As we all know, both full femtosecond and semi-femtosecond are laser myopia surgery, many people ask: What is the difference between full femtosecond surgery and semi-femtosecond surgery? What is full femtosecond? Full femtosecond surgery is a surgical procedure that requires only one device, the femtosecond laser. The incision is small, about 2 to 4 mm, and the surgery takes six to seven minutes. Laser surgery has its own advantages and disadvantages, and the exact type of surgery is subject to detailed examination by the surgeon and specific analysis. Full femtosecond is generally suitable for patients with myopia up to 800 degrees and astigmatism up to 200 degrees. What is hemifemtosecond? Semi-femtosecond surgery is a procedure that involves creating a flap with a femtosecond laser, lifting it off, and then cutting it with an excimer laser in the stroma of the cornea before closing it. The surgical incision is large, about 20mm, and the operation takes about 10 minutes. The post-operative vision recovery is fast and the visual quality is high, and a good corrected vision can be achieved 24 hours after surgery. Through the above introduction you should be able to see: full femtosecond, half femtosecond incision size is different, the operation time is different, the operation requirements are different, suitable for different people. If you want to know which type of surgery to do, you should go through a strict pre-operative examination and follow the doctor’s advice to choose the right type of surgery for you according to the examination results. If the examination results are that your eyes are eligible for various myopia surgeries, then you can choose according to your doctor’s recommendations and your own wishes.