Olver J M
Moorfields Eye Hospital, London.
Eye (Lond). 1990;4 ( Pt 2):262-72. doi: 10.1038/eye.1990.38.
The functional anatomy of the normal choroidal circulation in man is described from scanning electron microscopic examination of methyl methacrylate microvascular casts. Distal and para-optic short posterior ciliary arteries supply wedge-shaped areas of choroid. Regional variations in choriocapillary morphology are well recognised; the lobules are densely packed at the posterior pole with a high capillary to inter-capillary ratio. Choroidal capillaries are flattened providing a large surface area for metabolic exchange with the retinal pigment epithelium. In acute choroidal ischaemia (from a variety of systemic disease), wedge shaped choroidal lesions may correspond to occlusion of short posterior ciliary arteries and geographic or focal lesions to occlusion of choroidal arterioles or choriocapillary lobules.
通过对甲基丙烯酸甲酯微血管铸型的扫描电子显微镜检查，描述了人类正常脉络膜循环的功能解剖结构。远端和视旁短后睫状动脉供应脉络膜的楔形区域。脉络膜毛细血管形态的区域差异已得到充分认识；小叶在后极密集排列，毛细血管与毛细血管间的比例很高。脉络膜毛细血管呈扁平状，为与视网膜色素上皮进行代谢交换提供了较大的表面积。在急性脉络膜缺血（由多种全身性疾病引起）时，楔形脉络膜病变可能与短后睫状动脉阻塞相对应，而地图状或局灶性病变则与脉络膜小动脉或脉络膜毛细血管小叶阻塞相对应。
