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Glasses Over Contacts (GOC)

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Soundmanpt 28 Sep 2017, 08:07


I would agree with "rafa" and depending where you live you might even wnt to call them and ask at what prescription you can have have your glasses made with myodisk lenses? Or use the "comment" box to request myodisk lenses.

rafa 28 Sep 2017, 02:36


I got myself a pair of myodisc glasses from Zenni. They are minus 20, which is as high as they make them at Zenni.

I actually didn't want myodisc lenses but since I order the thickest lenses (as I like them), It turns out that they only fill that sort of prescription on regular lenses with myodiscs. I'm very happy with them now.

So my guess is that if you go for really high prescriptions, Zenni might be able to do myodiscs for you. But it's best to ask them first.

juliette 06 Sep 2017, 00:59

I have posted a few times to this site. My venture with GOC has gone well. Can anyone advise where I can purchase 'Good' quality myodisc glasses? Suggestions would be appreciated

 24 Aug 2017, 08:39

Hi, probably a little off topic, but I couldn't find a more suitable thread to ask this. I would like to know if someone has experience with sclera lenses for keratoconus/dry eyes? Or does anyone know where to get them in Europe? I'm curious and would like to try it.

JC 05 Aug 2017, 15:26


I see what you mean. With your family's interest in glasses and your history of moving to a very low prescription I can see the danger in showing up with a significant prescription one day. I suppose I'm lucky nobody in my family has a special interest in glasses and they all know I am a full time wearer. And of course I'm lucky my wife knows about and accepts GOC.

While I don't make any effort to avoid wearing any particular glasses in front of them I do avoid any situation where I might have to remove them in front of them. My sister in particular knows my prescription is the same as hers as several years ago she needed to borrow a disposable lens from me. It would be awkward if she suddenly saw me with much worse vision then herself.

Maxim 05 Aug 2017, 04:25

PS to JC:

After the OP, I have not only the two varifocals (bought one month and 8 months after OP, not satisfied with the concept, always blurry zones) but as well:

1 pair bifocals PC and near vision (that is +1.25/+2.75 against distance vision) - bought them 2 weeks after OP -

1 pair bifocals distance and near vision (o.oo / + 2.75) - superb from Zenni, at a total price of 40,00 $ approx., 20,00 the frame, less than 20,00 $ the bifocal lenses with antireflex - superb quality and vision !! bought 4 months after OP

1 pair for distance vision, sunlight absorption 80 per cent, brown, for driving - bought them 2 weeks after OP -

Maxim 05 Aug 2017, 04:16

to JC:

Thank you very much for your friendly remarks and comments.

My real prescription was until May/June of 2016:

R + 4.00 / - 1.75 cyl A 85 degrees,

L + 3.25 / - 1.25 cyl A 110 degrees

with an add of 2.00 or 2.25 etc.

In early summer of 2016 I had the cataract OP, and I paid for the state-of-the-art measurement, and so, after the cataract OP (I did not pay for tailored-to-measure IOLs), only the astigmatism is more or less uncorrrected.

My new prescription is (slightly modified over the months, and slightly different in three different shops - I have an appointment for 'objective' measurement):

R + 0.50 / - 2.00 A 103 degrees, and

L - 0.50 / -0.50 A 102 degrees, and, of course, an add for near vision.

This is really near nothing (especially in the left eye), but however, I enjoy wearing glasses, because there is more sharpness in the image. An example only: a car registration plate on 50 yards/meters: without glasses left eye blurred, right eye nothing or totally in blur.

With glasses: can read the registration plate, left eye superb, right eye, fairly good. Why should I NOT wear glasses??? I prefer seeing WITH glasses!

All of my family are glasses lovers and glasses experts of their own. My wife wished desperately to wear glasses, when she was young and did not really need them. She loved her children wearing glasses, and me as well. Everybody is trying the other's glasses, and everybody in the family knows about the other family members' prescriptions.

When I first had new glasses affter the cataract OP, I told my son (now 31 yrs) that my prescription now was near to nothing, and he took my glasses, looked through them and then confirmed, what I had said.

So, quite frankly, do you agree, that they might be on the alert, if I would show up with my -5.00 prescription glasses over CLs?

By the way, before the OP, I wore -8.00 over +5.00 CLs. And now, my +6.00 glasses are a pair of reading glasses, when my eye was at +4.00 etc before the OP. These are the only glasses, were they don't ask - I can also use glasses before the OP (+4.00 etc) from before the OP as readers, but they are for very, very close vision now!

