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糖尿病性增殖性视网膜病变是纤维血管组织在视网膜或视乳头上生长,并可延伸到Bruch膜后面,因而引起玻璃体出血和视网膜脱离,因此有失明的危险。这种视网膜病变的发生与视网膜缺血有关,可由眼底荧光血管造影显示视网膜有非灌注区而得到证实。光凝的适应证为:(1)视乳头新生血管>1/3PD者;(2)视乳头新生血管不论有多大,但伴有出血者;(3)不论何处有新生血管但合并有视网膜出血或玻璃体出血者;(4)新生血管范围广而没有出血的眼,以及有增生前特征的眼(静脉出血、视网膜微小血管病变、许多棉絮状斑点、广泛的点状出血及荧光血管造影显示有广泛非灌注区者,也可作光凝治疗。全视网膜光凝一只眼同时需观察另一只眼有无危险特征前兆。
Diabetic proliferative retinopathy, a condition in which fibroblasts grow on the retina or papillae and extend to the back of the Bruch’s membrane, thus causing vitreous hemorrhage and retinal detachment, is at risk for blindness. The occurrence of this retinopathy and retinal ischemia, retinal fluorescein angiography showed non-perfusion zone area and confirmed. Photocoagulation indications are: (1) papilla neovascularization> 1 / 3PD; (2) papilla new blood vessels no matter how large, but associated with bleeding; (3) no matter where there are neovascular but with retinal Bleeding, or vitreous hemorrhage; (4) eyes of a wide range of neovascularization without bleeding and of pre-proliferative features (venous haemorrhage, retinal microangiopathy, many batting spots, extensive spotting and fluorescein angiography There are a wide range of non-perfusion area, but also for photocoagulation.Radial retinal photocoagulation one eye at the same time need to observe the other eye with or without the risk characteristics of precursors.