Myopia is the most common eye disease in modern society. As the pace of social life accelerates and the pressure of students’ studies increases year by year, the incidence of myopia also increases year by year, and myopia affects higher education, employment and military service. Myopia treatment has always been a very hot topic, from eye exercises to various physical therapy instruments, from gradient lenses to corneal shaping lenses, from the earlier RK surgery invented by Russian ophthalmologists to the current mainstream excimer laser surgery, it can be said to be a hundred flowers, a hundred schools of thought, so many treatment methods for myopia patients also fell into the five fog, in the end that method is the safest and most effective? Professional ophthalmologists tell us that among all myopia treatment methods, surgery is the only myopia treatment method that can achieve complete lens removal, and excimer laser treatment is the most mature, safe and reliable among all myopia surgeries. How does the excimer laser work to correct myopia? Let’s take a look at the principles of excimer laser surgery. In fact, it is very simple to say, many fashionable young people like to wear contact lenses, excimer laser is through the laser cutting to change the degree of curvature of the corneal surface, equivalent to the contact lens directly on the cornea, in such a surgical process, the cornea is changed is the thickness of the thinning. Some people may ask, “If the cornea is thinner, won’t the eye become less strong? The human cornea is a layer of elastic fibrous tissue, and the central thickness of the cornea in a normal person is approximately 550 microns. Many studies have confirmed that as long as the thickness of the cornea remains above 250 microns, it is sufficient to resist the action of intraocular pressure on the wall of the eye. Therefore, even if 1/3 or even 1/2 of a normal human cornea is removed, the remaining corneal tissue still provides safe protection for the eye. With the development of medical technology, the introduction of the femtosecond laser has brought excimer laser surgery into the era of all-laser surgery, and now there is no longer a need for a “knife” to open the eye. The original laser surgery because first in the cornea to do a tipped flap, so in the process of surgery need to use mechanical corneal knife; and now, this process has been replaced by femtosecond laser, femtosecond laser is a very high energy density of the laser, can be in the cornea for precise “sculpture”, the use of femtosecond laser production of corneal flap more This makes our laser surgery even more perfect. Some people may ask, “Is there a rebound after myopia surgery? Excimer laser surgery is intended for adults who are 18 years of age or older. Generally speaking, after the age of 18, eye development has stopped and the myopia has stabilized. However, if the patient does not pay attention to eye hygiene after surgery, prolonged close eye use will still cause myopia to deepen, resulting in the so-called rebound. Excimer laser surgery is a very cautious technique because the surgery is performed on a healthy eye. Therefore, the preoperative examination is very careful and strict, requiring an all-round evaluation of the patient’s eye to ensure that the surgery will achieve satisfactory results. Some patients cannot undergo surgery for certain reasons, such as the cornea itself is too thin, the corneal curvature is too high, the myopia is too deep, and there is a combination of retinal diseases, etc. Some serious cases circulating on the Internet that even led to patients’ blindness were caused by the lack of understanding of this surgery in the early development of excimer surgery, and the surgery was performed on some patients who should not be operated. Therefore, as long as the indications for surgery are strictly controlled, myopic laser surgery is very safe.