Marcus Gunn pupil

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English[edit]

English Wikipedia has an article on:
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Etymology[edit]

Named after Scottish ophthalmologist Robert Marcus Gunn.

Noun[edit]

Marcus Gunn pupil (plural Marcus Gunn pupils)

  1. A pupil of the eye that exhibits unusually little constriction when a bright light is swung from the unaffected eye to the affected eye. It can be caused by a lesion of the optic nerve.