Normal ocular circulation and the effect of arterial occlusive disorders.
Arterial occlusive disease, either primary or secondary, may not only affect the appearance of the ophthalmic artery, posterior ciliary arteries, and choroid crescent, but may be reflected in the prolongation of the circulation time to the choroid crescent. Choroid circulation time determined in 80 normal carotid angiograms showed that a value greater than 4.5 sec. for a population under 30 years of age, and greater than 5.6 sec. for a population 30 years of age and older, is prolonged. One should view these studies with suspicion and search for intra-orbital, intracranial, or extracranial arterial occlusive disease.
D000328:Adult; D000368:Aged; D000792:Angiography; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging*; D001161:Arteriosclerosis / Q000000981:diagnostic imaging; D001164:Arteriovenous Fistula / Q000000981:diagnostic imaging; D002339:Carotid Arteries / Q000000981:diagnostic imaging; D002340:Carotid Artery Diseases / Q000000981:diagnostic imaging; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D002426:Cavernous Sinus / Q000000981:diagnostic imaging; D002648:Child; D002829:Choroid / Q000098:blood supply; D002924:Ciliary Body / Q000098:blood supply; D005123:Eye / Q000098:blood supply*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging; D012039:Regional Blood Flow; D013997:Time Factors