老年性黄斑变性简称(SMD)是老年人低视力和致盲的主要原因,65岁后患病率急剧增高,75～85岁间患病率高达27.9%临床上SMD 分为渗出性(湿性)和非渗出性(干性)两型,而开始均有玻璃膜疣(dru-sen)和色素改变,逐渐出现视力不可逆的下降。引起视力障碍主要是在渗出性新生血管阶段。研究证明:氩激光光凝可减轻SMD 中心凹外的视网膜下新生血管膜所致 Age-related macular degeneration (SMD) is the main cause of low vision and blindness in the elderly. The prevalence is dramatically increased after age 65, and the prevalence is as high as 27.9% between 75-85 years old. SMD is divided into exudative ) And non-exudative (dry) type, and began to have dru-sen drusen (dru-sen) and pigment changes, the gradual emergence of an irreversible decline in vision. Cause visual impairment is mainly exudative neovascularization stage. Research shows that argon laser photocoagulation can reduce the subretinal neovascular membrane outside the fovea