Myopic arcs are the most common fundus change in myopic eyes. The smallest are not easily visible, and the largest can reach the size of the optic disc. Some surround the optic disc, or even reach the macula. If the myopic arc does not invade the macula, it has little effect on vision; if it invades the macula, vision (including near vision) is significantly reduced. Myopic patients want to avoid myopic arc, the most important thing is to prevent. 1, correction of refractive error The lowest degree but the best vision is the most appropriate. However, sometimes the prescription is too high and the patient is uncomfortable after wearing glasses, it is necessary to properly reduce the prescription to maintain better vision and the patient can accept it to relieve the visual fatigue caused by excessive collection. In addition to wearing glasses, corneal contact lenses can be used to reduce the visual size and distortion caused by wearing glasses, and also to expand the field of vision. Radial keratotomy and the recently developed excimer laser can be used to correct myopia, but the correction of high myopia needs further study. 2, maintain visual hygiene Good eye habits are extremely important. If you don’t read while lying down or walking, lighting should be appropriate when doing close work, not too dark or too strong, light is best from the upper left, sitting posture should be correct, head distance from the object of vision can not be too close, generally 33cm. each reading time should not be too long, generally a time lasting 45min ~ 1h is appropriate, when resting eyes to look away, so that eye relaxation rest. You can do eye exercises to relieve visual fatigue. These visual health education is especially important in adolescents. 3, strengthen physical and mental health exercise This is especially in the adolescent development period, to have good eating habits, not partial food or overeating. Appropriate outdoor exercise and sufficient sleep to protect physical health and spirits to study or work, thus contributing to the development of vision.