In 1949, foreign ophthalmologists began to carry out research on corneal refractive surgery for myopia. After a long period of groping, in 1983, excimer laser successfully cut the corneal tissue of animals, in 1988, PRK entered the clinical use of the human eye, and in 91 years, it was approved to promote, so that people saw the dawn of laser treatment of myopia. However, this technology inevitably brings negative impacts. PRK is a laser cutting of the anterior elastic layer of the cornea after removing the corneal epithelial layer. Because of the destruction of the corneal epithelium and the anterior elastic lamina, it leads to postoperative pain, photophobia, slower recovery of vision, and a significant proportion of regression and haze. Even the modified operation of PRK LASEK, EPI-LASIK is now only a small number of applications. Its defect is that it can only correct mild and moderate myopia, and it is not yet possible to cure high and ultra-high myopia. In 1995, LASIK (excimer laser in-situ keratomileusis) was approved by the FDA, which set off a boom in laser treatment for myopia, and with the development of laser equipment, excimer laser surgery has entered the maturity stage.LASIK is a corneal flap made by laminar knife, and laser cutting is carried out on the stroma layer of the cornea. Because the laser only works on the stroma, it is painless, quick to recover, and provides stable vision. It is possible to treat hyperopia and astigmatism simultaneously. The development of this technology has directly improved the treatment of myopia and has been widely used in just a few years. However, as a relatively mature technology, it still has the limitation of adapting to the target audience. Subsequently, the personalized cutting system introduced by excimer laser device vendors was recognized by clinical ophthalmologists, enabling personalized cutting of aberrations to achieve high visual quality. Individualized LASIK (Wavefront Guided Q Adjustment) is an optimization of the laser beam of conventional LASIK for the correction of low-order and high-order aberrations, which provides better postoperative visual quality than conventional LASIK for patients with high counts and high astigmatism. The major turnaround in laser treatment of myopia occurred at the World Ophthalmology Congress in Hong Kong in ’08. That meeting set a new standard for excimer laser surgery – femtosecond SBK, marking the perfect era of excimer laser correction.SBK is a type of LASIK that creates a corneal flap under the anterior elastic lamina. As the anterior third of the stroma is the strongest area of the cornea, compared with the flap making method of conventional LASIK surgery, this method better protects the integrity of the cornea, improves the visual quality and reduces the rate of dry eye, and the laser cutting site is closer to the eye surface, which is safer. OUP-SBK is to make ultra-thin corneal flap through the upgraded disposable tip (One Use-Plus) corneal laminar knife with pre-installed blades by Moria Company of France; femtosecond SBK, commonly known as femtosecond laser, is to make ultra-thin corneal flap through the laser knife. There are 3 steps in excimer laser myopia correction surgery: making the corneal flap, excimer laser cutting, and restoring the corneal flap. The femtosecond laser is only one method of making the corneal flap. Regarding the corneal flap, there is a recognized standard in ophthalmology: that is 90 microns thick to achieve SBK—— anterior elastic lamina inferior keratomileusis.SBK technology has the following advantages over the flap made by laser only: thinner, predictable, and flat corneal flap, faster visual recovery, smoother stroma, better patient comfort, and lower cost. Femtoseconds, on the other hand, have a wider use in a variety of surgeries such as corneal transplants. Say goodbye to myopia, choose the perfect SBK Excimer laser SBK is the crystallization of the collective wisdom of the international ophthalmology community, his maturity and perfection put an end to all the worries of myopic watchers, with more distinctive advantages. First, safer: SBK only treats 0.01mm at 0.1 place within the surface of the eye, which is closer to the surface of the eye than LASIK laser treatment, and has no effect on other tissues of the eyeball, thus improving the safety of the operation and ensuring “0” risk and no after-effects. Second, more stable vision after surgery: SBK treats the cornea under the anterior elastic layer located in the anterior third of the corneal stroma, which is the strongest area of the cornea, so it is not only unable to regenerate after the surgery but also not easy to be affected by external forces, which strengthens the stability of the cornea and ensures that there is no retrogression of the vision. Third, better visual quality and more comfortable: compared with the flap making method of LASIK surgery, SBK better protects the integrity of the cornea, so the eyeball recovers faster and feels more comfortable after the operation, and at the same time improves the visual quality and reduces the rate of dry eye. Now excimer laser has been popularized in more than 80 countries around the world, and only in China there are nearly one million myopic patients saying goodbye to glasses through it every year. The expert group of Hunan Provincial People’s Hospital Optometry Medical Center has started the promotion and application of LASIK since 1995, and formally introduced SBK from the beginning of the decade, and so far it has implemented SBK laser correction for more than one thousand myopia patients, and the satisfaction rate after the operation is as high as 99.9%. Since then SBK has made myopia surgery a perfect art.