The most frequently asked question by many myopic friends is: Is myopia surgery safe? Therefore, I have combined my past surgical experience to answer this. 1. Currently, there are two types of lasers, femtosecond laser and excimer laser, used for myopia correction surgery. Femtosecond laser is a high-tech laser applied in ophthalmology in recent years, with high precision cutting function, mainly used for corneal flap making, and corneal stromal lens removal, avoiding the complications of corneal knife. Excimer laser is mainly used to remove corneal stroma and correct myopia astigmatism treatment, the whole process of laser treatment is controlled by computer with automatic eye tracking system, each laser pulse cut off 0.25μm, so that the treatment reaches the perfect realm of high safety and precision, for 193 millimeters of ultraviolet light, which cannot penetrate into the eye, so there is no reason for after-effects to appear again several years after treatment. 2, laser myopia correction surgery and other surgeries, the same risks exist. There are two main types of common: 1) poorly made corneal flap. Corneal knife in the production of corneal flap may be poorly made, may cause vision loss, but now can choose femtosecond laser production of corneal flap, can avoid such risks. 2) Optical complications. Myopic undercorrection, overcorrection, and vision regression cannot be completely avoided, but laser patching can be performed and normal vision can be restored as well. In cases of decreased visual quality, such as decreased contrast, glare, halos and decreased best-corrected visual acuity, individualized laser cutting modalities such as F-CAT (Q-value guided), T-CAT (corneal topography guided), A-CAT (wavefront surface aberration guided), and KAPPA angle adjustment can be selected to improve surgical accuracy, which can greatly reduce optical complications such as decreased visual quality, and even if If they do occur, they rarely affect the quality of life and can disappear or resolve on their own with prolonged surgery time.