The quality of corneal flap production in corneal laser surgery directly affects the quality of surgery. Thinner, more uniform flaps and fewer flap complications are the goals we pursue. The arrival of the femtosecond laser has brought us a better solution. 1. Higher precision Femtosecond flap making is strictly controlled by computer throughout the entire process, and its accuracy reaches the micron level, producing a more uniform and flat corneal flap, laying a good foundation for subsequent excimer laser surgery. At the same time, the higher precision also brings less nerve and blood vessel damage, effectively reducing the incidence of postoperative dry eye. 2, higher safety The femtosecond laser only produces some water and bubbles to push away the corneal tissue during flap making, no damage to the tissue, and if abnormalities occur during surgery, secondary surgery can be performed directly. Its unique flap fitting pattern solves the problem of flap repositioning misalignment, and also makes the repositioned flap fit tighter, reducing the risk of flap displacement after surgery. The unique flap molds for each eye of each patient during the femtosecond laser flap making process eliminates cross-infection during the surgery and avoids medical infection, bringing the safety of the surgery to a higher level. The Femtosecond laser provides a personalized flap making mode, which allows patients to choose different flap thickness, size, and side cutting angle according to their own conditions, providing the possibility of surgery for patients who cannot undergo traditional LASIK surgery. 4, better visual quality The femtosecond laser produces a more uniform and perfect corneal flap, effectively avoiding the possible aberrations of traditional flap making, which greatly improves the visual quality of patients after surgery. The FS200 femtosecond device is the fastest femtosecond laser in the world, and the flap making time is shorter than other femtosecond lasers, so there is no need to wait after flap making, which reduces the operation time and makes the operation complete in one go. The error range is also reduced from 10 microns to 5 microns for higher accuracy. The elliptical flap option is also available for patients with long-term contact lens wear and corneal neovascularization, which better solves the problem of corneal flap bleeding, all of which will guarantee good visual quality after surgery.