ARTICLESRK4 (Reverse-Geometry) Contact Lens Fitting after Penetrating KeratoplastyLin, Jen-Chieh M.D.; Cohen, Elisabeth J. M.D.; Rapuano, Christopher J. M.D.; Laibson, Peter R. M.D.Author Information From the Cornea Service, Wills Eye Hospital, and the Department of Ophthalmology, Jefferson Medical College, Thomas Jefferson University, Philadelphia, PA. Accepted September 20, 2002. Address correspondence and reprint requests to: Elisabeth J. Cohen, M.D., Cornea Service, Wills Eye Hospital, 840 Walnut Street, Suite 920, Philadelphia, PA 19107. Phone: (215) 928-3180; fax: (215) 928-3854; e-mail: [email protected] Eye & Contact Lens: Science & Clinical Practice: January 2003 - Volume 29 - Issue 1 - p 44-47 Buy Abstract Purpose. We evaluated the performance of the RK4 (reverse-geometry) contact lens in patients with flat central and steep peripheral corneal topography after penetrating keratoplasty (PK). Methods. A retrospective study was performed of post-PK patients fitted with RK4 lenses on the Cornea Service at Wills Eye Hospital, between March 2000 and February 2002. Results Fifteen eyes of 13 post-PK patients were fitted with RK4 lenses and monitored for more than two months (range, 2.1–23.5 months; mean, 8.1 ± 7.0 months). The average number of lens refits per eye was 1.0 ± 1.2 (range, 0–4). Ninety-three percent (14/15) of the eyes that were fitted achieved at least 20/30 visual acuity, and 53% (8/15) of eyes achieved 20/20 visual acuity. A comparison of prefitted and post-fitted corrected visual acuity demonstrated a statistically significant improvement (P <0.01). RK4 lenses were successfully worn full time or part time in all cases. Conclusions. The RK4 lens can provide well-tolerated visual correction in cases with central flat, peripheral steep corneal contour following PK. © 2003 Lippincott Williams & Wilkins, Inc.