refractionist re·frac·tion·ist (rĭ-frāk’shə-nĭst)
A person trained to measure the refraction of the eye and to determine the proper corrective lenses.


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  • Refractive

    adjective 1. of or relating to refraction. 2. Also, refractile. having power to refract. adjective 1. of or concerned with refraction 2. (of a material or substance) capable of causing refraction

  • Refractive-index

    noun, Optics. 1. index of refraction. refractive index noun 1. (physics) a measure of the extent to which radiation is refracted on passing through the interface between two media. It is the ratio of the sine of the angle of incidence to the sine of the angle of refraction, which can be shown to be […]

  • Refractive keratotomy

    refractive keratotomy n. Surgical modification of corneal curvature by incising the cornea to minimize hyperopia, myopia, or astigmatism.

  • Refractivity

    [ree-frak-tiv-i-tee] /ˌri frækˈtɪv ɪ ti/ noun 1. the power to refract.

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