A lot of it is caused by lack of sunlight exposure. A number of Asian countries have epidemic rates of myopia: https://healthland.time.com/2012/05/07/why-up-to

A lot of it is caused by lack of sunlight exposure. A number of Asian countries have epidemic rates of myopia: https://healthland.time.com/2012/05/07/why-up-to-90-of-asian-schoolchildren-are-nearsighted/ https://healthland.time.com/2012/05/07/why-up-to-90-of-asian... https://edition.cnn.com/2015/04/05/asia/myopia-east-asia/index.html https://edition.cnn.com/2015/04/05/asia/myopia-east-asia/ind... The solution is to get children more sunlight hours for proper eye development.