Excimer laser treatment for myopia was first used clinically in the United States in 1985 and was introduced to China in the early 1990s. The mature development of laser surgery in China was not until the early twenty-first century, but the current annual volume of surgery nationwide is still far less than that of the United States. The current technical equipment in China is no more than 5 years old compared to foreign countries. This gap is mainly related to the domestic economic situation and the Food and Drug Administration’s medical device access cycle. The surgical results and safety of excimer laser treatment for high, medium and low myopia are far superior to previous refractive surgery and is currently the preferred method for treating adult myopia. The excimer laser is a gas laser, which has a photochemical rather than a thermal effect with biological tissue, but the procedure also produces very little thermal effect, so a small amount of burnt protein will be smelled. Therefore, there is no need to worry about thermal damage. The excimer laser is an ultraviolet light with a wavelength of only 193 nm and penetrates to an extremely shallow depth, so no damage is done to the intraocular tissues. Moreover, each pulse can only cut to a depth of 0.25um and the cutting is extremely precise, so it is not possible to penetrate the eye under normal circumstances, unless the machine malfunctions. All current excimer lasers have an infrared tracking system, where the laser actively tracks the movement of the eye, and if your eye deflects too far, the laser will automatically stop firing to ensure safe treatment. The basic principle of laser treatment for myopia can be simply understood as using an excimer laser to grind a pair of lenses on the cornea of the eye. Therefore, it is crucial to have enough corneas to grind. There are various methods of laser treatment for myopia, such as LASIK, LASEK, wavefront aberration-guided laser surgery, and all-laser surgery. The specific method should be chosen according to the doctor’s recommendation, and either one can achieve good results. People who are suitable for excimer laser treatment: 18 to 50 years old, myopic eyes with stable prescription in the past two years; myopia below 1000 degrees; hyperopia 200 degrees to 800 degrees. People with infectious inflammatory diseases, cone corneas, glaucoma, cataracts, fundus lesions, or systemic diseases such as diabetes or collagen diseases are not suitable for excimer laser treatment. A comprehensive eye examination is required before myopic laser surgery, including: 1. Vision examination: including bare eye vision and best corrected vision. 2. Refractive examinations: dilated pupil examination and re-testing. 3. Optic field and fundus examination: focus on corneal, crystalline and fundus retinal conditions. 4. Intraocular pressure examination: exclude high intraocular pressure and glaucoma. 5. Corneal thickness: central thinnest point. 6. Corneal topography examination: surface curvature condition and exclude cone cornea. The current market for excimer laser treatment for myopia in China is a mixed bag. Many of the devices that should have been eliminated are still “playing” and the level of doctors varies, so it is recommended that regular hospitals be preferred for treatment. After all, there is only one pair of eyes.