A cataract patient waits to be examined inside a hospital in Xilinhot, Inner Mongolia September 21, 2007. Cataract is a major cause of blindness around the world. There are at least 1 million new cataract cases each year in China. The total number of cases could balloon to 167 million by 2020 because of an ageing population, according to ORBIS, a group that aims to treat and prevent blindness in developing countries. Picture taken September 21, 2007. To match feature HEALTH-CHINA/CATARACTS