Li F C, Tenner M S, Rothman L, Quencer R M
Radiology. 1977 May;123(2):369-74. doi: 10.1148/123.2.369.
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.
原发性或继发性动脉闭塞性疾病不仅可能影响眼动脉、睫状后动脉和脉络膜新月的外观，还可能表现为脉络膜新月循环时间延长。在80例正常颈动脉血管造影中测定的脉络膜循环时间显示，30岁以下人群的值大于4.5秒，30岁及以上人群的值大于5.6秒，即为延长。人们应该对这些研究持怀疑态度，并寻找眶内、颅内或颅外动脉闭塞性疾病。
