Safety issues: Excimer laser treatment for myopia is one of the safest surgical procedures in the world. This technology was first researched successfully in the 1980s in the United States. Japan. In 1993, with the approval of our Ministry of Health, clinical trials were first carried out in major hospitals in Beijing and Shanghai, and then pushed to the whole country, and so far more than 600 hospitals have carried out this surgery and 40 million people have been treated. The myopic astronauts in China and the United States have also been allowed to undergo excimer surgery. If there are safety risks, the Ministry of Health will not allow it to exist and develop. Second, the sequelae problem: Excimer laser is a cold laser that is so precise that it can be engraved in the hair. The surgery is carried out within the scientifically set boundaries of corneal remodeling, there is no thermal effect when cutting corneal tissue, no damage to other tissues, no lesions left in the eye, so there are no sequelae. Third, the rebound problem: the human cornea is like a convex lens, change its refractive power, it can change the focus, so that the focus falls on the retina, myopia problem is solved, the remodeled cornea, will not return to the original look, wear thin lens will not become thick, so the possibility of myopia again is very small, normal eye will not be myopic again. Fourth, the effect of the problem: Excimer laser treatment of myopia is predictable, as long as your corrected visual acuity can reach 1.0, patients and doctors work closely with the surgery can do 1.0 or better, and long-term remain unchanged.