The Intrastromal Corneal Ring: Two Cases in Rabbits

ABSTRACT: The intrastromal corneal ring (ICR) is a refractive device with the potential to correct both myopia and hyperopia. The ring is inserted in the peripheral corneal stroma at about two-thirds depth. Mechanical expansion of the ring flattens the central cornea, while constriction of the ring steepens it. Two rabbits underwent ICR surgery. The rabbit with ring expansion showed central corneal flattening 6 months postoperatively. The rabbit with ring constriction showed central corneal steepening 6 months postoperatively. In both cases, the central cornea remained clear.