First off this is not a stereotype or assumption. It's a blatant fact that a lot of Chinese people need to wear glasses/contacts compared to other races. Personally I think the reason are below: firstly, most Chinese people would love to stay at home to play computers or watch TV. All of those activities are not good at the development of the eyes. However, it will cause the eyes fatigue and further cause the vision loss. Secondly, a lot of Chinese student are assignment much homework which should be done with the help of computers. In fact, the people have much outdoor activities, which will help with the eye development and has a low rate to get vision impairment. Hope this helpful.