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A form of partial blindness in which bright light causes blurring of vision, resulting from a malfunction of the photopic visual system, often as a side-effect of anticonvulsant medication prescribed for people with epilepsy. The term is sometimes misapplied to nyctalopia, but this is avoided in careful usage. Also called day blindness. Compare nyctalopia. [From Greek hemera day + alaos blind + ops an eye + -ia indicating a condition or quality]

Subjects: Psychology.

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