A corneal thickness greater than 410μm after myopic surgery is considered safe. The normal human cornea thickness is about 550 μm, and it is safe for people to have no less than 400 μm of remaining corneal thickness after myopic surgery. Anything less than 400 μm may have other adverse effects on the shape of the cornea, as well as the rest of the eye. If the myopia is high and the corneal thickness is thin, it may easily lead to a thin central corneal thickness after the surgery. It is recommended that people go to a professional eye hospital for a corneal thickness check before undergoing the surgery so that it will be safer. After myopia surgery, people should consult the doctor to know their corneal thickness accurately, and seek medical treatment in time if there are other eye discomfort problems.