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Definition of Refract

Refract: In ophthalmology, to determine the bending of light that takes place within the human eye.

Refractive errors include nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. Lenses can be used to control the amount of refraction, correcting those errors.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=10643
Last Editorial Review: 6/14/2012

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