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Related to nuclear sclerosis: cortical cataract
increased refractivity of the central portion of the lens of the eye. See: nuclear cataract.
An increase in the refractive index of the eye's crystalline lens, which culminates in the development of nuclear cataracts. Before the cataract fully opacifies, the patient's near vision may improve, a phenomenon known as senopia or second sight.
See also: sclerosis