The difference between “all-femtosecond laser” and “femtosecond all-laser” is obvious, although both have the word “all”, but the word “all” is placed in different positions. The difference is still very obvious. The only one in the world that can perform all-femtosecond laser Smile surgery is the VisuMax all-femtosecond laser system produced by Zeiss, Germany, and patients can do all-femtosecond laser Smile surgery if they choose a hospital that has the Zeiss brand of femtosecond laser. The full femtosecond technology is commonly known as an accurately positioned laser knife, which sets the thickness of the cut cornea according to the patient’s myopia, and then uses the laser to cut a convex lens shape through the surface layer of the cornea, and then makes a small incision of 2mm or less above the cornea, through which the laser engraved corneal lens piece is removed to achieve the purpose of treating myopia. In addition to the small incision, full femtosecond does not use excimer laser cautery, and reduces intraoperative and postoperative discomfort. That’s why the use of full femtosecond is gaining more and more acceptance. It is also known as “Full Femtosecond Laser Smile Surgery” because it is like a small cherry mouth that is smiling at the surgeon. The whole procedure can be done with a single femtosecond laser device. 2, the whole procedure is femtosecond and silent, without the involvement of excimer laser, so there is no sound of pulses when the excimer laser scans the cornea, and no “smell” when the excimer laser ablates the cornea. 3, no need to make “4. The incision in the cornea is smaller and more minimally invasive. FireEye 2: The so-called “femtosecond all-laser” is a “rubric” for hospitals that perform this procedure, and there is no such clinical term. The standard name in textbooks and academic journals is “femtosecond laser LASIK surgery”. It means that during the LASIK procedure, the femtosecond laser completes the first step of the procedure —- to create the corneal flap, and then the excimer laser completes the second step of the procedure —- to ablate part of the thickness of the corneal stroma. Because half of the procedure is done by the femtosecond laser and the other half is done by the excimer laser, it is also known as “hemifemtosecond laser surgery.” The main differences between femtosecond LASIK surgery and all-femtosecond laser surgery are: 1) a femtosecond laser and an excimer laser are required to perform the surgery together; 2) a corneal flap needs to be created and lifted off during the surgery; 3) a larger corneal incision than with all-femtosecond laser surgery; Many femtosecond lasers can perform this type of femtosecond LASIK (femtosecond all-laser) surgery, but only the German Zeiss The VisuMax femtosecond laser can do both “full femtosecond laser” surgery and “semi-femtosecond” (femtosecond full laser) surgery. The reason why some hospitals use “femtosecond all-laser” surgery to confuse “all-femtosecond laser” surgery, mainly because the purchase cost of the German Zeiss femtosecond laser and the cost of consumables for each surgery is too high, the high cost is bound to bring about an increase in surgical pricing, but in four weeks The high cost inevitably leads to higher surgical pricing, but in a circle surrounded by low-cost myopia surgery, it is necessary to take certain risks. In the end, the concept of “femtosecond all-laser” is an unconfident call for “semi-femtosecond laser surgery”.