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astigmaphile 14 Nov 2017, 09:55

I'm =2.50 at155 in my left eye and the lens isn't thick, especially the pair Zenni made with high index lenses that I did not specifically order.

Weirdeyes 14 Nov 2017, 01:38

This may be a dumb question, but here it goes. Are high cylinder lenses thick? Like maybe +2.00, -4.00. +2.00 and -2.00 aren't exactly thick lenses, but would they be thick in this case?

Lou 10 Nov 2017, 10:51

Hi guest

In minus cylinder form, your prescription is:

R: -1.25 Sph -0.75 Cyl Axis 45

R: -1.25 Sph -0.50 Cyl Axis 165

Although not a strong prescription by any means, yours is hardly the weakest and I wouldn't have thought that it would look like plain glass.

My prescription is:

R: +0.50 Sph -0.50 Cyl Axis 92

R: +0.25 Sph -0.25 Cyl Axis 85

Only to other eye issues, I wear mine all the time. I'd say that my prescription is very weak. You can't really see any prescription in my glasses when I wear them, but if I take them off and look at them, you can clearly see that they are prescription, particularly the right lens.

Nobody has ever asked me about my prescription, so I don't think that the majority of people take much notice.

I hope that this will help.


Soundmanpt 10 Nov 2017, 10:10


This comes up often. Most people,with the exception of those in this forum, don't pay any attention to another persons glasses except for looking at the frame of the glasses. You're prescription is more than enough for full time wear and anyone trying on your glasses will understand why you wear them. So it's not like you have a really weak prescription that others may not even notice if they were trying your glasses on.

guest 10 Nov 2017, 07:26

I'm very slightly short sighted and therefore have a very low prescription. The lens I have look almost like zero power, like plain glass. I don't like wearing them since they look fake but they do seem to make a tremendous difference to the sharpness of my vision.

My prescription is L-2.0

+0.75 @ 135 and R-2.0 +0.50 @ 75

Can you tell me if its possible to get lens made thicker than they would normally be in CR39 1.50 ? I'd really like to have lens like the thickness of -4.


aviator -oo- 26 Sep 2017, 02:14

Thanks, 30calcat . It is not so uncommon to see RX lenses in large sunglass frames, so it is good to know that 75mm is not always the limit. I'll do some searching for suppliers of 81mm.

aviator -oo- 26 Sep 2017, 02:14

Thanks, 30calcat . It is not so uncommon to see RX lenses in large sunglass frames, so it is good to know that 75mm is not always the limit. I'll do some searching for suppliers of 81mm.

aviator -oo- 26 Sep 2017, 02:14

Thanks, 30calcat . It is not so uncommon to see RX lenses in large sunglass frames, so it is good to know that 75mm is not always the limit. I'll do some searching for suppliers of 81mm.

30calcat 25 Sep 2017, 18:34

When you look at lens blank catalogs 75mm is very common, though some are 81mm, especially for sunglasses

aviator -oo- 25 Sep 2017, 05:27

Can someone tell me what diameter un-cut CR39 lenses come in as stock items, prior to being crafted to fit in a particular frame. I have some large frames which I want to have fitted with rx lenses (around -4) and would like to know what the limitations are. I appreciate that PD has to be taken into account. I recall going into an optical store some years ago with some large sunglass frames and the assistant said they would require a non-standard larger size of lens. I assume these were still CR39.

High Myopic 20 Sep 2017, 17:46

What do you think is the rx of these two pairs of myodisc glasses?

First pair.

Second Pair.

NNVisitor 06 Sep 2017, 21:57


I have worn contact lenses for many years. More than thirty years. Prior to wearing contact lenses I wore glasses full time for about ten years. Prior to that I avoided wearing glasses much of the time until my vision was utterly awful. I really did not like to wear glasses in public. About 1970 some people then many were wearing tinted prescription eyeglasses. Some blue tint. Some grey tint. Some brown tint. I broke my glasses one day and they couldn't be properly fixed. My prescription went up again to -8 with some astigmatism as well. I got my first metal frames then and my glasses were tinted. A woman with a similar prescription to mine once commented to me that my glasses were slightly stronger than hers. A good friend of mine thought I was wearing sunglasses. This shows how different an observer's perception could be.

