正常人眼房水主要通过小梁间隙、内皮网、Sch1emm管、收集管到房水静脉而排出眼外。当该系统阻力增加或闭塞时,就会导致不同类型的青光眼。历年来眼科学家对这一引流系统进行了很多研究,特别是Cairns采用小梁切除术以来,许多作者利用这一活体新鲜标本,通过透射及扫描电子显微镜对房角组织的超微结构进行了较为详尽的研究,对阐明青光眼的发病机理有了新的进展。一、正常眼房角组织的超微结构 (一)小梁正常小梁由核心、基底膜、内皮细胞组成。在不同的切片中小梁呈长条形或椭圆形。核心由胶原纤维和弹力纤维组成。胶原纤维环形定向排列,分布比较均匀;弹力纤维不规则地分布于胶原纤维之中。这些纤维电子密度高,故核 Normal human aqueous humor mainly through the trabecular gap, endothelial network, Sch1emm tube, collecting tube to the aqueous humor and excreted. As the system’s resistance increases or occludes, it can lead to different types of glaucoma. Over the years ophthalmologists have done a lot of research on this drainage system. Especially after trabecular surgery has been performed by Cairns, many authors have made use of this living fresh specimen to compare the ultrastructure of the corner tissue by transmission and scanning electron microscopy Detailed research, to clarify the pathogenesis of glaucoma has made new progress. First, the normal ocular tissue ultrastructure (A) trabecular normal trabecular heart, basement membrane, endothelial cells. Trabeculae were elongated or oval in different sections. The core consists of collagen fibers and elastic fibers. Collagen fibers arranged in a circular orientation, more evenly distributed; elastic fibers irregularly distributed in the collagen fibers. These fibers have high electron density and are nuclear