BILATERAL OPTIC DISK PALLOR AFTER UNILATERAL INTERNAL CAROTID-ARTERY OCCLUSION

Bilateral pallor of the optic disks was observed in a 52-year-old man after dissection of an internal carotid artery. Diffuse pallor of the ipsilateral optic disk reflected infarction of the ipsilateral optic n erve and ''bow-tie'' atrophy of the contralateral optic disk reflected infarction of the ipsilateral optic tract. The findings were due to a n occlusion of the internal carotid artery proximal to the origin of t he ophthalmic artery, resulting also in insufficiency in the area of s upply of the anterior choroidal artery.