Some people are good at guessing someone's prescription. Others are clueless and can't tell minus lenses from plus lenses.

I have never had polished lenses and I never will. Our perception dictates what we prefer when it comes to eyeglasses. Some of us are acutely aware of the power of and the look of glasses prescriptions. Others don't give much thought to it and can be quite clueless about prescriptions and how lenses look.

This can all be explained by the psychology of perception. The fact is that we all filter out some aspects of what we see. That's why some of us remember exactly what someone was wearing and others can't remember.

astigmaphile 06 Sep 2017, 21:31

Cactus Jack,

I wear plus cylinder lenses and notice that they also have so called power rings.

SoCal 06 Sep 2017, 20:16

Thanks Cactus! I was just curious. I noticed the difference when I was holding my specs outside and compared them to their look inside and it had me wondering. I rarely wear my specs but I'm finding myself wearing them more and more lately as my contact lens tolerance is going down. Anyway, thanks for the info!

Cactus Jack 06 Sep 2017, 20:13


I suspect the sunlight effect you asked about is caused by sunlight brightly illuminating the edge of the lens and making it more visible in the reflections.

I want to try using a black marker on a frosted lens edge to see if that affects the power rings on an old lens, but have not tried it. I might try it first with a dry erase marker, which might be removable. A permanent marker might react with the lens material and really be PERMANENT. It should not have any effect on the refractive power of the lens.

Let me try it first on an old lens.


Cactus Jack 06 Sep 2017, 20:02


What some people call "Power Rings" are actually internal reflections of the outside edge of MINUS lenses. Frosted edges appear white from the front of the lens. Polished Edges can also be seen, but they tend to appear as a mirror like surface. You can demonstrate this effect by licking your finger (for good contact) and holding it against the outer edge of the lens while looking from the front.

The internal reflections can be minimized by using a very light tint in the lens.


SoCal 06 Sep 2017, 18:06

Why do lenses appear thicker in sunlight if you don't have polished edges? Is it the material used and is the whiteness something that can go away in the sunlight by having polished lenses? Just curious.

HighMyopic 29 Aug 2017, 15:41

Have you found the Indian manufacture of these +64 diopter glasses yet?

HighMyopic 18 Aug 2017, 08:50

How much did you pay for the glasses? Can they be shipped to the USA?

Ian 18 Aug 2017, 07:43

High Myopic

I cannot seem to find a photograph of the glasses, I will keep looking.

Yes the lenses were thick. It looked like they had a small glass marble at the centre. They were not suitable for walking around.

HighMyopic 18 Aug 2017, 06:10

You have a pic of your X16 glasses that you mislaid? The lenses were very thick?

Ian 18 Aug 2017, 06:01

High Myopic,

A couple of years ago I bought some magnifying spectacles for close work. I have mislaid the glasses but they were magnification X16 with an Rx of around +64D. They were only suitable for very close work. I will try to find the company's name, I think they were based in India.

astigmaphile 17 Aug 2017, 20:04

I have never seen so much high cylinder in one place. Twenty one diopers is just unbelievable. The whole thing is making me drool.

HighMyopic 17 Aug 2017, 18:59

Can this company make high plus lenses that are over +48 diopters? I now want to have a pair of glasses that is over +50 diopters. perfectly +60 or more diopters. My +48 diopter glasses are still very nice to wear but i now want stronger plus lenses.

