在全球盲人中,50%以上病因确定是因为先天或后天白内障而失明。在中国,已经失明的白内障患者大军高达500万,并以每年新增加40万例的速度在扩充。More than 50% of the blind in the world are caused by cataract.In China,the number of such kind of blind people is as high as 5 million,and increases by 0.4 million per year. In the global blind, more than 50% of the etiology is determined because of blindness due to congenital or acquired cataracts. In China, the number of cataract patients who have been blind has risen to 5 million and is expanding at a rate of 400,000 cases a year. More than 50% of the blind in the world are caused by cataract.In China, the number of such kind of blind people is as high as 5 million, and increases by 0.4 million per year.