Analysis of I-Trace high-order aberrations induced by wavefront-optimized ablation profiles

Abstract

Aim This work aimed to analyze the ocular aberrations induced by wavefront-optimized (WFO) ablation profiles using I-Trace aberrometer (ray tracing). Settings and design This is a prospective noncomparative nonrandomized clinical study that was carried out at Rooya Eye Center, Alexandria, Egypt. Patients and methods The study included 20 eyes of 10 cases that underwent laser in situ keratomileusis with WFO ablation profile. Cases were followed up at 1 and 3 months after surgery to analyze the ocular aberrations done using I-Trace Visual Functional Analyzer (ray tracing technology). Results The mean preoperative total high-order aberration was changed from 0.33±0.2 to 0.38±0.21 after 1 month (P=0.107) and became 0.35±0.15 at 3 months (P=0.265), which was statistically insignificant, with an increase of 6.074%. The mean preoperative coma was 0.27±0.17 and changed to 0.29±0.2 after 1 month (P=0.345) and became 0.32±0.22 at 3 months (P=0.107), which was statistically insignificant, with an increase of 17.6%. The mean increase in spherical aberrations was from 0.086±0.06 preoperatively to 0.18±0.15 after 1 month (P=0.018) and to 0.19±0.24 at 3 months (P=0.036), which was statistically significant, with an increase of 119.4%. The secondary astigmatism mean preoperative value was 0.06095±0.0439 and increased to 0.0787±0.0535 after 1 month (P=0.103) and became 0.1059±0.0592 at 3 months (P=0.098), which was statistically insignificant, with an increase of 73.7%. The trefoil preoperative mean was 0.18±0.13 and changed to 0.16±0.09 after 1 month (P=0.125) and became 0.15±0.07 at 3 months (P=0.251), which was statistically insignificant, with a decrease of −13.7%. Conclusion There was no significant total high-order aberrations increase after WFO ablation profile for low to moderate myopia.