Questions tagged [contact-lenses]

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3
votes
1answer
55 views

Why are there different perscriptions for glasses and contacts? Help me see eye to eye on this

Why can't a prescription for glasses be used for contacts also? Isn't the eyesight still the same? At first, I cynically thought it was just another way for my optometrist to make money -- so he had ...
2
votes
1answer
75 views

How to reduce the side effects of wearing contact lens? [closed]

This explains a lot of side effect of wearing contact lens. The type of contact lens Iam talking about is silicon hydrogel lenses. Questions: 1) Till how many hours can lens be worn continuously? 2)...
1
vote
0answers
11 views

Can prescription lenses correct Chromatic Aberration?

Are prescription lenses available to correct chromatic aberration of the human eye? I find the effect quite appreciable: at night, I see circular rainbows around bright street lamps, and am unable ...
1
vote
0answers
57 views

Cannot read from 20 metres away - even with glasses

I have had bad eyesight from birth, and i mean bad. My lenses on my glasses are as thick as anything, without them everything is blurry unless it is a couple of inches away from my face. Anyway, upon ...
1
vote
2answers
54 views

Contiuously wearing the same contact lens - ok? [closed]

Currently I'm using a contact lens for some short-sightedness. It's been around one month. Its validity is for only one month, now its validity expires. I'm using it and I had no issues. The ...
2
votes
1answer
46 views

Is it ok to not wash a contact lens?

My contact lens fell out onto a relatively clean surface. I picked it up and put it back into my eye without washing my hands or the contact. There were no visible particles on the contact and the ...
2
votes
1answer
2k views

What effects would aspheric contact lenses have on eyes without astigmatism?

Aspheric lenses are used for treatment of astigmatism. I am curious what effects might happen if they were used by someone without an astigmatism. What effects would it have on visual acuity? ...