20 1 1 year number of myopia in China.

About 450 million people. According to the inquiry, in 20 1 1 year, the total number of people over 5 years old in China was about 450 million. According to the national vision health report at that time, the social and economic cost caused by various vision defects in 20 12 years was more than 680 billion yuan, accounting for 1.3% of GDP in that year.