糖尿病性视网膜病变,是糖尿病最重要的微血管病变之一,亦是危害视力的视网膜血管性疾病。其病理基础为视网膜血管渗透性增加、视网膜缺血及视网膜前或玻璃体内纤维血管性及胶质组织增殖。眼底可见视网膜微血管瘤、出血斑、水肿、棉絮状白斑及硬性渗出;视网膜小动脉呈白线,静脉扩张及串珠样改变;视网膜及视乳头上新生血管增殖及机化膜。机化膜收缩以后可发 Diabetic retinopathy, one of the most important microvascular diseases of diabetes, is also a retinal vascular disease that endangers vision. The pathological basis for increased retinal vascular permeability, retinal ischemia and pre-or intravitreal fibrinolysis and glial proliferation. Retinal capillary hemangioma, bleeding spots, edema, cotton wool white spots and rigid exudation; retinal arterioles white line, vein dilation and beaded like changes; retina and optic nerve head on the proliferation of new blood vessels and machine membrane. Machine can shrink after the hair film