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Acuity and Prescription

[thread closed by administrator, post moved to Acuity and Prescription II]

Wurm 12 Jan 2002, 20:49

I have started a new thread, "Acuity and Prescription II". Please continue to post there, instead of here. This large page is eating up a lot of my bandwidth.

Also, there is a general "Vision" topic available at:

Emily 12 Jan 2002, 18:23


That's what I thought, it is a scleral buckle (done to fix retinal detachments). That would definitely make him myopic, but only by a few diopters. One thing's for sure though, you wouldn't want to go through one of those operations just to increase your myopia! :)

Lazysiow 12 Jan 2002, 17:36

I've found some fascinating articles about astigmatism that go far beyond the 2 line description at most sites - Astigmatic versus the spherical refractive error. Translation : this is actually how they apply the astigmatism correction to the lenses. - Neutralizing astigmatism with a minus-cylinder phoropter. Translation : how they test and work out astigmatism correction. This is actually part 3 of a module, I suggest you read from part 1 as that covers retinoscopy and the auto-refractor :) part 2 will walk you through the terms that will prepare you for part 3 and there's even a test at the end. Oooh :)

Dave 12 Jan 2002, 15:37


I looked it up. That is what he had to treat a retina problem.

tinyeyes 12 Jan 2002, 14:58

Forgot to mention I am in my mid-thirties and I've worn contacts for over 20 years.

tinyeyes 12 Jan 2002, 14:57


Thanks for your reply about getting accurate contact lens and glasses prescriptions. I think it makes sense to basically do as I would normally do before getting tested, because that will be the way I will use the glasses later. Maybe you're right about different doctors having different philosophies. I know the one I used to go to never said much of anything about wearing schedules, or about refraining from contact lens wear before the test. He would have me take them out when I got to the office and have my eyes "mellow out" for a few minutes beforehand.

I think what's important to me is having good vision with glasses when I get up in the morning, so I think refraining from wearing contacts the morning of the test (and getting tested in the morning) would probably be sufficient.

I do have astigmatism (here is the old RX for glasses:R -8.75-2.00 X 001, L -9.00 -.75 X 178) I really have never understood exactly what that means. But the eye doctors have always said that it is hard to correct my vision with glasses. I would say that, yes, with glasses, I feel a little nearsighted. It is more difficult to see faraway signs and faces with the glasses on. And often in the morning when I wear them, I have noticed my vision being significantly worse in one eye than the other..usually the right eye but not always. I never experience an effect like that with contacts. I suppose I should tell all this to the eye doctor when I go. Thanks again.

Emily 12 Jan 2002, 13:20


What do you mean by a "band" wrapped around his eye? A scleral buckle?

Dave 12 Jan 2002, 12:28

Filthy, Julian

Thanks for the heads-up about JJH. I'm disappointed and I must admit I took his fiction as fact. Perhaps I will eventually learn to spot these things. I trust that most of the respondents were on the up-and-up.

To all: I've once heard that an eye has three diopters of myopia per millimetre that it is "overly long". Has anyone else heard that? If it's true, an Rx like JJH claimed to have (say -44) would equate to an extra 1.5 centimetres in axial length. Do eyeballs come in egg shapes? Seems to me there was an "Anna" ID on the old site who had an Rx in that neighborhood.

One more thought (thank you all for indulging). I once coached hockey with a guy who wore fairly strong glasses on one lens only. He had good vision but there was a band wrapped around his eye that changed the shape and created the myopia (by lengthening the eye). Perhaps this is a new alternative to GOC - just kidding.

 12 Jan 2002, 12:03

Christy 12 Jan 2002, 07:50

Bruno - I got my glasses over a dozen years ago and my prescription hasn't really changed more than half a diopter. However - when I take my glasses off - things look a whole lot blurrier than they ever did before I got glasses. Maybe the truth lies somewhere in between "it doesn't" and "it does".

