Myopia is a relatively common disease of the eye, and the precursors or early manifestations of this disease are generally twofold: first, there will be a mild loss of vision, so you like to squint when you look at things. Because in the squinting state, the shape of the cornea is changed, so it will offset part of the myopia, so see relatively clear. The second, the symptoms of eye fatigue, due to vision loss, so it is easy to lead to eye fatigue. So in the case of frequent reading or using electronic products for a long time, it is easy to have dry eyes, soreness, pain and other performance, which is caused by fatigue to the performance. With the deepening of myopia, vision will further decline, so for this disease of myopia, must be detected early, early treatment.