1. Excimer laser keratomileusis is the result of the unremitting efforts of ophthalmologists and scientists in China and around the world to correct refractive errors. With the continuous progress of science and technology and the continuous improvement of medical level, this surgery has become one of the important means to correct refractive errors and provide services to meet the needs of many patients with refractive errors. Clinical practice over the past two decades has shown that the procedure is safe and effective. 2. Our ophthalmologists are cautious and serious in performing excimer laser surgery. There are relevant guidelines and operational specifications for admission, instrument management, preoperative examination, indication mastery, surgical operation and postoperative management of the procedure. 3. Any medical treatment involves certain risks, and excimer laser keratomileusis cannot be completely avoided. With the continuous efforts of ophthalmologists and advances in technology, the immediate and long-term complications of this surgery are very low. Even if complications occur, they are manageable and treatable with timely treatment.