I'm planning for some nice Zenni bifocals with -7.50 etc, as +8.00 CLs are the maximum power to buy at reasonable prices (30-40 cent each) as throw-away lenses from , but I am also planning for more glasses around my real prescription (variation in power, cylinder, a bit of prism etc., and bifocals for distance and near, bifocals for PC screen and near - this is very important -). I have two pairs of varifocals now, but I really don't like them, everything is moving uncontrollable, and they irritate me when driving.

I feel better for driving with a -5.00 GOC-combination, than with varifocals in my real prescription!!

The best wishes and greetings,


rimpopper 04 Aug 2017, 15:42

Sallust: The advice you're getting is solid. Here is the information from my spreadsheet for someone with emmetropic eyes:

For emmetropic (normal) eyes here are the required eyeglass refractions; as you can see, VD does not matter until you get to +10 and beyond; calculations for +2, +10 and +20 contacts are included.

+2 contact .012 VD -2.05 (-2.00) -2 / (1 + (.012 x -2)) = -2.05

+2 contact .013 VD -2.05 (-2.00) -2 / (1 + (.013 x -2)) = -2.05

+2 contact .014 VD -2.06 (-2.00) -2 / (1 + (.014 x -2)) = -2.06

+3 contact .012 VD -3.11 (-3.00)

+3 contact .013 VD -3.12 (-3.00)

+3 contact .014 VD -3.13 (-3.00)

+4 contact .012 VD -4.20 (-4.25)

+4 contact .013 VD -4.22 (-4.25)

+4 contact .014 VD -4.24 (-4.25)

+5 contact .012 VD -5.32 (-5.25)

+5 contact .013 VD -5.35 (-5.25)

+5 contact .014 VD -5.38 (-5.25)

+6 contact .012 VD -6.47 (-6.50)

+6 contact .013 VD -6.51 (-6.50)

+6 contact .014 VD -6.55 (-6.50)

+7 contact .012 VD -7.64 (-7.75)

+7 contact .013 VD -7.70 (-7.75)

+7 contact .014 VD -7.76 (-7.75)

+8 contact .012 VD -8.85 (-8.75)

+8 contact .013 VD -8.93 (-9.00)

+8 contact .014 VD -9.01 (-9.00)

+9 contact .012 VD -10.09 (-10.00)

+9 contact .013 VD -10.19 (-10.25)

+9 contact .014 VD -10.30 (-10.25)

+10 contact .012 VD -11.36 (-11.25) -10 / (1 + (.012 x -10)) = -11.36

+10 contact .013 VD -11.49 (-11.50) -10 / (1 + (.013 x -10)) = -11.49

+10 contact .014 VD -11.66 (-11.75) -10 / (1 + (.014 x -10)) = -11.66

+11 contact .012 VD -12.67 (-12.75)

+11 contact .013 VD -12.84 (-12.75)

+11 contact .014 VD -13.00 (-13.00)

+12 contact .012 VD -14.02 (-14.00)

+12 contact .013 VD -14.22 (-14.25)

+12 contact .014 VD -14.42 (-14.50)

+13 contact .012 VD -15.40 (-15.50)

+13 contact .013 VD -15.64 (-15.75)

+13 contact .014 VD -15.89 (-16.00)

+14 contact .012 VD -16.83 (-16.75)

+14 contact .013 VD -17.11 (-17.00)

+14 contact .014 VD -17.41 (-17.50)

+15 contact .012 VD -18.29 (-18.25)

+15 contact .013 VD -18.63 (-18.75)

+15 contact .014 VD -18.99 (-19.00)

+16 contact .012 VD -19.80 (-19.75)

+16 contact .013 VD -20.20 (-20.25)

+16 contact .014 VD -20.62 (-20.50)

+17 contact .012 VD -21.36 (-21.25)

+17 contact .013 VD -21.82 (-21.75)

+17 contact .014 VD -22.31 (-22.25)

+18 contact .012 VD -22.96 (-23.00)

+18 contact .013 VD -23.50 (-23.50)

+18 contact .014 VD -24.06 (-24.00)

+19 contact .012 VD -24.61 (-24.50)

+19 contact .013 VD -25.23 (-25.25)

+19 contact .014 VD -25.89 (-26.00)

+20 contact .012 VD -26.32 (-26.25) -20 / (1 + (.012 x- 20)) = -26.32

+20 contact .013 VD -27.03 (-27.00) -20 / (1 + (.013 x -20)) = -27.03

+20 contact .014 VD -27.78 (-27.75) -20 / (1 + (.014 x -20)) = -27.78

+21 contact .012 VD -28.07 (-28.00)

