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Crystalline lens
CRYSTALLINE LENS

Definition: A firm, gelatinous lens-shaped body, consisting of many layers of slightly different refractive indices, behind the pupil of the eye. Its focal length is variable between limits by muscular control of the thickness and shape, and it can thus focus on the retina clear images of objects at different distances.
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See perfect eye (1).
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See perfect form (1).

See perfect body (4).
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