What is the method of preventing and controlling myopia: first, control the distance between eyes, avoid using eyes too close to each other, insist on one foot, one fist, one inch, and pay attention to look into the distance after long time of using eyes to take a rest of eyes. Second, increase outdoor activities, must have more than two hours a day, or more than ten hours a week of outdoor activities. Third, cultivate the correct habit of doing eye exercises. Fourth, improve the lighting environment, avoid studying under dim light. Fifth, ensure sufficient sleep, so that the eyes get enough rest. Sixth, cultivate good reading habits, do not lie down to read; do not play with cell phones, do not read or play with cell phones in a moving car. Seventh, control the use of electronic products, the cumulative total of no more than one hour a day. After using electronic products to study, after thirty or forty-five minutes, you should try to rest, look into the distance and relax. Eighth, once myopia occurs, must go to the professional ophthalmology optometry, with appropriate glasses or corneal plastic lenses, to prevent glasses degree increase.