The first thing children need to do to protect their vision is to meet two or more hours of outdoor activity each day. Outdoor activities allow children to be fully exposed to light, and sufficient light can control the growth of the eye axis and prevent and reduce the occurrence and development of myopia. Second, good eye habits should be developed. Good eye habits include time spent with the eyes, sitting posture for reading and writing, and adequate light exposure. Sitting posture is generally required to have a fist distance from the table, eyes from the book is a foot away, holding the pen finger is an inch away from the pen tip, generally is such a reading and writing posture. And read and write time to control in about 30-40 minutes, rest about 5 minutes, rest time look away. Try to reduce the use of electronic devices, especially children, if the use of electronic devices too much, it is easy to lead to myopia. Finally, pay attention to the diet, try to eat less high fat, high greasy or high sugar food, reasonable diet, to eat high protein or green vegetable food, will also feel better.