The excimer laser is a mixture of argon fluoride gas that is excited to produce a “cold laser” in the ultraviolet wavelength range of 193 nanometers. Excimer laser is one of the most advanced ophthalmic technologies available in the world. It is designed for patients with nearsightedness, farsightedness and astigmatism to eliminate or reduce the degree of myopia without the use of frames or contact lenses, or to eliminate the unnecessary pain associated with the use of other unsafe treatment methods. Excimer laser technology is a combination of modern science and multiple disciplines such as ophthalmology and optometry, requiring very strong expertise. Indications: The patient has the need to remove glasses (1) Age over 18 weeks; (2) Stable refractive error in the past two years, and its development rate is not more than 0.50D per year; (3) Corrected refractive error range: myopia 1.00-12.00 degrees; farsightedness 6.00 degrees or less; astigmatism not more than 6.00 degrees; (4) Refractive error with unequal refractive error in both eyes; (5) Wearers of corneal contact lenses ( (6) Corneal thickness greater than 460 μm; (7) No active ocular disease and no contraindications to LASIK surgery. (2) Severe corneal dystrophy; (3) Patients with retinal detachment and other fundus pathologies; (4) Patients with dry eye, cone cornea, glaucoma, diabetes, collagen disease; (5) Scarring (a relative contraindication to LASIK surgery); (6) Pregnant women and drivers who drive at night; (7) Severe amblyopes with very poor corrected vision; (8) Patients with very high visual acuity requirements and a high level of ideological concern for surgery; (9) Patients with severe amblyopia; (10) Patients with severe amblyopia; (11) Patients with severe amblyopia. (8) Those who have very high visual acuity requirements and are extremely apprehensive about surgery.