Marcus Gunn pupil
English
editEtymology
editNamed after Scottish ophthalmologist Robert Marcus Gunn.
Noun
editMarcus 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.