Patients with myopia, hyperopia, astigmatism and other refractive errors are not all suitable for LASIK surgery. Only patients with the following three conditions are suitable for LASIK treatment: 1. 18 years of age or older; 2. relatively stable refractive status (no significant change in prescription) in the past two years; 3. no contraindications to LASIK such as active inflammation of the eye, such as acute conjunctivitis, keratitis, etc.; patients with cone cornea, glaucoma, severe dry eye, etc.; patients with severe amblyopia with very poor corrected visual acuity; patients with scarring, diabetes, collagen diseases; proptosis, incomplete eyelid closure; patients with one eye, etc.