LASIK, or Laser in Si-tu Keratomileusis, is a new, more complex procedure for high myopia. The procedure is performed using an automated miniature corneal lamellar laparotomy, which cuts an 8 mm diameter, red 0.16 mm thick lamellar cap on the corneal surface, flips the cap, applies an excimer laser computer-controlled multi-step zoned corneal stromal cut, and finally resets the cap without sutures. This approach preserves the integrity of the corneal epithelium and anterior elastic layer, and the 193 nm excimer laser is used to cut the corneal stroma, avoiding the occurrence of postoperative haze clouding. This surgical approach is a major innovation in the surgical treatment of high myopia and can correct up to 3500 degrees of myopia. Many patients have higher postoperative visual acuity than their preoperative best corrected visual acuity with lenses and fewer complications, and its efficacy has attracted widespread attention.