China is a myopic country, with about 300 million people with myopia. With the progress of science and the improvement of cultural living standards, the prevalence of myopia is increasing, and myopia has increasingly become a roadblock for many people in their lives and career choices. The common methods of correcting myopia are frame glasses, contact lenses and laser treatment. Because frame glasses affect the appearance, many occupations and types of work are restricted, especially not liked by girls. Contact lenses need to be taken off and cleaned every day, which is troublesome, and if you don’t pay attention to cleanliness and hygiene, corneal infections can easily occur, causing significant vision loss. Laser treatment for myopia can completely relieve myopia, allowing myopic patients to regain a pair of bright and clear eyes. Excimer laser treatment for myopia has been carried out for more than 20 years and has benefited thousands of myopic patients. It has become one of the brightest landscapes among myopia correction methods because of its remarkable effect, less pain, faster recovery and fewer complications. Excimer laser surgery uses an excimer laser with a wavelength of 193 nm produced by argon fluoride gas to cut the corneal surface and change the curvature of the cornea to correct myopia. The excimer laser can precisely remove corneal tissue, and the cutting surface is very smooth, easy to perform and predictable. The indications for surgery are for myopic patients who are older than 18 years old and have stable myopia. Excimer laser surgery includes excimer laser keratomileusis (PRK), excimer laser in situ keratomileusis (LASIK), excimer laser epithelial under flap keratomileusis (LASEK) and excimer laser epithelial under flap keratomileusis (Epi-LASIK) with microkeratome. The application of femtosecond laser technology in recent years has further improved the safety of myopic laser correction surgery, which includes femtosecond LASIK and all-femtosecond laser surgery with femtosecond laser flaps. 1, PRK: is first scraping the corneal epithelial tissue, the application of excimer laser cutting of the central zone of the cornea, so that it flattened, refractive power is reduced, so as to achieve the purpose of correcting myopia. The advantages are simple and safe operation; the disadvantage is that the incidence of subepithelial foggy clouding of the cornea after surgery is high, especially in highly myopic eyes, haze can lead to myopic regression and vision loss. Therefore, PRK is mainly used for the correction of low to moderate myopia. 2.LASIK/Femtosecond LASIK/Full Femtosecond Laser Surgery: Traditional LASIK is performed by first using an automatic or hand-controlled microkeratome to cut a corneal flap of about 8~9mm in diameter and 100μm~160μm in thickness with a tip on the corneal surface, lifting the flap and then performing laser cutting. Because of its light postoperative pain, fast recovery, and no haze formation after surgery, it is more widely carried out clinically. However, LASIK requires the creation of a corneal flap, and most of the possible complications of the procedure are related to the creation of the corneal flap. In recent years, the application of femtosecond laser has made the flap making safer and the postoperative results better. The conventional LASIK procedure using microkeratome to make the flap has been gradually replaced by femtosecond laser flap making (femtosecond LASIK), which makes LASIK surgery safer and more effective. The latest all-femtosecond laser surgery does not require a corneal flap, and there is no visible postoperative corneal wound, avoiding the possible complications of femtosecond LASIK corneal flap surgery and making the surgery safer. 3. LASEK: After soaking in 20% alcohol for a period of time, a corneal epithelial flap is created, and then the complete epithelial flap is reset after excimer laser cutting. Unlike LASIK, LASEK does not require a corneal stromal flap and therefore does not have all the complications associated with a corneal flap, making it safer than LASIK and significantly less haze than PRK. The main shortcomings of LASEK are: postoperative irritation, slow recovery of optimal visual acuity, and the possibility of haze in some highly myopic patients. The application of intraoperative mitomycin, etc., has significantly reduced the occurrence of postoperative HAZE. At present, the postoperative discomfort can be controlled within 1 day after LASEK, and the visual acuity can be close to 1,0 at 1 week after surgery, and the incidence of postoperative haze is very low. Since there is no need to create a corneal flap, it is a better method than LASIK surgery that requires a corneal flap for the correction of patients with low myopia and thin corneas. 4.Epi-LASIK: The epithelial flap is made by microkeratome, which is more convenient to make the epithelial flap, especially for those who are not skilled in LASEK operation, and the integrity of the epithelial flap can be ensured, and there are no complications related to LASIK flap, and the patients have less irritation symptoms after the operation. At present, PRK surgery is basically replaced by LASEK or Epi-LASIK surgery, and conventional LASIK surgery using a mechanical knife to create the corneal flap has gradually been replaced by femtosecond laser surgery. In low myopia, thin corneal patients generally choose LASEK surgery, while patients with moderate to high myopia choose femtosecond laser surgery, and femtosecond laser surgery is preferred to all-femtosecond laser surgery. Each type of surgery has its own advantages and disadvantages, and each person should choose the best surgery for him or her according to their different characteristics.