The current stage of myopia surgery is mainly excimer laser surgery, which includes all-femtosecond laser surgery, femtosecond laser plus excimer laser surgery and all-excimer laser surgery, all three of which have certain risks. The main risks of these surgical procedures are: first, the risk of infection that can occur with any surgery. If a serious infection is encountered, it can seriously affect the vision and even lead to the removal of the entire eye, although the rate of occurrence is of course very low. The second problem is refractive regression. After the surgery, myopia may reappear in rare cases, called refractive regression. The third, individual patients will have corneal clouding after surgery, the medical term is called HAZE, is a certain chance of occurrence, but through the point of hormonal eye drops, HAZE is able to slowly subside. The fourth article, some people will have cone corneal after surgery, need to be a detailed examination of the cornea, if the patient has a tendency to cone corneal prohibited to do surgery. The fifth article, the post-operative dry eye situation, after the surgery, some patients will feel a dry eye, eye astringency and such uncomfortable situation. Sixth, because the corneal area cut by the surgery is not the whole cornea, about 6-8mm, some people will use the peripheral cornea to see things at night due to the dilated pupil, which will cause glare, such as looking at the lights at night, there will be a peripheral halo situation.