Emily 12 Jan 2002, 07:44


There's a lot of contraversy surrounding this topic. Some optometrists or ophthalmologists feel that wearing glasses fulltime DOES play a role in the increase of ones Rx... I think most don't, however (or at least most that I've spoken to and read about). If you do some research, you'll find that no one really knows how or why axial myopia progresses, only speculations exist (the whole nature vs. nurture debate). I believe that if you wear an Rx that is a higher than the one prescribed for you, you can induce myopia through ciliary spasm (pseudo myopia)... but that doesn't happen if you wear an Rx that was prescribed just for you. The point is, if you feel you need glasses, just wear them- what happens, happens. Oh, by the way, to make things more confusing :).. one of my friends has worn glasses since she was eight (she's now 17)... and she still has basically the same Rx she had back then- around -1 or -2, so it just goes to show you... ? I don't know how common that occurrence would be (probably not very), but I guess that's part of the confusion surrounding the topic. :) Sorry for blabbing on!

Bruno 12 Jan 2002, 05:27

Christy, I think you're not wright because i weared my glasses direct fulltime my eyes increased quick. When I was 15 I had RX -1.5 and now at the age of 27 it inceased untill RX -5. And my doctor told that it wouldn't be so bad when I did n't wear my glasses from the start.

Hervé when i was you, wear them only when you need them.

Christy 12 Jan 2002, 04:55

Hervé - No it's not true - it just feels like that because your eyes get used to relaxing while you're wearing glasses.

Hervé 12 Jan 2002, 04:31

Is it true when you wear your glasses fulltime, that your RX will increase?

Julian 11 Jan 2002, 22:57

I always thought John XXX was into GOC at both extremes...that's irrespective of whether he's real or not. He used to appear on the original EyeScene at monthly intervals I think, though not under that name.

Filthy McNasty 11 Jan 2002, 18:30

John XXX was a persona created by a sometime Eyescene regular (who admitted as much to me in private communication). I also found a post on some other site (perhaps a pediatric ophthalmology ste, I cannot remember) where JJH claimed to be a high hyperope. Nonetheless, you are right that the exchange was interesting.

Dave 11 Jan 2002, 18:24

Here is a link (to an old discussion that took place in the newsgroup a number of years ago) that may interest many of you here at Eyescene. I followed the discussion as it took place but now that I've been made aware of the raw power of google, I was able to find it again.

If you read the complete thread you'll find that John (the extremely nearsighted one) makes several interesting posts. I believe that one post is by an optometrist (William Stacy).

Rudeman 11 Jan 2002, 17:36

It doesn't matter to me whether Larissa is a fake or not.

I just thoroughly enjoy reading her posts.

They throw a little moreexcitement into my already exciting life.

Keep up the good work girl.

Alan 11 Jan 2002, 06:47

Let's move all the discussion with and "about" Larissa to the new "Vision" thread.

(Larissa, I'm sorry there is discussion "about" you. We really have no right.)


Specs4ever 11 Jan 2002, 05:48

Hey Spexfan, our posts crossed. In the event of base out prism, a person can overcome it much easier than base in. And, a person who needs base in has been forcing their eyes to overcome the base in. When they do get the base in, the prism is a bit hard to adapt to. And, i do know people that wear prism who have a minor prescription that can't go without their prism correction at all. Once you do get used to prism, it is like having double vision all the time without it.

specs4ever 11 Jan 2002, 05:44

Well, I went way back to where Larrissa first started to post. Her original postings made sense to me, and I read where she had seen 2 doctors, one of which prescribed her a minor minus increase, and a 2 degree base in prism. The second doctor prescribed a little more minus than the first doctor, but went with a 3 degree base in. This to me is consistent, as quite often the more you make a base in prism, the more minus you need. So, then I followed her story, and unless I am terribly gullible(which I know can be)I found her tale to be quite possible, and very logical. The funny stuff was thrown in by others, and while she did say that her optician told her that she could eventually jump to a 7 degree base in prism, this is not a given, nor was it prescribed.

But, all I am trying to say here is that if she is indeed a real person, instead of an internet faker, we are doing her an injustice. I respect everybodys comments here, but I do wonder why some folks seem so determined to weed out anything that is maybe not real.

spexfan 11 Jan 2002, 05:36

Larissa, I don't think you're necessarily faking these posts, but I have to agree that you're following a familiar pattern of 'fake' postings. How much prism was prescribed for you?

My girlfriend was given a few diopters of prism in her rx once. She certainly didn't have any of the trauma you're describing (and no mention of radical double vision). Her current rx has no prism at all.

I suggest you wear your old rx and get another independent exam. Ask the optometrist for little bit of correction for astigmatism - everything should be fine.

