It is an undisputed fact that the incidence of myopia in the population is increasing and tends to be at a younger age. There are many different reasons for this, and many studies have been conducted, but what is causing so many children to wear glasses? Why are there so many fewer students wearing glasses 30 years ago? Logically, it is easy to immediately think of the difference between these two eras. For one thing, the burden on children’s eyes today is relatively heavy. These two things can be described as overwhelming and unstoppable in the city. Children who are constantly exposed to these modern technological achievements often have their eyes exposed to visual targets that flash at a high frequency, and these targets all have one common characteristic – they are attractive and easy to make children enthusiastic and addicted, so the eye fatigue is self-evident. Classroom teaching is also very different from that of 30 years ago, with the massive use of projectors replacing the traditional chalkboard style of teaching, which has the same impact as the modern technology products mentioned above. There are also some links that parents generally do not easily notice, for example, in a considerable number of kindergartens, let children watch animation what has become a natural means of teaching, whether it is the current high or low cost, you can easily find this problem, and, often, children are exposed to the TV screen for 2-3 hours in a row is not uncommon, on the surface, it seems that the children All very well behaved, but also to avoid the outdoor activities may appear the so-called “danger”, the work of teachers have become simple and comfortable, but, kindergartens never take into account the children’s visual health, this practice in fact, there are great hidden dangers, in addition, in the end, or a social problem. Second, the safety of children’s food environment is also relatively worrying. The residue of pesticides in food is an indisputable fact, and the main component of pesticides is organophosphorus, organophosphorus poisoning, the human eye is in a state of regulatory spasm, what is meant by regulatory spasm? Simply put, the state of the eye when overuse or fatigue is similar to the regulatory spasm. Now and the previous school is different, before is basically the nearest school, most students can go home at noon to eat lunch, but not now, the complete opposite, most students are in school to eat lunch, as for the safety of the two meals, which is higher or lower, here is not good to impose comments, we have their own public opinion, so, the reason is self-evident.