Teenagers are a high incidence of myopia, to prevent myopia, we must start from the details of daily life and form good habits. Pay attention to the following aspects to help prevent myopia: 1. Do not spend too much time reading or writing homework. Every 40 to 50 minutes, you should take a break or look far away to relieve eye fatigue. 2. Develop the correct posture for writing and reading, do not lie on the table or twist your body. Note that books and eyes should be kept about one city feet. School desks and chairs should be suitable for the size of students. 3, reading and studying when the lighting light should be appropriate, the light is best from the left side of the light. Do not read and write in places where the light is too dark or too bright, to reduce the burden on students and ensure a 10-minute break between classes to reduce visual fatigue. 4.Actively carry out physical exercise to ensure that students have one hour of physical activity every day. 5. Teach students to write, do not be too small and too dense, and do not write slanted or cursive characters. Do not take too long to write. 6, seriously do eye exercises, at least three to four times a day, when the eyes feel sore and sleepy more by doing eye exercises to relieve eye fatigue. 7.When watching TV, pay attention to the height of the TV set should be level with the line of sight; the distance between the eye and the screen should not be less than 5 times the length of the diagonal of the fluorescent screen; when watching TV, the room should be open to a small bright electric light, which is conducive to the protection of vision; after watching TV continuously for 1 to 1.5 hours to have a short break eyes to look into the distance, do eye exercises. 8, should eat more food rich in A vitamin various vegetables and animal liver, egg yolk, etc., eat less sweets. The prevention of myopia should start with the children, to cultivate the correct eye habits. If you find that your child’s vision is declining, you should go to a regular hospital for a standardized examination to analyze the cause of your child’s vision decline in order to take the correct treatment measures.