裂孔原性视网膜脱离为临床常见病,当查裂孔时应注意其发病机理。现按裂孔所发生的部位分组讨论(图)。一、周边组(一)周边圆形裂孔定义:锯齿缘后方约1 pd 为周边侧界限(即玻璃体基底后缘);在眼球外面测量,由角膜缘17～19mm 处为后极侧界限。在这两个界限范围内所存在的裂孔(引起视网膜 Occipital retinal detachment is a common clinical disease, when checking the hole should pay attention to its pathogenesis. Break the hole by the location of the group discussion (Figure). First, the peripheral group (a) around the definition of circular hole: serrated edge of the back of about 1 pd for the peripheral side of the limit (ie, vitreous base of the trailing edge); measured in the eyeball from the limbus 17 ~ 19mm at the posterior pole boundaries. Holes that exist within these two boundaries (causing the retina