This article reports three cases of visual failure of presumably ischemic etiology, after aneurysm surgery; the first case occurring 7 months after clipping and gauze wrapping of a 4-mm anterior communicating artery aneurysm; the second case occurring 8 months after gauze wrapping of a partially intracavernous 10-mm internal carotid artery aneurysm which projected into the right optic foramen; and the third case occurring 11 months after ligation, clipping, and gauze wrapping of an 8-mm internal carotid-posterior communicating artery aneurysm.