+21 contact .013 VD -28.88 (-29.00)

+21 contact .014 VD -29.75 (-29.75)

+22 contact .012 VD -29.89 (-30.00)

+22 contact .013 VD -30.81 (-30.75)

+22 contact .014 VD -31.79 (-31.75)

+23 contact .012 VD -31.77 (-31.75)

+23 contact .013 VD -32.81 (-32.75)

+23 contact .014 VD -33.92 (-34.00)

+24 contact .012 VD -33.71 (-33.75)

+24 contact .013 VD -34.88 (-35.00)

+24 contact .014 VD -36.14 (-36.25)

+25 contact .012 VD -35.71 (-35.75)

+25 contact .013 VD -37.04 (-37.00)

+25 contact .014 VD -38.46 (-38.50)

JC 04 Aug 2017, 14:56

Maxim: If I understood correctly you do wear glasses with a real prescription when not doing GOC? May I ask what your actual prescription is? If so then if you get GOC glasses with the same frame I don't think you have to worry about your family catching you. My own glasses are -4 and I regularly wear -9 and nobody can tell the difference -- even my wife who knows that I switch between the two. I even showed up with +5 glasses in front of her and she never saw a difference, which gave me confidence to wear them in front of other people with whom an explanation would be more complicated then with her. Outside of our community and eye care professionals people just don't pay attention to such things. I also would be very surprised if anyone other then an ECP noticed contacts under glasses.

Maxim 04 Aug 2017, 13:01

A small amendment: I regularely doing both, hyperop and myop simulation, with +6.00 or - 5.00 glasses.

Just three days ago, I did a 300 miles car ride plus customer talks with the -5.00 glasses and + 5.00 CLs on the eyes (this is the deviation, the exact values are based on my actual prescription.

One remark only: I feel, that the contact lenses on the eyes are much easier to detect with plus glasses, as they have a substantial magnifying effect. With the +6.00 glasses, this effect might be an estimated 150 percent.

With glasses for myopia, this is the opposite effect, the eyes are an estimated 60 percent in size with -5.00 glasses.

If somebody would ask me, why I am wearing glasses PLUS contact lenses, I would just say, that the lenses are soaked with an antibiotic medication, this is my idea at least.

My experience is, that walking and driving seems to be easier with the minus glasses (-5.00), and more difficult with the plus glasses. Until now, I have been driving the car without problems with the minus glasses, but I never used the plus glasses for driving (with one exception many, many years ago from London to Manchester, with +7.00 then). The plus glasses I have been using in town, in the subway or for many, many hours in long distance trains. I always forgot after minutes only, that I am wearing glasses, it's quite natural for me, and I have to be careful not to return to my family home still wearing those "odd" -5.00 or + 6.00 glasses - nobody at home knows about my 'obsession'.

I had started GoC when I was studying business, especially international business. As a student, I wrote to companies in Hongkong for CL samples and glasses samples, pretending I would act on behalf of European companies interested in business with these objects. Sometimes I bought glasses with lenses, complete for less than a Dollar per pair, when our companies had already trade relations with them and sold for 50 or 100 Dollars. Even Zenni is not really cheap, as Chinese exporters sell nowadays as cheap as 20 cent per standard lens.

NJ 04 Aug 2017, 10:05

Sallust, the others gave you good advice. I will only add a couple of thoughts. First, if you have no particular preference for plus or minus glasses, go with the minus glasses because, for a given prescription strength, they are easier to wear. This is especially true for high prescriptions, where strong plus lenses limit your vision in ways, mostly peripheral vision, that no amount of practice will reduce. Minus lenses don't really do this.

I'm not sure that all the 'experts' here (none of us a really experts) have experience in GOC, but the prevailing wisdom seems to be to start with weaker scripts and work up. While that might be easier in some ways, it's also expensive. My experience, for what it's worth, was to start with +20 glasses right out of the gate. It took several weeks to get used to them, but I did. The high minus glasses I tried took much less time for me to get used to. YMMV

Cactus Jack 04 Aug 2017, 07:59

Thanks JC,

You have been paying attention and the information you provided Sallust is excellent.


We can help you, but I have a couple of questions and suggestions.

1 Where do you live? I need the country because it affects my suggestions.

2. What is your occupation. GOC suggestions are affected by your visual environment.

.Initial suggestions.

1. You need an eye exam. If you have a refractive error, I suspect it will be small. Your actual complete prescription is the starting place for GOC.

