Myopia is a common disease in ophthalmology. This disease is usually due to congenital genetic factors, acquired bad eye habits, resulting in the refractive state of the eye exceeds the normal range, so it will cause vision loss, this vision loss compared to the normal eye, mainly manifested as a decline in distance vision, that is, when looking at the distance is very blurred, the greater the degree of myopia, the more obvious this blurred symptoms. However, near vision is still normal, that is, when reading at close range, you can see clearly without glasses, which is a manifestation of myopia. Myopia can easily cause changes in the shape of the eye, such as protrusion of the eyeball or posterior scleral chylomalacia in myopia of 600 degrees or more, and fundus examination can also reveal fundus lesions in highly myopic eyes, all of which need to be checked in the hospital.