The main reason for the formation of myopia is the continuous close eye use for too long, students come home from school every day, buried in a large amount of homework, or long time to watch TV and play computer, is the main time and space to “create” myopia. Classes in school are generally not easy to suffer from myopia, because the blackboard distance from the nearest students to 2 meters away, in order to see the blackboard fonts brought to the eyes of the regulation of the burden is small, and in the classroom, the two eyes are in the non-stop sometimes look away, sometimes look close to the alternating movement, so it is not easy to cause myopia, while reading and writing, such as close work, the eyes need to use a larger adjustment (300 degrees of regulation). Many students have to study for four or five hours every night, some have to do their homework at noon, and on weekends they watch TV and use computers for a long time, which leads to excessive eye fatigue. Therefore, the root cause of myopia is the large amount of homework and watching TV after school, i.e., near-eye work. If there is no long-term, a large number of near-eye homework exists. Myopia rate will not be so high, for example, in the Cultural Revolution and World War II, learning was greatly affected, statistics show that the myopia rate has been reduced substantially, while in recent decades, in the knowledge to be valued at the same time, the number of myopia has also increased rapidly, the heavy learning task has become the main reason for the myopia rate of young people is constantly rising.