2. Before getting an eye exam, you need to do two things:

A. Read "how to Study for an Eye Exam". I think you can find it here or on the Vision and Spex site. IF you cannot, I will re-post it here.

B. Do the simple home refraction test. That will give us an idea of your approximate sphere refractive error, but it cannot provide any real estimate of any Astigmatism.

If you do the above, that will help determine the symptoms or complaints to mention to the Examiner the you go for the exam. Once we know your actual refractive error (is any) we can suggest what to do about finding out two very important things, what Base Curve (BC) and the Diameter (DIA) you need in contact lenses. Soft Contact Lenses are pretty forgiving, but if they are too tight or too loose, they will be uncomfortable to wear and potentially damaging to the Cornea.

Please be aware that GOC is NOT and inexpensive endeavor, but once you get past the initial stuff listed above, the expenses are not ridiculous, unless you do it wrong. Whatever you do, DO NOT buy existing glasses with the idea of finding contact lenses to make them wearable. That rarely works because of the possible difference between your Cylinder and Axis (if any) and Cylinder and Axis in the glasses.


JC 04 Aug 2017, 06:53


Here are my personal experiences at different correction levels. Your experience will be somewhat different then mine for a few reasons. First I am 37 and you are 19, which means I will have less accommodation available and hyperopia will have more of a bite. Secondly I am naturally nearsighted around -4. As Cactus Jack puts it this means my brain already has been programmed to see with minus glasses and I don't notice effects you might. My brain is not programmed to see with plus glasses meaning what I see is likely exaggerated.

+5 glasses: When first pitting in the contacts everything is very blurred, but within maybe 20 seconds or so my distance vision adapts fairly well. Without glasses in typical indoor lighting I can see distances okay, but it takes a noticeable concentration and effort. Reading is mostly not possible unless the text is large. In bright outside lighting after a while I can almost forget my distance vision is impaired. Reading might be possible with great effort, squinting, and probably a headache. With glasses everything is clear of course, and much bigger then what I am used to. I have to be careful on steps because they are actually smaller then they appear to me. The apparent motion when I move my head is not what I am used to and this sometimes causes a little motion sickness.

-4 glasses: I can not see distance objects clearly nor making out any writing more then a foot or so from me unless it is very large. I can easily identify blurred objects and most people wouldn't know I am hindered unless I had to read or identify a person from a distance. I can not read a book or phone from a "normal" reading distance, but I don't have to bring them so close as to be noticed by most people. If I were to try to read a computer screen I would be leaning in close enough that anyone around me would know something is up. With glasses I can not really give you a good idea of what it is like as this has always been my normal reality.

-9 glasses: Everything is very blurred regardless of distance. I can recognize most large objects by color and shape but smaller objects (like glasses for example) might be hard to locate unless I am quite close to them. In bright daylight I can walk around and navigate well, but at dusk or nighttime I feel helpless. To read anything I will hold it so close to my eyes, possibly closing one of them, that anyone around would immediately know I have a serious vision problem. With glasses again I can not give you a great description as this is normal for me, other then to say everything will be a little smaller and it may be harder to make out small text at a large distance due to the size rather then the blurriness.

JC 04 Aug 2017, 06:11


Some of resident experts here, notably Cactus Jack, will be able to help you out with calculations, power suggestions, etc. The first step will be to get a contact lens fitting.

As far as your decision between minus and plus glasses goes, that of course is up to you by my suggestion would be plus contacts and minus glasses. You said with plus glasses you would limit yourself to around +5. Since you are 19 you should still have substantial natural accommodation, which means when you wear minus contacts without glasses to simulate hyperopia your eyes will neutralize a great deal of the power themselves. Yes when you first put them on your vision will be blurred, reading will be difficult if possible at all, and you might get eye strain and headaches. But all in all you will likely be able to adapt and see okay. If you go the other route and choose plus contacts to simulate myopia then without glasses there will be nothing you can do to see better other then get close to objects or wear glasses.

Our experts will also warn you about starting with too high a prescription. Since you have never needed corrected lenses going from nothing to strong glasses could be too much in one step. Listen to what they say, they are experienced and have helped many of our members achieve what they have been looking for.

Best of luck.

Sallust 04 Aug 2017, 03:55

I've contemplated GOC many times but never actually indulged beyond wearing some drug store readers briefly. I'm 19 so there is a bit of an error margin to work with, luckily. I had my eyes examined last several years ago and I had 20/20 or near 20/20. Even if I could have gotten glasses they would've been a miserably paltry -.5D or so, ones wich I would be ashamed to wear.

