After years of clinical practice and millions of cases of clinical results have proved that excimer laser surgery is by far the safest and most effective refractive surgery, but it must be reminded that excimer laser surgery is a highly selective surgery, and its “safety and effectiveness” is based on detailed and standardized preoperative examination, reasonable surgical design, skilled surgical techniques, high-quality surgical equipment and perfect postoperative follow-up based on any one of the errors will directly affect the results of the surgery. Its “safety and effectiveness” is based on detailed and standardized preoperative examination, reasonable surgical design, skillful surgical techniques, high-quality surgical equipment and perfect postoperative follow-up, and any mistake in any of these will directly affect the surgical effect. Generally speaking, the level of excimer laser surgery in China has been synchronized with the world’s advanced level, and is in rapid and steady development.