Marcus Gunn pupil
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English[edit]
Etymology[edit]
Named after Scottish ophthalmologist Robert Marcus Gunn.
Noun[edit]
Marcus Gunn pupil (plural Marcus Gunn pupils)
- 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.