One hundred percent of the patients treated to date have met the FDA criteria for stability. Sunrise Technologies has recently received FDA clearance to treat both eyes on the same day. Sunrise has also begun a study of hyperopia treatment of up to 4 diopters as well as patients who are overcorrected from myopic PRK procedures. RFK is an investigational procedure. This procedure creates a central steepening of the cornea by making six incisions in a circumferential pattern.
Current techniques avoid connecting the six incisions.
HK results have been very inconsistent and the procedure has been abandoned in the United States. This term was first applied to Barraquer's cryolathe techniques used back in the 1960's. Since then, it has become more of a generic term to indicate all of the lamellar refractive corneal surgical procedures that remove a portion of the patient's corneal stroma to correct for refractive error. The incisions heal faster and optical quality of the cornea is preserved by making incisions at the limbus. The procedure is more forgiving and easy to incor porate with cataract extraction.