Abstract: A device that permits and facilitates implantation of an intracorneal ring for the correction of ametropias has two semicircular complementary strip-like cutting members, a support for maintaining the cutting members in fixed relationship, and a hand held operating member which is associated with the support and has a peripheral circular finger-engaging surface. In use, two small incisions are made in the cornea and a surgeon, holding the operating member, presses the cutting members against the cornea, directing the leading ends of the cutting members into the incisions. The device is rotated 180.degree. to create a 360.degree. tunnel in the cornea, and then it is reversed and removed. An intralamellar split ring is introduced into the tunnel. The ring is formed of silicon or the like; and, it has apertures to facilitate manipulation during the operation, a triangular cross section, and rounded ends.