The word “all-femtosecond laser” and “femtosecond all-laser”, although they both have the word “all”, but the word “all” is placed in different positions. What are the differences? The difference is that the VisuMax all-femtosecond laser system (see the picture at the beginning of the article) is the only one in the world that can perform the all-femtosecond laser Smile surgery, and if the hospital you choose has the Zeiss brand of femtosecond laser, then you can definitely do the all-femtosecond laser Smile surgery. If there are only three other brands of femtosecond lasers, you cannot do the “all-flying” procedure. The so-called “full femtosecond laser surgery” refers to the treatment of myopia, the whole process of the application of femtosecond laser technology to complete the principle of light blasting. In the surgery, a specific diameter and curvature (curvature) interface is first cut in a relatively deep layer between the corneal layers, with the top of the arc facing the direction of the eye, and then a relatively shallow layer is cut in a slightly larger diameter than the previous layer, with a specific curvature (curvature) interface, with the top of the arc facing the direction of the corneal surface, and the two interfaces intersect at the periphery of the cornea, so that the two arcs in the middle of the cornea are The two interfaces intersect at the periphery of the cornea, so that the two curves in the middle of the cornea form a “convex lens” shaped thin layer of corneal tissue, and the “convex lens” tissue is removed with a special microscopic intraocular forceps to correct myopia. Therefore, full femtosecond laser surgery is also known as “full femtosecond laser corneal microlens removal”, and because the 2 mm incision for microlens removal is at 12 o’clock of the cornea, just like a small cherry mouth that is smiling at the surgeon, it is also known as “full femtosecond laser Smile (smile) surgery”. LASIK LASIK surgery, just use a different brand of femtosecond laser. The name is a good one, but it is also necessary to differentiate from other hospitals. The main differences between femtosecond LASIK surgery and full femtosecond laser surgery are: 1. The procedure requires a femtosecond laser and an excimer laser to work together; 2. A corneal flap needs to be created and lifted off during surgery; 3. The corneal incision is larger than for full femtosecond laser surgery. Note: The four brands of femtosecond lasers shown in the picture at the beginning of the article can all do this kind of femtosecond laser LASIK (femtosecond all-laser) surgery, but only the German Zeiss VISUMAX femtosecond laser can do both “all-femtosecond laser” surgery and “femtosecond laser LASIK “(femtosecond all-laser) surgery.