to rest your eyes. That's about all you can do until you are able to get your eyes examined and get new glasses.

plum 29 Apr 2018, 14:16

Lou and Soundmanpt,

Thank you for your responses! I suppose it probably is time to have an eye exam. I have had glasses for almost 5 years, and I wear them most of the time. I only go without when I'm doing something that doesn't involve reading or screens basically. I experience the spasming feeling both with and without glasses. It hasn't been as much of an issue today, but I'm going to try and sep up an appointment for an eye exam soon. As I said though, I can't do this for a couple weeks. Any other tips for avoiding eye strain in the mean time?

I bought my current pair of glasses from eyebuydirect, and I'm still very satisfied with the quality and price. They're actually the only glasses I've had that I haven't broken within a year.

Thanks again!


Soundmanpt 29 Apr 2018, 10:09


Very simply, your current prescription really isn't that current if it is from a year and a half ago. You're attending university so your no doubt using your eyes quite a bit with extra reading and studying that you're doing not including using your phone. While you're still at university you really should be getting your eyes checked at least every year. Most likely your glasses are too weak for your eyes which is causing eyestrain. You need your glasses changed but you first need an eye exam to do that.

Being at university often times money can be a problem and glasses aren't cheap at the local optical stores. If this is the case with you., you might want to consider ordering your glasses on line. They are much, much cheaper that way. Take a look at Eye Buy Direct ( Frimoo, ( and my personal favorite Zenni Optical ( These are all good sites for getting glasses from. Zenni has a a very nice selection of glasses in your prescription for as low as $6.95. But they have several hundred for under $13.00. So with shipping and the optional AR coating ( anti-reflective) you can have great looking glasses for under $23.00.

Lou 29 Apr 2018, 01:22

Hi Plum

I believe that this is a symptom of straining to focus. How often please do you wear your glasses, and are you experiencing this with and without your glasses?

My prescription is smaller than yours, but along the same lines except for my axis values between roughly opposite to yours, at around 90. My right eye is my slightly worse eye, and when I look in a mirror without my glasses, I see my right eye tensing up (I can see the bottom eye lid moving up and top moving down slightly). This has always been the case, years before I decided to have my eyes tested, and started wearing glasses. It doesn't do it with my glasses.

I can feel my eye tensing in this way, and it feels different to the twitching of our top eye lid which we all occasionally. It feels like a tightening sensation You however say that you don't see anything when you look in the mirror. Quite possibly you are simply not doing it at the time, or it is very subtle. I wouldn't expect others to notice my right eye doing it.

I hope that this will help.

Best wishes


plum 28 Apr 2018, 17:42

hi eyescene.

im farsighted and have astigmatism, and am a 19 year old female attending university. recently i have noticed that my the muscles around my right eye feel like they are spasming quite frequently throughout the day. i have looked in the mirror and asked friends, and my eye lid is not twitching or visibly spasming. i tried cutting out caffeine and using eye drops but this is still happening, and has been for at least two weeks. this spasming feeling happens a lot when i'm using my phone or computer or watching tv, so i'm wondering if maybe its related to my astigmatism or is caused by eye strain. maybe its time to update my prescription. my current prescription is only a year and a half old though.

OD: +1.00, -0.50 156

OS: +0.75, -0.50 180

any advice? going through finals right now, so i cant see an eye doctor for a couple weeks.


NNVisitor 27 Apr 2018, 23:48


As others have stated wear them for driving a motor vehicle. The rest of the time it's up to you. If you feel that you see alright no one will be hurt by you not wearing glasses.

Maxim 27 Apr 2018, 09:16

Sorry, two typos ....

twice "you" when it should read "your".

Maxim 27 Apr 2018, 09:13

Hi London,

my advice, very similar to the advice of our collegues here:

1. Distance vision: here You can easily go without glasses, with two exceptions:

1.1. Legal requirements when driving, presumably you don't reach the vision requirements without correction.

1.2. If you are aiming towards a maximum of clear vision - please check, with the glasses on, how a fence looks, or a rooftop. Without correction, the fence might be just a grey surface, with correction you see many more details. The same with the rooftop, just a red or blus surface, or you are seeing the tiles etc. But I agree, you can watch the TV without glasses, and you don't miss too much.

2. Reading vision: your prescription describes a small amount of myopia, that means, your myopia (nearsightedness) has the function of reading-/near distance glasses. The "plus" (here I refer to Lou's remark) is calculated from you distance prescription, and in you case neutralizes (!!) the distance prescription, your reading-/near distance prescription is still very low indeed, and combined with your low myopia, is nearly zero.

So, your question, should you wear them all the time? It's still up to you, when you are not a driver.

But, take in account the legal requirement for driving, then there is no choice: all time wearing.

Lou 27 Apr 2018, 02:14

Hi London

Without being pedantic, your add will be a + add, as all adds are +.

i.e. With a prescription as follows:

R: -1.25 Sph -0.5 Cyl Axis 72 add +1.75

L: -1.00 Sph -0.5 Cyl Axis 100 add +1.75

Your reading prescription written out in full is:

R: +0.50 Sph -0.50 Cyl Axis 72

L: +0.75 Sph -0.50 Cyl Axis 100

Regarding whether or not to wear glasses full-time, I would say that you definitely need glasses for driving (and quite possibly do not meet the legal limit for driving without glasses) and other far distance tasks, and that you would also be more comfortable reading with glasses.

You also have a small amount of astigmatism, which will affect your eyesight at all distances.

Regarding your specific question, "If borderline, what tips the balance to wearing all the time", you have basically answered your own question. i.e. "I do see the benefit but still not sure as needing them full time as seem to manage without them." If you are not experiencing eye strain or headaches and feel that you can manage ok, I feel that the choice whether or not to wear glasses is up to you other than for driving.

I hope that this will help.

Best wishes


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