4 doctors weighed in:

What are the ways that eye doctors determine what strength your contact lenses should be?

4 doctors weighed in
Dr. Bruce Saran
Ophthalmology
3 doctors agree

In brief: 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.

In brief: 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.
Dr. Bruce Saran
Dr. Bruce Saran
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