Excimer laser has a particularly strong and accurate corneal shaping ability. Using excimer laser for corneal shaping is equivalent to grinding a lens on the cornea, so that this technology has a particularly ideal correction effect, so excimer laser is now the main way to correct our vision. Excimer laser surgery is suitable for the following people: 1, 18 years of age or older; 2, myopia is stable for more than two years; 3, the thickness of the cornea is suitable; 4, there is no inflammation in the eye, such as acute conjunctivitis, keratitis, etc.; 5, not in the active period of diabetes, hyperthyroidism, etc.; 6, myopia within 1200 degrees, more than 1200 degrees need to be judged by an experienced doctor. The advantages and disadvantages of excimer laser surgery: 1, completely remove glasses, beautiful; 2, myopia within 1200 degrees, correction effect is good; 3, generally only one surgery; 4, the choice of what type of surgery is critical, there are risks; 5, abuse of surgery is more common, there is a decline in visual quality, infection and other complications.