Well, generally speaking, prk surgery is well known for its good function for many people. First, you need to know that prk surgery is a kind of eye surgery which is to correct nearsightedness, farsightedness, and astigmatism by removing surface cells of the cornea. In the surgery, it will just remove some surface cells within the cornea without blades so, for many people, after the surgery, it will be free to see without glasses or contacts. But on the other hand, after the surgery, you need to pay more attention to some risks such as infection, bleeding, for the eyes after surgery are very sensitive and fragile. So just be careful about it.