Full femtosecond surgery is generally suitable for patients with a corneal thickness of 480um or more, but the exact suitability of the procedure is related to the patient’s condition. If the patient’s cornea is thin and the thickness of the cornea can only reach 400μm or even thinner, full femtosecond surgery is generally not recommended. This is because full femtosecond surgery requires a higher thickness of the cornea. Full femtosecond surgery corrects myopia by cutting corneal tissue, and if the patient is not thick enough, a conical cornea, or corneal bulge, can occur after surgery. In addition to the corneal thickness requirement, patients need to meet other criteria for full femtosecond surgery, such as stable myopia and elimination of ocular surface inflammation. It is recommended that patients who are considering full femtosecond surgery should visit a regular hospital, undergo an ophthalmologic examination, and choose an appropriate surgical procedure under the guidance of their doctor.