Laser surgery is a corneal surgery, and there are certain requirements for the thickness of the cornea, and the thicker the cornea, the greater the decrease in myopia. General corneal lamellar surgery requires myopia of no more than 1200 degrees, including Smart surgery of no more than 1000 degrees, and corneal surface surgery requires myopia of no more than 800 degrees. After corneal cutting, the thickness of the remaining corneal central stromal bed is required to reach at least 250μm, and it is recommended to be safer at 280μm or more. For those who cannot meet the requirements of corneal laser surgery or who have thin corneas and high myopia, other surgical procedures can be considered, such as crystalline IOL implantation, which can sometimes correct 2,000-3,000 degrees and 500 degrees of astigmatism, and is a more suitable surgical option for people with high refractive error, but the disadvantage is that the price is currently more expensive.