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November 2017

What Is a Refraction?

Also called a “vision test,” a refraction is given as part of a routine eye examination in our Princeton-area ophthalmology practice. This test allows your eye doctor to determine the best prescription lens for your eyeglasses and contact lenses. A value of 20/20 is considered optimum, or “perfect” vision. When performing a refraction, your eye care professional uses an instrument called a phoropter, which resembles an oversized pair of glasses. As an individual gazes through the phoropter, the doctor flips different lenses in front of their eyes until the patient chooses the correct combination of lenses. The refraction is best … Continue reading




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