So I've got a blank slate. I've been lurking around for qiite a while and am familiar with the realities and limitations.

Here are some of my questions:

1. I am not sure which would be more satisfying, plus lenses or minus lenses. I appreciate both, but plus starts heavily distorting around 5/6D and minus takes until upwards of 10D before the specs begin to look strong IMO. (I'm leaning towards plus specs, minus lenses, unless there is an issue with that.)

2. I don't know the calculations, so a couple pointers and tips would be nice.

3. more about how it looks to be hyperopic without with and without correction, and if it is at all possible to get a amblyopic effect simply through two different Rxs.

4. I've been a glasses admirer for years, but never a wearer, so just general thoughts on how to choose an Rx that is satisfying both in the mirror and behind the lenses.


Davey 01 Aug 2017, 00:59

Thanks Cactus Jack.

Cactus Jack 31 Jul 2017, 21:58


I believe your GOC combination has more MINUS than is required and you are Over Corrected. You did not mention your age, but I suspect you are compensating for the excess MINUS, by using your Ciliary Muscles and Crystalline Lenses to add some PLUS internally.

There is an interconnection between your Focus Control System and your Eye Position Control System that causes your eyes to converge when you try to focus close. The systems do no know if the additional PLUS is for focusing close or you are compensating for over correction, and your eyes try to converge or cross and you see double.

I will help you with the calculations, but I need your age, occupation, and your COMPLETE actual prescription.

It is subject to revision, but a "back of an envelope" calculation indicates that you have about -2.25 diopters too much MINUS in your GOC combination. If you are young enough, you should be able to deal with the extra -2.25. The double vision might go away if you can learn to not respond to the over correction, perhaps with some exercises. Or, you can get prism (probably Base Out) in your glasses. You might be able to find out how much prism you need by doing the Simple Prism Test described on the Vision and Spec' website.


Lurking 31 Jul 2017, 20:15

Given the current topic, I figured this would be good time and thread to share my recent and very first time with GOC with high plus glasses.

My real rx is -4.00, the contacts are -20.00 and my glasses are +12.00. VERY exciting from my perspective, with only 2 minor problems that I hope improve with time. First, I think I may have gotten contacts that are a diopter or so too strong because seeing close objects can be a real challenge.

The other issue a bit more annoying. With my contacts in and glasses on I can see quite clearly as long as I keep one eye closed or else I see double. One of my eyes even crosses. Will this go away after some time.

Cactus Jack 31 Jul 2017, 08:29


I think you should start with less than +18, but here are the suggested numbers.

Your current prescription:

R Sph -0.50 Cyl -0.25 Ax 130 Add 2.50

L Sph -0.50 Cyl -0.50 Ax 25. Add. 2.50

Desired Glasses Sphere: +18.00

Estimated Vertex Distance; 12 mm

18.00^2 = 324 /1000 = 0.324 x 12 = 3.89

Vertex Distance effects of PLUS glasses are increased at the Cornea. Therefore, the effective power of the Glasses at the Cornea are:

+18.00 + 3.89 = +21.89

Your current Sphere “eye power” is +0.50 (reverse of the -0.50) for a total of +22.39.

Theoretically, you will need -22.39 contacts. However, there are two complicating factors.

One: You probably can’t get contacts in 0.25 increments. You might be able to get either -22.00 or -22.50, but I suspect it will not be easy or inexpensive.

Two: At 57 you have very little accommodation. That means that you cannot internally add any compensating PLUS. That means that the GOC combination needs to be pretty close or maybe a little on the PLUS side (IOW the -22.00 contacts. Less MINUS is more PLUS). Because the VD effects are significant, you may be able to compensate by adjusting the glasses slightly.

Please remember also that GOC at high prescriptions is a very inexact science and there are no guarantees, ever.

Your GOC glasses prescription with the -22.00 contacts needs to be:

R Sph +18.00 Cyl -0.25 Ax 130 Add 2.50

L Sph +18.00 Cyl -0.50 Ax 25. Add. 2.50

I suggest, in addition to site down when you try the combination, that you take some motion sickness pills a half hour before trying them. At alternative is having a container handy in case you have motion sickness because of the radical difference between what your eyes perceive and what your semi-circular organs sense.


Neville 31 Jul 2017, 05:34


You'll love the interchange from high minus to high plus GOC. High plus are difficult but the challenge will give you the desired buzz. Tip, sit down for a while after putting on high plus glasses and orientate yourself.

