The implantation of intracorneal ring segments is an outpatient procedure performed in two steps, using topical anesthetic eye drops. In the first step, using two semicircular dissectors, a radial incision is made in the peripheral cornea, through which two concentric semi-circular tunnels are created in the cornea. Then in the second step, the ring segments with the calculated thickness are implanted in these tunnels. After surgery a bandage contact lens was placed on the cornea. Also postoperative antibiotic and steroid eye drops will be prescribed for one to several weeks.