Excimer, semi-femtosecond, and full femtosecond surgery usually refer to the use of laser technology to achieve the effect of restoring the patient’s vision, but there are certain differences in the surgical methods, treatment effects, surgical equipment, and prices of the three laser technologies, and it is recommended that patients can choose a treatment method that is suitable for them according to their own situation and degree of myopia in order to achieve better results in restoring vision. 1. Surgical methods: Excimer laser technology refers to the use of The excimer laser is used to improve refractive error by refractive cutting of the stromal layer under the corneal flap, which usually requires the production of a corneal flap. While femtosecond laser technology usually does not require the production of a corneal flap, full femtosecond technology is used throughout the treatment process, while half femtosecond technology is usually used in the first half of the treatment with femtosecond technology, while the second half of the treatment with excimer technology; 2. Treatment effect: In general, full femtosecond technology has less impact on the cornea than the other two technologies, with better recovery and better results after surgery. And for most people, semi-femtosecond may have better results than excimer technology; 3. Surgical equipment: semi-femtosecond usually requires two machines using different lasers at the same time, and the treatment process requires the use of femtosecond laser equipment together with excimer laser equipment. Excimer requires the use of laminar knife and excimer laser equipment for surgery, while full femtosecond surgery usually requires only a femtosecond laser equipment, shorter and simpler process; 4, price: usually full femtosecond treatment is more expensive, followed by semi-femtosecond technology, excimer laser treatment is cheaper.