- 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(s): Gunn crossing sign
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.