title: Optic disc structure in anterior ischemic optic neuropathy.
abstract: The etiology of anterior ischemic optic neuropathy (AION), when not associated with giant cell arteritis, is usually unknown. Clinical, pathologic, and experimental studies have not determined a cause. The optic disc appearance in both the involved and normal fellow eye was studied in 51 patients with acute nonarteritic AION. The number of discs (both involved and fellow) without a physiologic cup was significantly greater than would be expected from normal population studies. The etiology of nonarteritic AION may be related to the anatomic configuration of the optic nerve.
mesh_terms: D005123:Eye / Q000098:blood supply*; D006801:Humans; D007511:Ischemia / Q000150:complications*; D009898:Optic Disk / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000209:etiology / Q000473:pathology*