Don 11 Jan 2002, 05:03


I think you're a fake.

Rudeman 11 Jan 2002, 03:42

Larissa, what is a "looser"??

I think you meant to say loser.

Lazysiow 11 Jan 2002, 01:29

If you want to go on wearing them, its not our business to force you not to, but we care about your health too that's why we're getting so worked up. Did they tell you what would happen if you didnt get prisms? would your eyes later drift outwards or anything major like that? when you said 2 months, did he mean you only need them for 2 months to correct the Strabismus (I think I spelled it right).

After all, if you are going through this to fix a potentially debilitating eye condition later on then it's worth it, but otherwise if your eyes are wrecked just for the sake of a little extra clarity and minor headaches then it's not worth it! From what you're saying you're basically blind without them now. I still haven't broken the news to my parents to my folks about my glasses either, my mom has a real thing about eyes and glasses and would literally have a heart attack if she found out and I dont even need them full time. I can't imagine what you'd have to go through when you break the news to the parents, boyfriend, colleagues etc. That's why you should proceed slowly and get all the info before its really too late (have you tried spending as much effort to get used to your old glasses as your new ones?). My heart goes out to you :(

Specs4Me 10 Jan 2002, 21:40


Boy have you gotten a lot of stuff thrown at you over your situation. I have held back from kicking in any further comments but I really thing that the stuff is getting pretty deap.

I would offer the following for what it's worth:

1. You have gotten two opinions that were essentially the same indicating that you need these new glasses.

2. It is entierely possible that they saw something that your eyes were accomodating for that needed to be dealt with, hence the pirsm Rx.

3. If they did in deed see something that you are accomodating for, then is is just a matter of time before your eyes will no longer be able to accomodate and you would need the glasses anyway. So why not get them now and give your eyes a break.

4. If you still don't know what to do, then get references for a good "Opthamologist" and go see him/her for another corroborating opinion.

My gut feeling is that you probably need the Rx in your new glasses, that once you have allowed your eye muscles to relax from the extra work they have been doing to accomodate that you will see great, your eyes will be relaxed and rested and you won't have all the problems you have now. I suspect that this also includes being able to take off your glasses without having all the problems you have been having the last couple of days.

Anyway, follow your consceince, you seem to be a smart young lady who takes her health seriously. I'm sure you will do the right thing.

Larissa 10 Jan 2002, 17:35

Dear Guest....

You are a #anker. It's Larissa not Clarissa. Hey maybe everyone here is a fake and it's all one person! Have you ever though about that?

Sorry people, that person who is to chicken to own up who they are really got to me. What do we or I have to do to prove myself? Why do you think I'm fake? What a looser.

Thank you Geoff for you explanation. That's along the lines of what I've been told by the eyedoc. But just because I don't write every single detail of every conversation and type it down does not mean I'm a fake *guest*. What I refer to my 'normal' sight is the 'former' sight I had, which I thought was normal.

I will let you know how I come along later in the day or tomorrow. If you all think I'm fake, then let me know and I'll go away. OK.

Gee do I have to prove that I'm genuine. I think I'll ignore that comment.

email me "Guest" and we can sort out the differences there OK.

Geoff 10 Jan 2002, 16:45


Sorry youve been having such a hard time with your glasses and I am certainly not a professional but for what its worth heres my $0.02. Your eye/brain combination can compensate for a whole range of things that are not “normal” with your eyes, like when I first started wearing glasses, it seemed like the glasses made my vision worse, but actually its just that they let my eyes relax and function “normally” without having to try and compensate for the fact that I couldn’t focus right, and then once they got used to relaxing, it seemed like my vision without the glasses was worse than before I got them, but it didn’t really change, it was just because then my eyes had gotten so used to not having to compensate any more and it was much harder to make them go back to doing that again. So that’s what happened to me anyways.

