When it comes to laser surgery for myopia, people are most concerned about safety issues. However, today’s excimer laser surgery has entered the “knifeless” era, the entire surgery using the “femtosecond laser” for flap making, the accuracy of the surgery greatly improved, and there is no “tangible” blade during the operation The laser is used to make the flap, which is much more accurate, and there is no “visible” blade during the surgery, which can avoid cross infection and greatly improve the safety of the surgery. The femtosecond laser can precisely open the molecular chain of the eye tissue and create a more uniform and perfect flap, effectively reducing possible medical aberrations and reducing glare and blurring in foggy days, rainy days and night driving conditions, allowing myopic patients to achieve perfect visual quality. From “knife” to “no knife”, from manual to computer, from anatomy to physics, is the inevitable trend of medical development. The emergence of “femtosecond laser”, so that for the first time in human corneal surgery away from the scalpel, the true realization of the “whole knife surgery”, the laser myopia surgery to a more accurate, safer, more reliable new height. Will my eyes go blind if the surgery fails? The first of the five senses, many people worry about a problem before doing myopia surgery, and that is whether the surgery will cause blindness? In this regard, ophthalmologists said that the principle of myopia surgery is through the short wavelength of ultraviolet light, which is a cold laser will not produce thermal damage, its penetration is very weak, each pulse is 0.25um depth, cutting is very accurate; myopia surgery is computer-controlled surgery on the cornea, does not involve the eye, no impact on the intraocular tissue, so there will be no blindness. However, myopia surgery has strict contraindications to surgery, so a strict pre-operative safety check must be performed before surgery to determine if you are suitable for surgery, and then the doctor will design a personalized surgery plan that suits you based on the check data.