Daey 31 Jul 2017, 01:21

My Rx

R spy -0.50 Cyl -0.25 Ax 130 Add 2.50

L Sph -0.50 Cyl -0.50 Ax 25. Add. 2.50

Davey 30 Jul 2017, 13:33

I,m 57 years young I live in the U.K. I,m thinking of +18.00 glasses as I think this the max strength I can get at a reasonable price off the inter web., I would love to meet up with other GOCers, could we perhaps have aGOC wearers badge"

Davey 30 Jul 2017, 13:29

Hi Cactus Jack, I don't have my prescription to hand until tomorrow but I did use the old calculator years ago to get into -27.50 glasses with +20.00 contact lenses which I wore straight away with no problems, as the years have passed the glasses are probably -1.00 diopter too strong as I move them down my nose a little bit for distance.

Cactus Jack 30 Jul 2017, 11:57


It is an Excel file, I have misplaced the link, but many people have stopped using it in preference to doing the calculations by hand. GOC is not a very exact science, particularly when there are significant changes between the actual prescription and a GOC combo. High prescriptions are very touchy because of very significant Vertex Distance effects. Doing the calculations by hand helps you get acquainted with the underlying optical principles.

We will be happy to help you with the calculations, but we need to start with your Actual complete prescription, your age, where you live, and your target glasses prescription.

Vision occurs in the brain, your eyes are merely biological cameras. Significant changes in prescription usually means that your brain has to learn how to process the new images. With rare exceptions, most people with a natural high prescription have learned how to process the images delivered to the visual cortex gradually, over a period of years. For that reason, it is best to start GOC with a small change and work up to your target glasses prescription.

That does not mean that you cannot start with a big change, but if not done carefully, it can be a hazardous experience, particularly going to a significant PLUS prescription. Loss of peripheral vision can mean missed curbs and stair steps. Also, there can be significant changes in apparent speed of motion when you move your head, which causes motion sickness.

Please let us help make your GOC adventures, pleasant ones.


Davey 30 Jul 2017, 09:51

Hi all, does anybody remember a calculator somewhere on here that calculates the contact lenses you need for GOC when you input your prescription and your glasses strength, I fancy having a change to strong plus lenses instead of my minus lenses, thanks.

Chino 27 Jul 2017, 08:00

This message is for David. I sure hope that you're still reading these. When you had your IOLs implanted, did the doctor also perform a peripheral iridotomy/iridectomy? If so, have you had any issues/problems from that? Any visual disturbances or artifacts as a result of that procedure?

I had read of someone else who had an iridotomy and was experiencing some annoying effects from that. I just want to be absolutely sure that I want to go through with this. I'm probably going to take the leap in the next 7 or 8 years.

Many thanks,


Cactus Jack 26 Jul 2017, 14:16


She is used to wearing Low Plus glasses and wearing -7.75 glasses is a change of nearly -10 diopters. That is a much larger change than wi typically suggest. Her brain has to learn how to deal with the smaller images on her Retinas.

It is possible that the GOC powers need to be adjusted. Unfortunately, VD effects with _7.75 glasses are only 0.06 diopters per mm, which means that moving her glasses closer or further away from her eyes do not have much effect, but it does have some.

Can she move the glasses closer to or further away from her eyes and detect any difference in her distance vision? Which works best?


Mask 25 Jul 2017, 00:46

Hi she has had lenses for 10 years

The problem she has is that it's hard to walk with goc

She finds it difficult with distance

When she walks

She has no problems o drive a car or watch tv mm

Sparky 24 Jul 2017, 21:00

Hi cactus jack .the new prescription I posted is correct .no cylinder this time.

Cactus Jack 24 Jul 2017, 17:09


The numbers seem pretty close to what I calculate.

Can you describe what she is experiencing with the GOC combination. She could be experiencing problems with the contact lenses. Typical problems are dry eyes, poor fit, and / or low oxygen transmission.

Has she worn contact lenses before?


Mask 24 Jul 2017, 13:50

Hi would like some help with lenses and glasses for my girlfriend

she has

L +2,00 cyl -0,75


add + 1.50

H +1.50

add + 1.50

Goc +8.50 lenses



Cylinder -0.75

Axel 100

ADD +1.50


ADD + 1.50

But she does not think it works well

What should I change?

Cactus Jack 24 Jul 2017, 10:10


The Right Eye Sphere is very close to my calculations, but I think the Left Eye needs to have a bit more MINUS, -9.50 or even -9.75. You did not indicate any Cylinder in the recent prescription, but the -0.25 of cylinder in the glasses you ordered should not cause much problem. Is the new subscription you posted, your complete prescription?


