1.Self-care ability and parental supervision are required. (2) Have good corrected vision and no other diseases that affect wearing except refractive error in both eyes. (3.Myopia below -6.00D, cis-regular astigmatism ≤-2.00D, retro-regular astigmatism ≤-1.00D (special design may be considered for high refractive error and high astigmatism or the suitability of wear may be determined based on the final examination results). 4.Children with rapid myopia development; adults who wish to improve their naked eye vision through non-surgical solutions, such as physical examinations, athletes, police officers, etc. 5, clear motivation, able to understand the mechanism of action of keratomileusis, and have very good compliance, able to follow medical advice and review on time. 6, have a certain economic base, can afford the cost of the correction period.