Aneurysm of the internal carotid artery with bone arrosion and extradural compression of the optic nerve

A 47-year-old man presented with a 10-year history of progressive painless vision loss in the right eye. Ophthalmologic examination revealed that only minimal light perception of the right eye was preserved and that light reaction could no longer be elicited. The exophthalmometry showed proptosis of the right eye. The right optic disc …