Myopia prevention and control in children is a constant topic and hot topic in China. In this article, we refer to some medical literature on myopia epidemiology and myopia-related basic research, and introduce it to you in as plain language as possible. China is “deservedly” a myopia country, how common is myopia? How common is myopia? Please see the relevant data in recent years. Many people think that it does not matter if children are nearsighted, and that they can have corneal refractive surgery when they become adults. Unbeknownst to them, corneal refractive surgery is the equivalent of having glasses made directly on the cornea, and the hazards, risks and complications of myopia still exist. People often only know that cataracts and glaucoma have a great impact on vision, not realizing that myopia is even more harmful than the first two. Everyone is using smartphones. The phone call function of the cell phone has instead become secondary, while information exchange is the main function. When smartphones didn’t exist, I could tolerate forgetting my cell phone. Now if I don’t have my cell phone, I have a hard time without my friend circle, qq, and microblogging! How about you? The traditional eye hygiene of “one fist, one foot, one inch” is based on science! One foot = 33 centimeters. Reading time 2 hours and reading distance 750px is an important point in the occurrence of myopia, parents must pay attention to children’s close eye habits. When watching TV, the distance of TV is much farther than reading and playing cell phone. Therefore, watching TV is not so terrible. Many parents do not allow their children to watch TV, but give their children too many books to play computer, cell phone, ipad is the cart before the horse! Outdoor activities can slow down myopia, is a new result of myopia research this year. In the past, traditional food was mainly rice, noodles and grains, but in recent years, dietary habits have changed, with an increase in eggs, milk, meat and refined foods, which are high-calorie refined foods and may be associated with myopia. The effect of dietary structure on myopia is very complex, and it is difficult to draw a definite conclusion at present. However, not being picky about what we eat is definitely protective of myopia.