I don’t really know very much about this prism thing from a vision point of view but using a bit of physics and the way you described whats happening, it sounds like your brain decided that your eyes weren’t lining up right so it told your eye muscles to pull your eyes in more to the middle so they line up but you were not even aware of it cause you’ve been like that for so long it feels totally natural, but theyre always straining and I’m guessing maybe that might have been what was causing your headaches. So now when you put on your new glasses, the prisms do the compensating instead and then your muscles don’t have to do the work so it feels like your eyes are pushing out because you are so used to feeling them being pulled in. So its like your muscles (and your brain) are so used to working in a certain way, now you change that and it takes some time for them to adjust but after they adjust to being more relaxed its way harder for things to back the way they were, what you called their “natural” state. But really it was the old state that was unnatural and their natural state is really the way they are with the prism lenses. Its almost like you have to retrain your eyes and brain. But it sounds like wearing for that time yesterday has already started the process of relaxing cause when you got up this morning they were still the way they were when you went to bed last night.

I agree with you that you pretty much have to trust what the professionals say, theres always a bad apple or 2 in every basket but like you had two different docs tell you the same thing. I know its disappointing for you cause it means you probably are going to be wearing them full time and I remember what it was like when I got so I had to wear mine full time, but in my opinion, if wearing glasses all the time means you can see better and/or with less strain then its worth it.

This is getting pretty long but I just want to say when people want to try on my glasses I let them, (Im in the –6 to 7 range) and they always say things like you must be blind or I cant see a thing with these and my standard reply is well then it’s a good thing I wear them and not you or my other line is there must be something wrong with your eyes cause I can see really great with them. But based on my experience and a lot of other people as well, you will still be conscious of them long after everybody else has totally forgetten about it. So good luck and keep us up to date with how your getting along.

Guest 10 Jan 2002, 16:39

Clarissa - You GO girl!! Go back to the eye doc and tell him you think you need MORE prism! Let's say...10 Diopters Base In each eye. That should be great! Nice and thick on the inside of the lenses! Also, tell him you want some trifocals with some Base Up prism in one eye! (This IS fiction, right!?) Are you guys buying this one?! No Dr. would put you into that much prism unless they were sure you needed it!

Larissa 10 Jan 2002, 15:02


I didn't "feel" I needed glasses in the first instance. I don't think feeling a certain way about something inclines me to think otherwise. Like say for instance someone that dosn't know of feel like they have cancer and the doc says you do. Do they walk away from it or go along with the diagnosis? I know this example is way over the top, but that's how I think.

I get a physical done once every year. Eyes, hearing and all the rest. Incidently, my hearing is down due to loud rave parties and dances but nothing to be concerned about they said. About 2% down was the figure. But I go every year because I am concerned about my health and well being. If there is a problem, i want it detected and rectified as soon as possible. I had these physicals since age 2, and I will keep doing them and my children too when the time comes to get married and have them. I think it's important. Sorry Clare if I sound rude, it's not my intent nor am I that type of person. Just wanted to let you know (and the rest) what type of person I am.

Larissa 10 Jan 2002, 14:47

Hello all,

I think it's already too late. I wore my new glasses for the most part of yesterday, about 6 or 7 hours. While everything still seemed weird, i could see one image clearly. Every now and then the image would double and then go back. I took them off when I got into bed, with the light off so I wouldn't see anything. I was hoping thatby morning that My eyes would rest and go back to their 'natural' state.

When I woke up, everything was a little blurry and double. I had to strain to see one image. I felt as if i was going cross-eyed just to look at everything. I tried going without for about half hour and no good. I tried putting my old glasses on and wore them for about half hour and still no good. I was seeing double, and if I wasn't i had to really try hard and concentrate. So I gave up. I went for my 'new' glasses.

I put them on and the strain on my eyes seemed to go away after about 5 minutes. The image was double for about 10 minutes and then went to one. I guess the eyedoc and the lady at the optical store were right. I would have to wear my glasses full time without really having a choice. Everything still looks weird, but i can see very clearly and sharply...I guess that is because of the distance part of the lenses. I tried to take them off just to see what happens. I tell you, i don't have them off for more than 30 seconds, I put them on straight away.

I guess I finally am coming to terms that I 'need' these for the rest of my life. I don't like the thought but I will cope I guess. I just don't know what I will tell everyone. Only few people saw me wearing glasses before and i didn't care or worry me because i could use them when "I" wanted to. I told my boyfriend and parents that I went to get some new glasses the otherday. They all asked why...I just told them that i wanted a variation from my old pair and have another pair. I did not tell them about my vision or that I will be wearing them full-time. They will just see me wearing them and I'll tell them that I choose to wear them and leave me alone.