LikeGlass 17 Aug 2017, 18:11

Interesting lens work at this shop. -31 ??? Yikes

Soundmanpt 08 Aug 2017, 08:21


Anytime you come across a pair of glasses and after wearing them a short time if they don't feel right you need to take them off right away. I know sometimes you can tell if they have prisms by the edge thickness but its no so easy if it is only a small amount of prism. But even a small amount could damage your eyes. You have experimented with enough glasses with many different prescriptions to what feels right and what doesn't. Are you still working at the landscaping business? You don't wear glasses during the day at work. You only wear your strong glasses on the weekend and in the evenings. But since you moved are you comfortable wearing glasses around your neighborhood on weekends and evenings now? You had found a nice pair of progressives that you seemed to like quite a bit because they had a nice minus prescription for distance and the add allowed you to read small print comfortably as well. Are you still wearing them at times or have you found other favorites you like better. I'm sure you have added to your collection considerably since you last posted pictures of glasses you have bought. I look forward to seeing pictures of some of those glasses.

Marķa 07 Aug 2017, 05:39

Thanks for the clues, Cactus Jack. Nice to know there's those ways, but it really seems hard. I'll look for the test you mentioned.

Antonio, Soundmanpt, don't worry. I only wear for prolonged periods the glasses whose prescription I know for sure. I don't want to hurt my eyes either, so if any of my glasses give me some discomfort, I don't wear them for more than a few minutes.

Cactus Jack 06 Aug 2017, 15:50

Assuming both eyes have the same prescription and a VD of 10 mm, It would be very close to:

OD Sphere -7.00, Cylinder -2.25, Axis 180

OS Sphere -7.00, Cylinder -2.25, Axis 180


NNVisitor 06 Aug 2017, 15:47

-6.50 contact lens would be -7.00 in eyeglasses. The astigmatism correction should be the same. In some soft contact lens brands the astigmatism correction is in -.50 increments thus when converting to contact lenses from an eyeglasses prescription it's the same if not available go .25 lower. In contact lens astigmatism correction. The contact lens axis may only be in increments of 10 ot 20 degrees in some soft contact lens available for astigmatism correction. Only an eye exam by a qualified ECP can confirm your exact correction requirement.

 06 Aug 2017, 15:02

Any general guess as to what the following contact RX would translate to in glasses???

sph. cyl. axis

-6.50 -2.25 180

Soundmanpt 05 Aug 2017, 17:55


It has been a long time since you last posted. It seems that you're still buying used glasses. If those glasses in anyway don't seem right you shouldn't wear them. It doesn't take too long wearing glasses with prism to completely ruin your eyes. I'm sure you don't want to be seeing everything in double vision or cause your eyes to become cross eyed.

Cactus Jack 05 Aug 2017, 15:09


It is not always easy to tell if glasses have prism. It depends on how much prism and which direction the base of the prism is oriented

Here are a few clues:

1. Compare the edge thickness on opposite sides of the lenses, both horizontally and vertically. The thicker edge is the Base direction. A difference is not an absolute guarantee that the lenses have prism. It is common for inside edges (next to your nose) to have thinner edges in Minus lenses that do not have any prism. It depends on the width of the lenses.

2. Sometimes you can tell by looking at the lenses from the front. Lenses with prism will have different looking edges as viewed from the front of the lens.

3. If you can see pretty well with them at a distance of 3 or 4 meters (10 to 15 feet, you might consider doing the Simple Prism Test as described on the Vision & Spex site.


antonio from lenschat 05 Aug 2017, 15:01

Please Maria don't wear glasses with prism correction,

i heard if yiu do so you get very fast dependent on the same prism correction, if you don't wantvto see double images your whole life. Don"t know that's true, but please don't try

Best regards antonio

Marķa 05 Aug 2017, 14:13


Long time no see, and here I am, looking for an answer. Damn me! haha.

I wanted to ask... is there a sure way of knowing if a pair of glasses have any prism prescription? I bought a used pair that feels... a bit strange and I fear they do have it. How can I know just by looking at them?

Thanks in advance,


30calcat 30 Jun 2017, 06:43


Jack 29 Jun 2017, 11:39


Your glasses look really fantastic. The photography shows them off to the extreme. They really interest me. Your eyes must look very small behind those powerful lenses.

