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 myopia, hyperopia and astigmatism to eliminate or reduce the degree of myopia by eliminating the use of frames or contact lenses, or to eliminate the unnecessary pain caused by the use of other unsafe treatments. Excimer laser technology is a combination of modern science and multiple disciplines such as ophthalmology and optometry, and requires very strong expertise. For example, strict and careful ophthalmological examination and evaluation of professional indexes before surgery, screening of surgical indications, accurate grasp of the surgical process, selection of surgical methods, correct use of equipment, close post-surgical visits and timely management of complications, etc. all require experienced professionals and perfect professional technical equipment for support. Indications: The patient has the need to remove glasses (1) age 18 weeks or above; (2) stable refractive error in the past two years, the 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 ( LASIK surgery is not suitable for people with active inflammatory eye disease (such as acute conjunctivitis, blepharitis, keratitis, corneal ulcers, dacryocystitis, iridocyclitis, etc.) Contraindications: (1) Active inflammatory eye disease, including conjunctivitis, keratitis and chronic dacryocystitis (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 amblyopia with very poor corrected vision; (8) People with very high visual acuity requirements and who are ideologically interested in surgery (8) Those who have very high visual acuity requirements and are extremely apprehensive about surgery.