One thing that does worry me a little is that people will ask to try them on. Everyone does. When I got my first pair, everyone wanted to try them on. I let them. Some would say that they saw clearer while others just said that it wasn't strong. Now, I wouldn't dare take them off to let them see through them. They will call be crosseyed or blind. I guess i will have to respond to them and say 'No'. I hope that no-one notices the new Rx that it is different from the last pair.

OK...some answers to questions and comments...

I tried to go without them this morning but it didn't work, I felt I had to put them on to see clearly and feel better, I think the damage has been done and it's too late. I wore them for 7 hours yesterday and virtually 3 hours this morning already. I can't go without them. My eyes strain and feel like they cross (even though they don't...I looked in the mirror).

Please, no offence to anyone (love you all) but I don't think any of you are professionals by trade. You can tell me from your experience, but if a an eyedoc who is a professional says to do something for your own benefit, I always went along with it. I will not change that because I believe something different. I know all about my job and I expect people to take me seriously when I say something, I do the same. Like I've said before, I already had two opinions which were nearly the same. That was good enough for me. Yeah I hate the thought of needing the glasses from morning to bed. I even wore them in the shower as I could not focus on the soap and hair gel, who'd think that I would come to this.

I'll post something later today as this ones getting long, to let you know how I'm going physically and emotionally. Thanx again for you toughts and comments, they are really encouraging.

Clare 10 Jan 2002, 12:25

Larissa - if you don't feel you needed prism before the optician recommended them don't wear them! Seems to me that you're not convinced that you need them, and there's a danger you might be coersed into wearing them because you think that's right.

If your optician can't give you a valid reason what makes him think you need them, don't do it. If you can see better with your new rx that's fine, but very different to something that's going to give you double vision when you take your glasses off.

Wurm 10 Jan 2002, 11:16

I've created a new thread called "Vision" for those who care to use it. Might be a good place to carry on with chit-chat from this thread, which some may feel is growing overlong:

Alan 10 Jan 2002, 11:14


Julian is right, beyond almost all doubt; if you are willing to be patient, you will be able to stop wearing the glasses if you decide to do that, even after wearing them all the time for a couple months. (Though it might be really difficult for a while.) I personally would absolutely not stand for the complete lack of explanation you've been given, but whatever. Prism up to 7D would be quite thick in regular plastic lenses; with high index lenses, they would still be somewhat thick, though not tremendously. Are your new glasses regular plastic, or high index?

Lazysiow 10 Jan 2002, 01:27

Actually antecdotal evidence suggests that glasses CAN "wreck" your eyes forever once you get used to them by wearing them all the time your eyes can just get "stuck" in that cilary spasm (at least thats what I think its called) and not come out of it, at least from what I've read here anyway.

I dont think I was very clear in my last post either, I meant to use your old glasses and ease your eyes back into the way they were, if you go bare eyed I suspect they'll start bugging you for the strongest correction you've tried (the prisms) so with your old glasses I think you'll be able to ease'em back with the correction in those. Please keep us posted and PLEASE don't wear the prisms anymore! sleep off the double vision or dizziness if you have to but at least try!

Lazysiow 10 Jan 2002, 01:18

:( dont give up yet. Eyes have a degree of "flexibility", and they also take a bit of time to forget about adjusting to any lenses remotely close to the prescription you need. You still have your old glasses, I think its just a habitual thing. Call in sick,take a few days off and wear your old glasses full time and see if you can force your eyes to go back to the way they were. You said that when you had them off things were a bit doubled but not completely. That tells me at least that you're not beyond hope. Also try some eye exercises like rolling your eyeballs around and rinsing them out every now and then. I found I had to do that in order to get rid of my glasses induced astigmatism :P Don't give up yet!

P.S. I got my new lenses today and finally I have proper correction, my new script is L: +50 (NO astig.), R. +50 cyl x180 -.25 . Just a minor bump up on the right eye. My left eye is adjusting fine, initially it tried to auto adjust itself to the missing astig. correction and still does every now and then (what the eye muscle is used to) but that's already becoming a bygone memory. I'm also seeing better when I take them off than before. Its kind of the same way your eyes adjust to lenses for the first time. Say you only need -.65 of correction, they can only make lenses in powers of +/-.25 say you get prescribed -.75 and your eyes just end up weakening a little more to adjust to those.

