Factors Causing Myopia The survey results analyzed that family members with a family history of myopia have a higher rate of myopia than those without a family history of myopia, indicating that the onset of myopia has a certain relationship with heredity. In other words, although there is a genetic factor, it does not mean that the next generation of myopia patients is necessarily myopic, but only that the next generation of myopia patients is myopia susceptible. However, research has also found that the development of myopia is also affected by acquired environmental factors. If the illumination of visual objects is poor, reading and working at close range for a long period of time, the eye’s regulating muscles are in a state of constant tension and contraction, and myopia may also occur in some families without a genetic history of myopia. Therefore, the medical profession currently believes that myopia is the result of the combined effect of heredity and environment. Methods to prevent myopia 1, mothers should pay attention to their own health and nutrition during pregnancy, and eliminate infections, so as not to affect the development of fetal eye function; 2, children should pay attention to eye hygiene, to reduce the role of environmental factors in the onset of myopia, such as the establishment of good lighting, to develop correct reading habits and posture, less TV, less use of computers, and once the occurrence of myopia should be timely with the appropriate glasses. 3, children in the developmental period can not be partial food, should strengthen the food intake of nutrition, nutritional balance, eat more food beneficial to the eyes, such as vitamin A-rich food. 4, appropriate physical exercise, enhance physical fitness, participate in outdoor activities, promote children’s vision development. 5. In order to avoid heredity of high myopia, it is better for both partners in a relationship not to be highly myopic at the same time, so as to ensure the health of the next generation. Parents should pay attention to their children’s eye health, children should go to the hospital to do a comprehensive eye examination at the age of 3. Children’s eye development is the fastest before the age of 8. Parents and friends had better bring their children to the hospital to do an eye review once a year, pay attention to it at any time, and treat it as early as possible.