It is generally accepted that laser refractive surgery can be performed in the range of 100-1200 degrees of myopia, 100-600 degrees of hyperopia, 600 degrees or less of astigmatism, and a stable refractive status within 2 years, i.e., within 1200 degrees of myopia. In addition, active eye diseases and serious systemic diseases, such as diabetes, systemic connective tissue diseases, and immunosuppressed patients should be excluded with caution. Those with high expectations of surgical results are also not suitable for surgery. Age requirements are 18 years or older, corneal thickness should be greater than 460 microns, and pupil diameter should not be too large.