Yao Hui, CEO and director of refractive department of Landaier Eye Hospital, introduced the advantages of full femtosecond laser surgery, 1, minimally invasive valveless surgery with good curative effect; The incision of full femtosecond laser is only 2-4mm, which is 20% of that of semi-femtosecond. 2. The principle of lens extraction is more accurate. Full femtosecond passes through a small laser energy, is condensed by a highly optical system, and is supplemented by a high-speed emission frequency, so that a uniform and smooth matrix lens is made on the corneal stroma layer, and then is taken out through a micro-incision. 3. Corneal tissue is preserved to a certain extent, and the postoperative curative effect is more stable. Three-dimensional cutting can be accurate to micron level, which has little impact on the biomechanics of cornea. Avoid dry eye and corneal flap displacement, maintain the natural shape of corneal tissue to a certain extent, and the postoperative curative effect is more stable! 4. There is no need to complete the flap ablation operation in one step, and the intraoperative comfort is better. The whole femtosecond operation is completed by one device, and the whole operation takes only ten seconds, and the operation process is relaxed and comfortable!