Julian 10 Jan 2002, 01:15

Larissa, don't worry - or at least don't worry so much. GLASSES CAN'T WRECK YOUR EYES FOR EVER! (Sorry for shouting but it is important to get that fixed in your mind). They may inconvenience you for a while, but if the Rx is wrong things will *eventually* go back to normal. I suggest you

EITHER follow your eye doc's instructions and wear your new glasses full time; give him (and them) a chance.

OR if you don't trust him, get another opinion as soon as you can.

Taking them off and putting them on again for short times is causing you the maximum discomfort and confusion. Maybe there's somebody around who knows enough to confirm that I'm right (or shoot me down in flames!)

Love and kisses, Jules.

Fathom 10 Jan 2002, 01:09

Larissa - If you're still having that much difficulty after giving the new glasses a good ole try for about a week, I strongly go with some of the suggestions here -- get a second, or if necessary a third, opinion. Some doctors 'get' our condition at once while others don't, and these ARE your eyes were talking about.

Hope things start rolling uphill for you from here....

Larissa 09 Jan 2002, 21:55

:(( It seems as though it's already late.

I'm comming to terms that I will maybe have to wear them full time.

I have come back from visiting my eyedoc. He checked out the lenses and said that they are perfectly made to his Rx istructions. So now comes the bad news...

He asked me my problems and I told him how I feel. He smiled and said that there is nothing to worry about. Everything about me and my eyes are healthy, they just need a little help. He put them on my face and done some testing. I could see everything very clearly when I'm looking through one lens at a time (the other being covered). I could see perfectly. But when he uncovered the other, I saw double. He told me that this may persist for a while until my eyes get used to them. I'm not to worry he said.

He also said that if I put them on, not to remove them as this will agrevate the problem and confuse my eyes/brain, and make me feel dizzy and see double.

He also said that the prism may have to go up later, that if he introduced a great big change straight away i would never be able to cope. He said that it may go to about 7D. Shit, how thick will that be? But that can wait (forever if you ask me). Sorry, just upset.

So, when i left the eyedoc, I had the glasses on (under his instructions)even though they made me see double and dizzy. I tried taking them off out of the store (contrary to his instructions) and immediatly saw double and got even dizzier. So I put them back on because I felt they made me less dizzier. I managed to get to the bus stop. I waited there for 30 min. Lucky I was sitting. As I sat there, the images started comming together, then out again, untill finally they were one. I still felt dizzy, but at least I could see clear and one image. My eyes felt weird, like they are being pulled apart. I needed a mirror to see if my eyes are actually pointing outwards because they felt that way. But none around.

The bus arrived and i got on. It seemed difficult to walk as things seemed to be a little further away than usuall, but i managed. When i got off the bus, i had about 10 minute walk to home. I felt really dizzy. I took the glasses off and bang...Everything was double, imediate headache. I quickly put them back on and it took about a minute for the image to go back to one. I then realized that this is finally it. My eyes are not normal anymore. These glasses wrecked my eyes forever.

I think that the 2 hours I wore them yesterday was enough to do it. All morning and on the way to the eyedoc the images were little doubled and i felt dizzy. Now, I'm not dizzy. I have them on while typing. I feel dizzy when I get up and walk around. I can't even look through the tops of the glasses frame everything looks double. I have to look straight on. My glasses are a smallish frame and I can see double from under them quite a lot.

I'm really upset now that I ever did this. I wish I never had gone to the eyedoc in the first place. The other glasses were fine. Now I've tried to take them off and forget it, double everything and headache. It takes about a minute for things to look clear and normal after i remove my glasses for even 5 seconds. So I guess it's too late. I will have to wear them for the rest of the day/night. Maybe tomorrow my eyes will go back to normal in the morning. :( :( Sorry for the long post.

Lazysiow 09 Jan 2002, 18:00

Larissa, I really hope everything's okay and that you haven't wrecked your eyes. Wishing you all the best

Alan 09 Jan 2002, 15:09

Emily - BCVA = Best Corrected Visual Acuity (judged by which line on the eye chart you can read with correction, unless you are legally blind)

Clare - Emily is right; people can frequently get accustomed to monovision...many people find that after a while they can suppress the blurry image enough that they don't notice it. You actually *could* have driven home like that -- I'm pretty sure your problem was not with acuity, but rather the fact that you were distracted by having an eye with blurry vision. Anyway, the benefits (for people with presbyopia) is that it's possible to both see clearly in the distance and up close without bifocals. For people who can learn to tolerate the blurriness in one eye, this works better than bifocal contacts which (I've heard) give slightly sub-par vision in both eyes for both distance and up-close vision. Certainly, having an eye that can accomodate both near and far is a considerably easier situation. But for people who need an add for reading, basically, different people prefer different things.

