Vision is usually reduced to the level of counting fingers or hand movements, unless there is a separate
cilioretinal artery supplying the macula.
Case report: association of combined nonarteritic anterior ischemic optic neuropathy (NAION) and obstruction of
cilioretinal artery with overdose of Viagra.
Central retinal artery occlusion (CRAO) deprives the entire inner retina of its blood supply unless a
cilioretinal artery is present (15-30% of eyes).