Question

[EissMachine]

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I recently had an eye exam to get a new prescription for glasses. I'm very nearsighted, so my perscription is pretty strong, and I went to get a new one because I noticed my lenses were losing the sharpness at long range. So I got these new lenses, with all the bells and whistles, the non-glare stuff etc. After a little bit though I noticed that the glasses weren't that sharp at long distance. Usually it takes a year or so before they get to the point where they went to after only a couple of weeks. But here's the thing that gets me, another pair of glasses I got (sports glasses) had the same perscription put in, however, that pair has the sharpness at long distance that I don't have with my regular glasses that have the same perscription. I'd like to know any theories you have as to why my regular glasses don't have the sharpness but my sports glasses (with the same perscription) do. One theory is that the people that did my regular glasses just don't put in good perscriptions, but does that happen? Another theory is that the non-glare stuff doesn't react well with my eyes, thus losing their sharpness. I don't know, I'd like to see what you guys who are in this business think.

 

[rpames]

It could always be that you have different materials in the lens. For example, polycarb lenses don't yield as clear/sharp image as glass. But I don't think this is the case with you. For one, I don't think you would have glass in your sport glasses. If the lenses are the same in both pairs, or even if they are not, it could be a vertex distance thing. Since you are a myope (nearsighted), the closer the lenses are to your face, the more powerful the lens. So, if the sport glasses are closer to your eyes, they will provide essentially more minus power. If your other lenses are further out on your nose, they will provide less power. Vertex distance is very important in higher powers and since you said you are "very nearsighted" this could be the case. Also, if you have a large amount of astigmatism, one pair could be off axis. Only a few degrees could be the difference.

These theories are ones that only work if the difference in clarity started right off the bat, this would not be progressive thing.

 

[r_salis]

It's possible that the lab put the wrong lenses in. Try taking both pairs of glasses back to the place you had them made and ask the optician to check to make sure they're both the same Rx. It's a quick thing to have checked.

 

[drbizzaro]

I recently had an eye exam to get a new prescription for glasses. I'm very nearsighted, so my perscription is pretty strong, and I went to get a new one because I noticed my lenses were losing the sharpness at long range. So I got these new lenses, with all the bells and whistles, the non-glare stuff etc. After a little bit though I noticed that the glasses weren't that sharp at long distance. Usually it takes a year or so before they get to the point where they went to after only a couple of weeks. But here's the thing that gets me, another pair of glasses I got (sports glasses) had the same perscription put in, however, that pair has the sharpness at long distance that I don't have with my regular glasses that have the same perscription. I'd like to know any theories you have as to why my regular glasses don't have the sharpness but my sports glasses (with the same perscription) do. One theory is that the people that did my regular glasses just don't put in good perscriptions, but does that happen? Another theory is that the non-glare stuff doesn't react well with my eyes, thus losing their sharpness. I don't know, I'd like to see what you guys who are in this business think.

it really sounds like the glasses that are blurry have the wrong Srx (prescription) in them... I'm guessing the optician put in less power... I've seen this happen numerous times before...

Here's a quick check... put on the sports goggles and stand away from a calendar so that the numbers are just barely readable.... now put on the other glasses, and if you look at the numbers.... if they are only really really blurry, like a circle, then your glasses are probably made wrong...

 

[EissMachine]

it really sounds like the glasses that are blurry have the wrong Srx (prescription) in them... I'm guessing the optician put in less power... I've seen this happen numerous times before...

Here's a quick check... put on the sports goggles and stand away from a calendar so that the numbers are just barely readable.... now put on the other glasses, and if you look at the numbers.... if they are only really really blurry, like a circle, then your glasses are probably made wrong...

you see, I've done that, and that's why I notice that the sports glasses have more sharpness then my regular glasses. But the thing is, I had a lense replaced with the same prescription and it was the same as my original, so do you think he could get the prescription wrong twice? If it was wrong, and he made it right, my new lens would be different then my original. I don't know, I'm getting tired of this crap, I can't wait until I'm old enough to get laser eye surgery.

 

[drbizzaro]

you see, I've done that, and that's why I notice that the sports glasses have more sharpness then my regular glasses. But the thing is, I had a lense replaced with the same prescription and it was the same as my original, so do you think he could get the prescription wrong twice? If it was wrong, and he made it right, my new lens would be different then my original. I don't know, I'm getting tired of this crap, I can't wait until I'm old enough to get laser eye surgery.

put both the sports ones on... and using a ruler, tell me what distance the lenses are from your right eye
(just approximate with your finger)

then do the same with the other glasses...

write down the distances below...

i'm also wondering if he lied about putting in new lenses... i'm thinking he might have

 

[EissMachine]

put both the sports ones on... and using a ruler, tell me what distance the lenses are from your right eye
(just approximate with your finger)

then do the same with the other glasses...

write down the distances below...

i'm also wondering if he lied about putting in new lenses... i'm thinking he might have

He did put in a new lens because the original lens was cracked. And yes, my sports glasses are alot closer to my eyes then my regular glasses. The sports glasses are just a pair of sport sunglasses with the tint taken away so there is basically no seperation between lens and the face.

 

[drbizzaro]

He did put in a new lens because the original lens was cracked. And yes, my sports glasses are alot closer to my eyes then my regular glasses. The sports glasses are just a pair of sport sunglasses with the tint taken away so there is basically no seperation between lens and the face.

ok... since the sport glasses are much closer to your face, you are given more (-) power in these glasses... which means with the other prescription, you'll need more power in order to see the level of clarity you wish...

I'm guessing if they are written up at -1.00, you'd need about -2.00

 

[rpames]

I'm guessing if they are written up at -1.00, you'd need about -2.00

This person would need to be at least -4.00 before vertex distance would play a factor at all.

 

[drbizzaro]

This person would need to be at least -4.00 before vertex distance would play a factor at all.

yeah, i know... i was just saying hypothetically to let him know about power increase