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本病是发生于老年人的一种侵犯眼底黄斑区视网膜和脉络膜的变性疾病。据国外统计,65岁以上的老年人约30%有不同程度的黄斑变性。随着我国人民平均寿命的延长,国内本病的发生率亦有所增加,因此越来越受到人们的重视。人的眼底视网膜主要的功能是感受光线。如受某些原因使视网膜的这一功能遭到破坏,则可引起不同程度的视功能改变,甚至致盲。老年人为什么会患黄斑变性,目前原因尚不完全清楚,有的为遗传,但多数为老年改变,因为黄斑区的营养主要来自脉络膜毛细血管层,若老年人该区脉络膜动脉或微血管硬化,则可导致黄斑萎缩变性。也有人认为是老年人全身弹性组织退化,伴有玻璃膜中弹力纤维逐渐变性所致。轻者仅表现为黄斑部玻璃膜疣、色素紊乱、中心反射消失;重者出现蜂窝状囊肿、水肿、出
The disease occurs in the elderly in a violation of macular retinal and choroidal degeneration disease. According to foreign statistics, about 30% of elderly people over the age of 65 have varying degrees of macular degeneration. With the extension of the average life expectancy of our people, the incidence of this disease has also increased in our country and is therefore attracting more and more attention. The main function of human retinal retina is to feel the light. If for some reason the retina of this function was destroyed, it can cause varying degrees of visual function change, or even blindness. The reason why older people have macular degeneration, the reason is not yet fully understood, and some hereditary, but most of the elderly change, because the macular nutrition mainly from the choriocapillaris layer, if the elderly in this area choroidal artery or microvascular sclerosis, then May cause macular atrophy. Some people think that the elderly are the body’s elastic tissue degradation, accompanied by the gradual degeneration of the elastic fibers in the glass membrane. Light only showed macular drusen, pigment disorders, central reflex disappeared; severe cases of cellular cysts, edema, out