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    optic axis

    optic axis - Dictionary definition and meaning for word optic axis

    Definition
    (noun) in a doubly refracting crystal, the line in the direction of which no double refraction occurs
    Example Sentence
    • a crystal may have either one or two optic axes
    Definition
    (noun) a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted
    Synonyms : principal axis
    Example Sentence
    • in a normal eye the optic axis is the direction in which objects are seen most distinctly
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