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is it bad to wear someone else's prescription glasses?

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Is wearing someone else's prescription glasses bad?
I've been wearing my sisters old glasses for a while because I can see better with them. Is this bad since we probably dont have the same prescription? Should I stop and get my own.

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asked Apr 13, 2017 in Health by Barbara

2 Answers

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If you can see better with your sister's glasses, it suggests that you ought to arrange to have an eye test and possibly get glasses of your own.

Wearing somebody elses glasses won't make you need glasses (that story is total hog-wash!). Think about it logically, if looking through lenses forced your eyes to go bad, everybody that frequently uses such things as microscopes, telescopes, binoculars, rifle scopes, etc would ultimately mess up their eyes. The worst you could do from wearing her old glasses is get headaches. Although it is unlikely for 2 people to have the exact same prescription, if the glasses are "close" to what you need, they will be better than no glasses at all.
answered Apr 13, 2017 by Flying Dragon
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That depends on your age. In children low vision induced by wrong glasses may cause amblyopia (lazy eye), that constitutes a permanent damage. According to some theories even myopia may develop in children who are wearing wrong prescription glasses.
In adults however the nerve wiring between the eyes and the brain is already established and rigid, so there is no danger of amblyopia.
Wrong glasses may cause eye strain and even headache, but usually no permanent damage.
Prolonged use of wrong glasses in adult may sometimes induce squint (deviation of the eyes) but that is uncommon.
answered Apr 13, 2017 by Ed Averbukh

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