Wavefront-Guided Photorefractive Keratectomy for Correction of Residual Refractive Error after Intacs Implantation in Patients with Keratoconus

Purpose: To evaluate the efficacy of Wavefront-guided photore-fractive keratectomy (PRK) for correction of residual refractive error after intrastromal corneal ring segments (ICRS) insertion for treatment of keratoconus. Patients and Methods: In this prospective study five eyes of 5 ker-atoconus patients who had previous ICRS implantation (four Intacs TM and one Keraring), underwent Wavefront-guided PRK to cor-rect residual refractive error. Results: Three months postoperatively, the mean spherical equivalent (SE) improved from 2.07 ± 1.38 Diopter to - 0.87 ± 0.54 Diopter. Four out of 5 eyes were within ± 1.00 Diopter of Plano refraction. Three eyes had UCVA of 20/30 or better (all eyes; 20/40 or better). After 6 months, the mean SE was - 0.75 ± 0.50 Diopter and all eyes were within ± 1.00 Diopter of Plano refraction. UCVA was 20/20 in 2 eyes, 20/30 or better in 2 eyes and 20/40 in one eye. One patient lost one line of BCVA. Conclusion: This study series showed that wavefront-guided PRK might be an effective procedure for correction of residual refractive error after ICRS insertion in keratoconus patients. Improvement in UCVA was seen in all cases after PRK without any complications and haze.