After myopia appears, whether to wear glasses for a long time depends on the degree of myopia and the size of the impact of myopia on vision. If the myopia is mild, such as 200 degrees or less, the effect on the bare eye vision is not very big, so normal life or work is not affected too much, so at this stage you do not need to wear glasses for a long time, you can wear them during classes, but not when you go out. But if the degree of myopia is very large, such as more than 200, or even higher, this situation has caused a serious decline in vision, this time we need to wear glasses for a long time, only then can maintain clear visual quality, to avoid eye fatigue, but also to slow down the development of myopia.