Why do so many children need glasses now? When we pick up the children from school, we will find that many students in the class wear glasses, and as the children grow older, the proportion of children wearing glasses is also increasing. Now myopic glasses are not an isolated phenomenon, students are under great pressure to learn, homework is sometimes written late, and some children often play with their mobile phones, all of which will lead to excessive use of their eyes. Why are there more and more children wearing childrens glasses? According to the data, the myopia rate of teenagers in China ranks first in the world, and the myopia rate of primary school students is nearly 40%. The myopia rate of high school students and college students with heavy academic work has accounted for 70% of the total, and the number of myopia has reached 600 million in 2018. In the impression of most people, children wear glasses because they spend too much time reading books or electronic products, resulting in excessive myopia. In fact, this is only part of the reason. The three reasons that lead to myopia are the key. With the discovery of the Internet, many children like to play with their parents' mobile phones or tablets since childhood. When the children are a little older, they will have their own electronic products. These electronic products emerge in endlessly. It is also common to play with your cell phone in bed after turning off the lights at night, so staring at the screen in the dark for a long time will put a great burden on your eyes, and excessive use of your eyes can easily lead to myopia. Some students are myopic because of academic pressure, they often do homework late, sometimes reading only by a dim small lamp lighting, children's eyes can not get rest for a long time, but also easily lead to excessive use of eyes to cause myopia. Some parents find that they have protected their children's eyes very well, why is the baby still myopic? It's really not the kid's problem. Such children's myopia mainly comes from parents' inheritance, some parents' familial inheritance, some parents have high myopia, so there is a certain probability of inheritance to children. If parents find that their children are young, the lenses are already very thick and the degree is relatively high, then it is very likely that the child is nearsighted due to genetic reasons, which is uncontrollable. Some children do not wear glasses because of nearsightedness, they just pursue fashion trends and think that glasses can improve their appearance and temperament.