At present, China’s corneal refractive surgery is in a steady development stage, the introduction of femtosecond laser will make corneal surgery into a new era. Many myopic patients want to understand the differences between the traditional LASIK series and femtosecond laser flap LASIK surgery, let’s introduce: the principle of traditional LASIK excimer laser myopia surgery: the surgery uses a corneal lamellar knife to create a corneal flap in the corneal stroma, and then uses an excimer laser to cut in the corneal stroma surface to change the corneal curvature to correct myopia, and then The flap is then reset. Femtosecond laser flap LASIK surgery is a procedure that uses a femtosecond laser instead of a corneal lamellar knife to create a flap in the corneal stroma, and then uses an excimer laser to cut in the corneal stroma to change the curvature of the cornea to correct myopia, and then resets the flap. We also call this all-laser surgery. The difference lies in the method of making the flap during surgery. So what are the advantages of femtosecond laser flap LASIK over traditional LASIK surgery? Femtosecond laser LASIK surgery advantages: 1. Femtosecond laser flap making is safer. Due to the use of fully computer-controlled parameters, laser separation tissue flap, and there is pressure-sensing safety automatic protection device, femtosecond laser safety greatly exceeds the corneal lamellar knife. Femtosecond laser flap thickness has high uniformity, accuracy and repeatability. The thickness of the flap made by the femtosecond laser is the same everywhere, and the actual thickness of the flap is very close to our pre-designed one, with very small fluctuations and good repeatability. Femtosecond laser allows the surgeon to completely personalize the design of various corneal flap parameters, including flap thickness, diameter, flap shape, flap tip position and width, etc., truly realizing “personalized surgery”. 4. Femtosecond laser flap making is less likely to cause damage to the corneal epithelium. 5, femtosecond laser flap making can reduce the occurrence of dry eye symptoms after surgery. 6. The possibility of infection is greatly reduced because the whole process is blade-free.