Compensation: Eyeglasses are made to adjust the light focus onto the retina at the back of the eye. They compensate for whatever the natural focus is by adding or subtracting light bending ability. They are also used to compensate for the hardening of the lens that occurs after age 40 (presbyopia).
Answered 7/7/2012
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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