Conditions for laser surgery: Excimer laser surgery requires that the patient be at least 18 years old, have a stable myopia for at least two years, and not be combined with other eye diseases such as keratoconjunctival inflammation, lacrimal sacculitis, dry eye, glaucoma, etc. Generally, the excimer clinic will require a set of pre-operative examinations to meet the criteria before the surgery can be performed. Surgery classification and price: Currently, the common procedures are PRK, LASIK, LASEK, Trans-PRK, femtosecond laser, etc. The price level varies depending on the procedure, ranging from 4000 to more than 10,000, with all-femtosecond laser and Trans-PRK being the most advanced. Common surgical risks: post-operative dry eye, night glare, myopic regression, corneal infection, cone cornea, etc.