The eyes are the windows to the soul and the windows through which people observe the world. 90% of the information people obtain about the outside world is “seen” through the eyes. This shows how important our eyes are to us. Myopia is one of the most common eye diseases among human beings. Excimer laser surgery has been performed in China for more than a decade, and thousands of myopic patients have benefited from it. At present, the main methods of excimer laser surgery are: 1. Excimer laser keratomileusis: it has been replaced by excimer laser in situ keratomileusis. 2. 2. Excimer laser in situ keratomileusis: This is the most performed myopia surgical treatment in recent years. The principle of excimer laser in situ keratomileusis is to cut a slab of the cornea and then use a laser to cut away part of the central corneal stroma to reduce the corneal refractive power and correct myopia. Excimer laser in situ keratomileusis has the following advantages: (1) The procedure is quick and painless during and after surgery. (2) Fast recovery of vision after surgery. The postoperative period is only one day with a blindfold, which does not affect daily life. (3) The postoperative medication time is short and rarely causes hormonal glaucoma. (4) Very little scar formation in the cornea after surgery. (5) Satisfactory results, good stability, high safety, and significantly better correction effect for high myopia than laser optical keratomileusis surgery. Indications for molecular laser in situ keratomileusis surgery: (1) Age 18 years or older. The refractive error is stable for more than 2 years. (2) Corrected visual acuity greater than 0.5. (3) No ophthalmic organic lesions or acute inflammatory diseases. (4) No scarring and collagen connective tissue disease. Patients with contact lenses should stop wearing contact lenses for more than 1-2 weeks. Excimer laser corneal subepithelial molars: The laser will cut off a part of the central corneal stroma under the corneal epithelial flap to reduce the corneal refractive power to correct myopia. Because the epithelial flap is thin, this solves the thickness problem for patients with relatively thin corneas and high degrees, and improves safety. 4, optimal personalized cutting excimer laser corneal surgery: from the development of excimer laser refractive surgery, surgery has undergone excimer laser corneal cutting, excimer laser in situ keratomileusis, excimer laser subepithelial keratomileusis, optimal personalized cutting excimer laser corneal surgery, the current formation of excimer laser in situ keratomileusis and excimer laser subepithelial keratomileusis The main streams coexist, and the new trend is optimized personalized excimer laser corneal surgery.