LYCOS RETRIEVER 
Glasses: People
built 634 days ago
Why do some people need glasses and others don't? Everyone's eyes are a little different - not just the color, but the way they work and how well they see. Sometimes all the parts of the eye don't work together the way they should. But eyeglasses or contact lenses... called corrective lenses, can help most people see more clearly.
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One-size-fits-all reading glasses do not work well for people who have a different prescription in each eye, or whose eyes are not centered in the lens. Headaches are a common problem in those cases.
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Every year, millions of people undergo LASIK or other types of vision correction surgery to restore vision and eliminate the need for glasses or contact lenses. For many people the surgery is safe and effective, with few (reportedly 3%) experiencing post-operative conditions like blurry vision and/or difficulty driving at night.
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