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A member asked:
What are the ways that eye doctors determine what strength your contact lenses should be?
A doctor has provided 1 answer
Refraction: Typically a doctor will put you in front of a machine that can actually measure the refractive error of your eye. This is a good estimate and from the shape of your cornea, your refractive error and your doctors experience, a trial lens is placed on your eye.
Answered 4/19/2013
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