According to the survey, the population of China myopia incidence was 33%, for the world's average level 1. 5 times; The number of myopia nearly 400 million, teenagers for myopia high-risk groups, incidence of myopia is as high as 50% to 60%.
the reason, many more, one is related to the classroom lighting light. Today, let's lighting the mysteries of the learning school.
Bober
AALD