The advantages of keratoplasty lenses are as follows: 1, few side effects: the physical damage to the eyes after wearing them is minimal; 2, reversible: they can effectively improve vision in the short term, and if you stop wearing them, your vision will gradually recover; 3, they can meet some special occupations: such as military personnel and civil servants’ medical examinations; 4, they are simple to operate and easy to use, and can be worn at night while sleeping. Keratomileusis is a treatment method between glasses and surgery, which gradually flattens the cornea by changing the central shape of the cornea and reversibly improves vision.