What are the lenses made of to make them look so thick?

30calcat 28 Jun 2017, 18:12

No prism

Jack 28 Jun 2017, 17:01


Any prism?

30calcat 28 Jun 2017, 16:11

-16.25, -15

Jack 28 Jun 2017, 16:00


What is you full prescription?

30calcat 28 Jun 2017, 15:21


Most people would not consider your glasses thick. I wear these much thicker glasses in a semi-rimless frame every day:

I am comfortable wearing them and they have never attracted negative attention. The very occasional questions I get are probably from a fellow OO.

Mel 28 Jun 2017, 13:59

Thanks for the input, Paul. You bring up an interesting point, though I can't say that I fully agree: as an OO, I've always preferred semi-rimless to rimless, especially in a high-prescription, as a semi-rimless somehow "defines" the thickness of the lens more, whereas a rimless kind of melts into the face, regardless of the prescription.

In any case, since I have a life outside of my fetish, my goal was to figure out whether my glasses (here is an updated photo: look ridiculously thick. I'm in college and my prescription is still rising steadily, so I anticipate something like a -1 increase to a -7.75 at my next exam. I'm trying to figure out at which point I'll have to bite the bullet and go for full-rimmed.

Paul 26 Jun 2017, 19:21


I think rimless and semi-rimless should NOT be grouped together for your question. With rimless, a little thickness looks good because thin rimless glasses just disappear on a person's face...the thickness, in effect, serves as the "frame" and I think it's a positive effect (even from a non-optic-obsessive perspective) up to a reasonable thickness (like 1/4" or 7mm maybe).

I feel completely differently about semi-rimless, which are typically a very "dainty" or lightweight frame that is easily overpowered by lenses more than a few mm thick (in my opinion).

My $0.02 only. And I agree with others that most people don't notice lenses regardless. For example, I went from wearing -3 glasses to -8 full time and no one ever said a thing or seemed to notice at all.

HighMyopic 26 Jun 2017, 18:33

What do you think is the rx of these lenses? They look like myodisc lenses.

NNVisitor 24 Apr 2017, 09:17


I just checked the image you posted. I think the glasses were well chosen and do not look very thick. Mine are several D higher and I have astigmatism as well. I don't know what index has been used on my glasses other than that they're high index glass lenses. I know that there is a 1.9 index zeiss glass lens available which is the thinnest that I know of. This type is very expensive and I'm sure mine are not that lens type.

Rayray 23 Apr 2017, 00:52

Hi Mel, for your prescription and the index of lens you have (1.67) your lenses are about normal - I have a prescription of about -8.5 so my glasses are very similar. If you don't want the thickness to be noticeable a thick plastic frame is the best option - rimless or semi-rimless will just draw attention to your lenses. A lot of people are very unaware of glasses lenses however and still won't think your glasses are thick.

Maxim 20 Apr 2017, 16:15

To Anonymous No. 1, No. 2, No.3 ..... No. 99

I must admit, you are right. Stealing is forbidden, that starts in the Holy Bible and continues in our legislative systems.

Not a good idea.

Believe it or not, during our school years, we collected old glasses for experiments in the physics lessons, optics. Then we learned about the camera, the human eye, the telescope and the binoculars, and camera lenses, not to forget the microscope, and much more.

Mel 20 Apr 2017, 15:15

NNVisitor, Antonio,

Thanks for the advice. It seems that I did pick a frame that is way too large, and that's why the lenses are so thick.

Could you give me an example of a semi-rimless frame that would minimize thickness? And what ET do you think would be acceptable in a rimless/semi-rimless?

?!?!?!?!?!?!!! 20 Apr 2017, 14:05

maxim What Are You Talking About? Stealing is Stealing is Stealing. With Your Logic, I Ask Is it Better to Steal from A Person or a Bank? Some Logic You Have There, Little One. The Other Anon Poster Is Absolutely Correct.

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