In recent years, the incidence of myopia in children and adolescents is increasing, and the development trend is low. 3 years old is the critical period of visual development, before 12 years old is the sensitive period of visual development, changes in vision (in addition to congenital factors) will be affected by the environment, think factors. Therefore, parents should pay special attention to their children’s learning, life in eye health: 1, good lighting Poor lighting quality is one of the factors that cause myopia in children and adolescents. Poor lighting quality mainly has low desktop illumination, low uniformity of illumination, light strobe, glare, etc.. Too strong or too dark light will have an effect on the eyes. Too bright light will feel blinding or dazzling, the ciliary body is tense, easily lead to eye fatigue and thus myopia. Therefore, you should choose a top light or desk lamp without strobe and good light source, and avoid studying in strong light or dark environment. 2, the appropriate distance between the eyes too close or too far, reading and writing posture is not correct, are important causes of myopia in children and adolescents. Desks and chairs on the high side, children and adolescents will be low and waist, deviating from the correct distance of vision; if the desk and chair is too low, it will make the head tilt forward, the spine is bent, the chest is pressed, eye regulation will be relatively tense, so that eye fatigue, over time, it is easy to myopia. Parents had better choose for the child can be adjusted desk and chair, so that with the growth of the child’s height, adjust the height of the desk and chair at any time. 3, standardized posture Correct reading and writing posture is vital to the physical development and vision protection of children and adolescents. The most common wrong reading and writing posture is to read and write with a crooked head, or the habit of lying down and reading with a low head. Reading and writing posture should be correct, books and eyes to maintain a foot distance; the plane of the book and the angle of vision as far as possible to maintain 90 degrees, so that the image formed on the retina is the clearest. A fist distance should be maintained between the body and the desk. Keep an inch distance between your hand and the tip of the pen when holding the pen. This process requires constant reminders and corrections from parents and teachers. 4, control electronic products cell phones, tablets and other electronic products, their screens are made of small flash aggregation, continuous use of more than half an hour on the child’s eyes is very large stimulation. Therefore, the child should be within 15 minutes of each exposure to electronic products. 5, increase outdoor sports A meta-analysis shows that the length of time spent outdoors each week is related to the prevention of myopia, with each additional hour of outdoor activity per week reducing the chances of myopia by 2%. This corresponds to a 13% reduction in myopia for each additional hour of outdoor activity per day. Studies from the Sydney Myopia Study and Southern Taiwan have also confirmed that outdoor activity can reduce the incidence of myopia and reduce the prevalence of myopia in children. In addition, children should eat less sweets. Excessive sugar intake not only tends to damage the teeth, but also affects the development of vision. Myopia also has a relationship with lack of sleep. Children and adolescents should sleep 9 to 11 hours a day, and take a lunch break at noon.