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refraction (re-frak´shәn)   the act or process of refracting; specifically, the determination of the refractive errors of the eye and their correction with glasses.
Refraction by the eye in (A) emmetropia; (B) hyperopia; and (C) myopia.

Refraction by the eye in (A) emmetropia; (B) hyperopia; and (C) myopia.
  the deviation of light in passing obliquely from one medium to another of different density.




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