Adolescence is the most vigorous growth and development stage, especially between the ages of 7-14, the changes are particularly obvious, coupled with heavy study, long hours of close reading and writing, more eye use. If you do not pay attention to eye hygiene, it is easy to cause visual fatigue, vision loss, leading to myopia. When you find that your child loves to squint to look at things and complains that he or she cannot see the words on the blackboard in class, it means that your child’s vision at a distance is already bad, and you should take your child to the hospital for examination and early treatment. If the child further appears to read and write with the books close to him or her, and reads for a long time easily, such as eye swelling, soreness and other visual fatigue, it indicates that the degree of myopia has increased again. When possible, parents should take their children to the hospital for a detailed eye examination during each holiday to help detect myopia or other eye diseases at an early stage, so that they can be corrected and treated early.