The control of myopia starts with the cause of myopia. The causes of myopia are usually of two kinds: 1. congenital genetic factors, for which there is no way to control the cause. 2. acquired bad eye habits, which are controllable. In order to avoid the emergence or further aggravation of myopia, in ordinary times must pay attention to reasonable eye habits. 1, to maintain the correct reading posture, generally requires 35-40cm reading distance; continuous close eye time can not exceed two hours; minimize the use of computers, cell phones and other electronic products. 2, need to increase the appropriate outdoor time, if you can ensure 1-2 hours a day of outdoor Time, the incidence of myopia will be greatly reduced. Therefore, if there is myopia in the eyes, you need to maintain reasonable eye habits early.