Medical Definition of Marcus Gunn's sign
1.
Compression of the underlying vein at arteriovenous crossings seen ophthalmoscopically in arteriolar sclerosis, on alternate stimulation with light, the pupil of an eye with optic nerve transmission defect constricts poorly or even dilates when stimulated (a relative afferent pupillary defect).
Synonym: Marcus Gunn's sign.
(05 Mar 2000)
Lexicographical Neighbors of Marcus Gunn's Sign
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