Experts say that the process of developing myopia in children can be divided into the following steps: physiological hyperopia, orthopia, and myopia. Generally, children between the ages of 3 and 4 have about 200 degrees of physiological hyperopia, which can “protect” them from myopia, and if the physiological hyperopia of children in this age group is less than 50 degrees, then the chances of developing myopia in the future can reach 60-70%. Children’s farsightedness reserve is easily depleted by various bad habits, so it is even more important for parents to correct it in time. For children’s vision problems, parents should find ophthalmology for integrated scientific prevention and control, never judge for themselves. Once myopia is formed, it is almost irreversible, but the speed of its development can be controlled through scientific intervention. Bad habits” that cause myopia include improper posture in reading and writing, sleeping too late, lack of light and other major causes. Many children and parents think that after homework, they can watch TV, play cell phones and video games to relax and let their children rest, which is wrong. Many children live in classrooms, houses, and cars, and spend less than three hours a day outdoors and looking away.