Although the manifestations of posterior ciliary artery occlusion(PCAO)are more complex than that of central retinal artery occlusion(CRAO),it has been overlooked clinically.This article starts with the descriptions of anatomy and blood supply of pos-terior ciliary artery(PC A),then moves on to the illustrations of compensatory mechanisms,pathologies and clinical characteristics of PCAO in depth,aiming to help understand the PCAO and associated choroid ischemia,ischemic optic neuropathy systemically.(Oph-thalmol CHN,2024,33:81-86)
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