Larissa: I couldn't find if you ever said what the prescription was in your old glasses. But if the spherical part is different by -0.25 or -0.5, that would account for the crisper vision...and you could get that by getting glasses in the same prescription as your new ones but without the prism. I said quite a while back that questioning experts really is a good idea, and seriously, there is NO reason you should have to go through this without someone giving you a satisfactory explanation of WHY it is necessary. If you can't get a satisfying explanation, and you honestly feel like you have no problems with double vision, binocular vision (using both eyes to see), or eye strain, then you just need to find an eye doctor who gives you an updated prescription with no prism.


Emily 09 Jan 2002, 14:53

Best corrected visual acuity

Do we have two Emilys here? :)

Larissa 09 Jan 2002, 14:21

:( another day. I woke up this morning with a headache and my eye seemed to not focus together. I think the 2 hours yesterday was enough to wreck what I thought were good eyes. I had a bit of a dizzy spell getting up. I thought that i would put them on and see whethter they helped. The clarity and sharpness was there (covering one eye and looking through the other), but the double vision was still there.

I took them of after couple minutes. I couldn't make up my mind which was better. After about 30 minutes, the dizzy sensation went away and the doubling effect (without the glasses).

Some questions and comments to answer;

1) I already had 2 opinions in Rx before i got them from two different towns. They were both very similar, that is why I went to get them done. 2) My eyes are not crossed. They both look normal to me and the opinion of my boyfriend ( I asked him before i got the new glasses to make sure since some of you seemed concerned about it).

I think I will go and see the eyedoc today with my new glasses. I rang him to let him know that I don't know what's going on. He suggested to me to see him straight away, not to wear them, he wants to check that the Rx in the glasses are what Rx he prescribed. So I'm off to see him. I will catch the bus this time as I may not feel to good or he might tell me to wear them there for the test. I will be unable to drive then I feel. SO I will let you know what happens. Maybe the Rx is wrongly put on! (I hope).

Thanx for your support people. I didn't think i would need it.

Daffy- how come you want to experiment with prism lenses? I can't understand why anyone would experiment with this sort of thing or any lenses. I thought they were a correctional devise that was made popular. I don't know that much about lenses and Rx's but maybe you could do some permanent damage.

Emily 09 Jan 2002, 13:33

BCVA, what's that!

Emily 09 Jan 2002, 12:13

I think it would just take some time to adjust to it... from what I've heard, eventually your vision seems pretty much normal because your eyes naturally learn to function like that. I imagine that it's kinda the same for people who have a different BCVA for each eye... eventually you don't really notice it.

Clare 09 Jan 2002, 11:16

... but the weirdest thing is, with one contact lens it really gives you an idea of how good your uncorrected vision is! When else can you compare so directly? (only if course if your prescription's the same for both!)

Clare 09 Jan 2002, 11:14

What are the real benefits of mono vision? Today I lost a contact lens which wasn't traumatic. It was a bit odd seeing well out of one eye but not the other, and I could always shut one completely! Then I got in the car to drive home and I didn't know what to do - it was dark and my vision was obviously a bit odd. I put on a pair of glasses that I keep in the car and that was the opposite of what I'd just experienced - remember I now had one eye doubly corrected!

I don't understand how anyone can choose that! I see that, later in life, it could be useful not to need reading glasses - but I couldn't have driven home like it, so what do people do!!!

Lazysiow 08 Jan 2002, 23:50

Oh and do this as soon as possible, hopefully you might be able to get your money back too if they were wrongly prescribed if they weren't covered by insurance or a health fund.

Lazysiow 08 Jan 2002, 23:48

I really dont suggest you put them on anymore, especially after you said that you end up not being able to focus with or without them. My prescription was quite minor about one diopter but even then my eyes got "stuck" as well. Seek further help before you put them on anymore! Portia's suggestion to go to a university or opthalmic college is quite good too.

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