Sparky 24 Jul 2017, 01:18

Hi guys .please could you guys advise.I have bought + 12 contact lenses and glasses are L-9.25 -0.25×30 .R -10 -0.25×30.I don't get the best vision w8th these glasses.I just got new glasses from specsavers .new prescription .R+3.25 L+3.50 add +1.25 .please advise what strength glasses to buy to use the +12 contact lenses.also I like to try -5 or -6 glasses .please work out the combo for this .thanks in advance.

Cactus Jack 21 Jul 2017, 09:53


One thing we often suggest is that you find an understanding ECP who will help you do very high GOC. The world is changing and GOC is becoming more common. Some of the younger ECPs are understanding and are willing to help you.

Properly done GOC is NOT harmful and can satisfy a deep psychological need.


Cactus Jack 21 Jul 2017, 09:49


Regrettably, I don't have a good source of contact lenses that don't require a prescription. There was a source in Vancouver, BC, Canada, that I used and recommended, but they changed their policy a few years ago.

Perhaps some of our members can suggest a reliable source that will ship anywhere in the world.

You might also look back on this threads. Your question is almost an FAQ.


TyrionLannister 21 Jul 2017, 09:05

@Cactus Jack.

I already used color contact lenses.

Please tell me from where i can buy +16 online contact lenses

Cactus Jack 21 Jul 2017, 08:58

Tyrion Lannister,

You seem very determined to jump into the deep end of the ocean/pool before learning to swim. Of course people do it and you hear about their "adventures" on the evening news.

On 5 June, Specs4ever posted this paragraph:

The contact lenses would be +16.00 for the sphere and there is no cylinder or axis. You should have your eyes checked by a doctor to see if you can get a pair of contact lenses with no prescription in them - with the excuse that you want to change your eye color or something like that. Contact lenses come in a base curve(BC) and a diameter (DIA) and should be measured by an eye care professional to make sure you do not damage your eyes by wearing contact lenses that do not fit properly.

Soft contact lenses are pretty forgiving, but they need to have a Base Curve and Diameter to fit the curvature of your Cornea. Your Cornea is living tissue, but it has NO BLOOD SUPPLY. The Cornea gets its Oxygen from the air and Oxygen and nutrients from your tears. Contacts are supposed to float on a constantly refreshed film of tears. If contacts don't fit properly, the Cornea will be starved for Oxygen and nutrients and be uncomfortable and possibly dangerous to wear.

Getting the color change contact does two things: 1. you find out the BC and DIA and 2. You get instruction in how to care for the lenses and insert and remove them. Both are very good to know. The first time you insert a contact lens, you have to overcome the natural aversion to sticking your finger in your eye. Your finger does not actually touch your Cornea, the contact lens does. Imagine the panic when you discover that you don't know how to safely remove the contact lenses, particularly if they won't come out. It is actually pretty easy, but you have to know how to do it.

I don't recall if you said where you live (country). That is important information because suggestions can vary depending on where you live.


TyrionLannister 21 Jul 2017, 07:56

can anybody please suggest me an online store(for international customers) ,where i can order +16 contact lenses

Linuxer 14 Jul 2017, 05:38

JC :

Pocket Darkroom lenses

JC 13 Jul 2017, 07:01

I just got solar viewing glasses for the upcoming eclipse in the US, and when wearing them looking at anything other then the sun your vision is completely blacked out. That made me think about blind simming, which is something you rarely read about on this forum. I don't think it is something I would be interested in doing, but I'm curious if anyone here has done it with contacts and what kind of lenses you used. What was the effect like -- do any available lenses only give a filtered light sensation or are there any that give a complete blackout?

Lurker 09 Jul 2017, 01:33

That place looks like great place to get contacts. However, I don't think accept any orders from the US.

GOCer 07 Jul 2017, 08:19

Once you've tried myodiscs or GOC'ing at this sort of level (-14 and up), you'll never want to go back - I certainly haven't and have a load of glasses now with prescriptions up to -12 that I barely use such is the buzz of being a part time high myope Juliette - you will certainly enjoy it.

BTW, I looked at the site you linked and it seems a LOT more expensive than the one I've used - - no prescription required, very high prescription contacts available with no questions asked and same day collection also available in the U.K!

juliette 07 Jul 2017, 02:38

Hello Soundmanpt & CJ,

Thank you for your advice again to increase the strength of the glasses further. I will follow the proposal you have given, & update you when I start with the new combination. If all goes well I would at a later date like to try some myodiscs, but I don't know what increase I would need to get this type of lense? this is more for fun, but who knows. The whole experience is rather addictive, & as I have said before, it gives me a good feeling of feeling self assured. Comments by family & friends are all positive. Monthly lenses up to +20 can be obtained from at discounted prices.

