At present, myopia surgery is mainly divided into two categories, one is corneal surgery, mainly laser surgery, and the other is intraocular lens implantation for patients with high myopia or patients with thin cornea who are not suitable for laser surgery. There are many ways of laser surgery. Now we often say that laser surgery mainly includes three kinds of surgery: the first is to make corneal flap with mechanical knife, and then use excimer laser to cut cornea to correct myopia; The second is to make corneal flap with femtosecond laser and then cut it with excimer laser; The third is to completely remove a corneal stromal lens with femtosecond laser, that is, full femtosecond laser surgery.