Amaurosis fugax caused by lesion/atherosclerosis in-

Ref: KV Krishna Das - Clinical Medicine 4th Edition pg no: 402 central retinal aery is a branch of ophthalmic aey ,The ophthalmic aery (OA) is the first branch of the internal carotid aery distal to the cavernous sinus Sudden, transient, monocular blindness, coming on like a cuain falling swiftly over the upper half of visual field and lasting for 5 to 15 minutes should suggest embolism of central retinal aery. This is called "amaurosis fugax". It may persist for a longer time if it leads to retinal infarction. Visual loss occurring at the onset of calssical migraine may also follow a similar pattern. It is due to vasospasm