Myopia is caused by a disproportion between the refractive power of the eye and the length of the eye axis. In infancy and early childhood, the length of the eye axis is short and slightly farsighted, but as the child grows taller and the eye grows, the eye axis lengthens and the child’s vision develops from farsightedness to orthophoria. If you use your eyes too much at close range during the periods of “0 to 3 years old,” “3 to 6 years old” and “adolescent development,” and if your posture is not correct, the eye axis will elongate early and your orthopia will become Myopia. To prevent myopia at an early age, parental supervision and guidance is the key to preventing and delaying the deepening of myopia in adolescents. Parents should supervise their children to pay attention to eye hygiene. First of all, parents should consciously create good lighting conditions for their children, when reading and writing, eyes should be kept about 1 foot from the desktop, and light should come from the left or left front, so that the shadow does not block the light. Eye time at a time should not be too long, after more than 40 minutes of eye relaxation, you can put your eyes to see the farthest thing within reach, you can also close your eyes to rest, do eye exercises, pack and parents chat. Reading and writing should be done in a proper posture, not in bed or in an open car. Do not use your eyes in places where the light is too bright or too weak. When watching TV and computer, pay attention to have the correct viewing distance of 5 times the length of the diagonal of the monitor. Participate in more outdoor activities, especially physical exercise, such as playing ping pong, badminton, etc., the eyes stare closely at the shuttle to and from the incoming ball, the eyes are constantly moving, blood circulation is enhanced, the eyes can improve the function of the eyes, can eliminate or reduce eye fatigue, effective prevention of myopia. To eat a balanced diet, eat less sweets. It is also necessary to insist on doing eye exercises carefully, although eye exercises cannot cure myopia, but can effectively relieve eye fatigue. Parents should always tell their children about the dangers of myopia, so that children know how to prevent near, so that children consciously develop good eye habits. Regular vision checks, found to have myopia, promptly take corrective measures.