患者一旦染上一种称之为年龄相关性黄斑变性(湿型amd)的疾病，其血管就会出现异常且会扩散到视网膜的中心，损害患者的中心视觉。
The disease is wet age-related macular degeneration (wet AMD), in which blood vessels grow abnormally and leak into the centre of the retina, damaging sufferers' central vision.
黄斑变性导致视觉扭曲甚至完全失明。
Macular degeneration causes visual distortion and even complete loss of sight.
湿性老年黄斑变性amd是欧洲和北美超过了50岁的人们的视觉减退的首要原因。
Wet AMD is the leading cause of visual loss in people over the age of 50 in Europe and North America.
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