Myopia can be corrected by either full femtosecond surgery or half-femtosecond surgery, but there is no absolute superiority or inferiority between the two. The indications for the two types of surgery differ to some extent, which are mainly related to the patient’s degree of myopia and the thickness of the cornea. 1. Myopia: Myopia patients with myopia of 1200 degrees or less or astigmatism of 600 degrees or less are more suitable for semi-femtosecond surgery, while myopia patients with myopia of 1000 degrees or less or astigmatism of 500 degrees or less are more suitable for full femtosecond surgery. 2. Corneal Thickness: Semi-femtosecond surgery requires the production of a corneal flap, which requires high corneal thickness, so only patients with high corneal thickness can undergo this surgery, while full-femtosecond surgery does not require the production of a corneal flap, so the damage to the cornea is relatively small, so if the patient’s corneal thickness is not suitable for semi-femtosecond surgery, they can consider this surgery. In addition, compared with half-femtosecond surgery, full-femtosecond surgery patients have less trauma and less pain, so full-femtosecond surgery will be safer if the above conditions are met. It is recommended that myopic patients seek timely medical attention to assess their condition and follow the doctor’s instructions to choose the appropriate treatment.