Who is suitable for LASIK surgery? 1.People who have the requirement of lens removal. 2.Age above 18 years old and below 55 years old; myopia is 100-3000 degrees or less, farsightedness is 900 degrees or less, astigmatism is 600 degrees or less. 3.Refractive stability for two years, with an annual increase of no more than 50 degrees. 4.No active eye disease in eye examination. 5.Corneal thickness of 450um or more. 6.Stop wearing contact lenses for 1-2 weeks in the operated eye. 7.The refractive difference between both eyes is large. 8.Professionals with special requirements for vision. Who are not suitable for surgery? 1.People whose myopia is growing too fast every year. 2.Severe dry eye disease. 3.Active eye disease, glaucoma, keratoconus (e.g. keratitis, intraocular degeneration). 4, Those whose eyelid abnormalities will affect corneal epithelial regeneration, such as impingement, eyelid entropion, eyelid ectropion, facial nerve palsy, etc. 5, corneal neovascularization into the laser cutting area. 6, cone cornea and other corneal protrusion diseases. 7, autoimmune and connective tissue disease history, severe scar body, pregnant women. 8.Severe amblyopia with very poor visual acuity with lens correction. 9.People who have high vision requirements and have big concerns about surgery. 10.People who have mental illness and are taking medication.