The application of conductive keratoplasty for the shrinkage of the human cornea
Abstract
The surgical correction of hyperopia and hyperopic astigmatism has always been a challenge for refractive surgeons. The efficacy, quality of vision and most im-portantly safety, provided by the existing laser surgical techniques are often not satis-factory. On the other hand, thermokeratoplasty procedures are minimally invasive, do not require corneal tissue removal, and operate outside the central clear zone of the cornea. The goal of conductive keratoplasty, which is a thermokeratoplasty technique, is to produce structural changes in the three-dimensional grating of collagen in the stroma of the cornea. These changes are achieved through the elevation of the tissue temperature. The increased tissue temperature is induced by electric impedance in the flow of energy through the collagen fibrils. Controlled-release radiofrequency energy (350 KHz) is delivered to the depth of 500 μm with the help of a Keratoplast tip ViewPoint™ CK (Refractec, Inc., Irvine, CA, USA). With the increase of ...
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