All patients who are suitable for traditional general laser surgery can undergo this procedure. In the past, there were five categories of people who could not undergo traditional general laser surgery can also choose femtosecond laser surgery, which allows more patients to get better vision in a safer situation. The main categories are as follows: 1. 10% of patients who cannot undergo traditional Lasik surgery due to thin corneas and high myopia can undergo Lasik surgery with femtosecond laser flap making. 2, due to the small eye fissure, small corneal diameter, flat corneal people, and can not use the traditional mechanical knife to make the corneal flap can also do femtosecond laser. 3.Patients who need secondary augmentation surgery. 4, For patients who are afraid of cutting the cornea with a mechanical metal corneal lamellar knife. 5.Patients who have high requirements for surgical results, especially night vision.