Dr.Payal Deepak Pandit

Dr. ROHIT SHETTY, Dr.Pooja Khamar

Abstract

Purpose: To compare outcomes of a novel tissue-sparing Topo-guided removal of epithelium in keratoconus(TREK) & cross-linking (CXL) vs. simultaneous topo-guided photorefractive keratectomy (T-PRK) & CXL in keratoconus

Methods: Outcomes of 100 TREK &112 T-PRK eyes operated on Schwind Amaris were compared 1 year post operatively. In TREK, a customized decentered, elliptical ablation was performed, followed by CXL. In T-PRK, PRK using modified refraction keeping maximum stromal ablation to <40μm, followed byCXL Results: In TREK, Kmax(maximum keratometry) reduced by 3.62 +/- 0.9D, vertical coma by 0.56 +/- 0.3μm and RMS of higher order aberration (HORMS) by -0.66 +/-0.36μm (P<0.05). In T-PRK eyes, Kmax, vertical coma &HORMS reduced by 4.60 +/- 0.51D, 0.79 +/- 0.18μm &-0.80+/-0.9μm(P<0.5). Conclusion: Both T-PRK &TREK significantly reduced Kmax, HORMS & vertical coma. Thus in steeper & thinner corneas unsuitable for T-PRK, TREK could be a viable alternative.