Thanks to you both for your supportive advice.

rafa 07 Jul 2017, 01:39


Yes, I remember your story, as it seems like a dream story for many of us here, being able to GOC all day with the support of your significant one.

I was wondering, what was the reaction of your friends and your relatives as they saw you move from moderate plus glasses to very strong minus glasses? Did they notice? I remember you mentioned you told a friend of yours that you were actually GOC'ing, and she seemed interested in doing that herself. But what about the rest? Has anyone picked up on it?

cactus Jack 05 Jul 2017, 18:21

Oops, that last post was from me.


 05 Jul 2017, 18:20

Thanks Soundmanpt. That would have been my first question and I appreciate your helping out.


Based on your prescription of

OD +2.50, -.25 x 140 add +3.00

OS +2.50, -.50 x 40 add +3.00

It is obvious that you do not have much accommodation remaining. That means that we must be more careful about choosing the combo. You asked for -12.00 glasses, that results in a contact lens prescription of +12.75, which is not available because contact lenses above about +/- 8 only come in 0.50 increments. I would suggest ordering glasses with the following prescription:

OD -12.25, -.25 x 140 add +3.00

OS -12.25, -.50 x 40 add +3.00

and order +13.00 contact lenses.

Please remember that GOC is NOT an exact science and there are no guarantees. I suggest considering ordering some very inexpensive single vision glasses to try with the +13.00 contacts and see if you like the results. If they are satisfactory, then order bifocals or progressives in a nice frame.

Please let us know the results.

Remember that your actual +2.50 prescription complicates GOC as you go higher on top of the complications caused by simply going to very high prescriptions.


Soundmanpt 04 Jul 2017, 09:03


Glad to see that you are so happy doing GOC on an everyday basis. Being able to wear stronger glasses really seems to have provided you with a new self confidence. I researched back and found your earliest post in here and it was on November 29th 2016. Your partner wears strong glasses and you wanted you both wanted your glasses to look as strong. Cactus Jack provided you with the proper combination which I assume is what you used for your contacts and glasses. I am going to post your actual prescription because i'm certain that would be the first thing Cactus Jack would need in order to recommend the proper combination for stronger glasses.

OD +2.50 -.25 140 / OS +2.50 -.50 40 add +3.00.

You also mentioned that you had a friend that was so impressed with your glasses that she also wanted to do GOC Her actual prescription was around -1.50. has she started wearing GOC? It has gotten a good bit more difficult to order contacts. Where do you get your contacts from?

gocer 04 Jul 2017, 03:48

It's a bit of trial and error Juliette, it depends what your natural accommodation is like as my eyes can accommodate glasses from -14 to -20 wearing +12.5 lenses but of course I have to have the glasses half way down my nose to allow for this. I think this is referred to as vertex, i.e. the distance between your eyeball or in this case, the contact lenses, and the glasses.

I have just got a couple of pairs of -18's and yesterday picked up some +14 contacts from my local optician and wore them for about 8 hours yesterday then a couple of hours this morning. Despite never having tried this combo before it worked like a dream and felt incredibly natural. I even managed to drive for about 45 minutes to the shops and it felt no different to being bare eyed so for those that say you need to feel you way into and gradually move your way up I would say do what YOU feel comfortable with as for doing GOC with -9 glasses now feels incredibly boring!

As you are increasing by -3 diopters I wouldn't increase your contact lenses by +3 as my above maths showed I went from a +12.5 with -15 glasses to +14 with -18 glasses and it worked perfectly. I would suggest you increase by +1.5 diopters and see how you go.

juliette 04 Jul 2017, 00:41

At the end of last year I came across this website by chance. With the help of many, & the support of my partner I was able to do GOC to realise my goal of wearing powerful minus glasses. I started with -9, & from the day, I started, I have worn these glasses all day, & never returned to my previous glasses. It has not been at all difficult except some dizziness the first couple of days. I find my vision with the combination is exceptional, & has never been so clear & precise.

I love the bold, assertive look wearing them, & feel good with them.

I would now like to go to a stronger power to increase further the look. I was thinking of going to -12. The flat front lenses look very nice. I assume I need to keep the same differential between lenses & glasses as before. Its a nice experience, & I now understand why so many people do GOC

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