It is true that not all people are suitable for myopic laser surgery, so those who are not can choose other correction methods. There are some considerations for corneal laser surgery. Patients with diseases, high expectations, too young, too high a degree, thin corneas, and too large pupil diameters are not suitable for surgery, as follows: 1. Diseases: Patients with active eye inflammation, systemic diseases, such as diabetic patients or patients with immune suppression. 2. High expectations: Some people with particularly high expectations for surgical results should be cautious Surgery. 3. Too young: Patients should not be too young, generally requiring an age of 18 years or older, as refractive error is basically stable above the age of 18. The refractive state of the last two years is required to generally change within 50 degrees per year, and there is no special occupational requirements need. 4, degree too high: the patient degree also has requirements, general lamellar surgery requires no more than 1200 degrees, of which SMILE surgery does not exceed 1000 degrees, superficial surgery does not exceed 800 degrees. 5, the cornea is thin: the patient corneal thickness also has certain requirements, after corneal laser surgery The thickness of the central stromal bed of the remaining cornea should be at least 250μm, it is recommended that 280μm or more, so that there is a limit to the degree of corneal refractive surgery correction, with the thickness of the cornea. 6, pupil diameter is too large: there may also be certain requirements for the diameter of the patient’s pupil, the pupil diameter in the dark room is generally more than 7mm patients to do a good job of preoperative education, there may be postoperative glare or night vision Impairment, to judge for themselves whether surgery is needed. As long as the indications are strictly grasped and the preoperative preparation and communication are done well, the postoperative results of corneal laser surgery are generally ideal and safe.