All ball sports have a positive effect on myopia prevention and control, such as basketball, soccer, etc. So parents can supervise and lead their children to play more ball sports, so that they can watch less TV and use less computer to reduce the incidence of myopia. 8 good habits can prevent myopia 1, do not read in direct sunlight or in the dark, do not lie down, lying down or walking, reading books when riding in the car. 2, must pay attention to personal eye hygiene, keep the area around the eyes clean. 3, pay attention to diet and nutrition, eat more food containing vitamin A, such as goat liver, pig liver, eggs, milk, carrots, vegetables, etc. Promote outdoor active rest and frequent far-seeing, 3-4 times a day, at least five to ten minutes each time. 4.Don’t be partial and picky about food and don’t eat too much sugar. 5.Prevent excessive eye use, do not work at close range for more than 50 minutes at a time, and take a 10-minute break every hour to relax the regulation of extreme vision, which can prevent myopia. 6, when doing homework in class to blink often, when you feel eye fatigue, you should close your eyes for half a minute, but do not rub your eyes, this will help to prevent myopia. 7.Establish a system of eye exercises, regular vision checks, and effective measures should be taken promptly for students with low vision. 8, the classroom should have good lighting conditions, tables and chairs should be appropriate height, classroom size is appropriate, the distance between the blackboard should be moderate, not closer than 2 meters, far not more than 6 meters, the distance between the eyes and books when studying to maintain at 30-35 cm, the blackboard should not reflect, the print used should be clear, the contrast should be sharp, students seating front, back, left and right should be regularly switched. Protect vision can eat more 2 types of food 1, chromium food chromium is also an essential mineral element, the role in the development of the eye is to keep its osmotic pressure in balance, otherwise it can lead to the lens bulge convex, resulting in an increase in the refractive error of the eye, and become myopic. According to experts’ calculations, children need about 50-200 micrograms of chromium per day. Chromium-containing foods are: cereals, meat, cheese and egg yolk, etc., should be arranged more for children. 2, calcium food Calcium is a mineral element that we are familiar with and pay much attention to, but everyone’s knowledge of it is still focused on enhancing bone development and preventing rickets in children, rarely linking it to the development of the eyes, but medical experts have pointed out that calcium deficiency is one of the important causes of poor vision development and even the formation of myopia. The scientific basis is that the eye is like a plastic capsule full of water, if calcium deficiency, its “hydraulic pressure” will be high and low, can not maintain the normal state, this condition is like a light bulb is on, it is easy to be high and low voltage burned out. If the eye lacks calcium, it can cause abnormal development and form myopia. Calcium-containing foods include: milk, soy products, fish and shrimp, animal bones, etc. Attention should also be paid to matching animal liver, egg yolk, green vegetables and other foods rich in vitamin D to increase the absorption and utilization of calcium.