Vector analysis of astigmatic changes and optical quality outcomes after wavefront-guided laser in?situ keratomileusis using a high-resolution aberrometer

摘要

Purpose To assess the ocular optical quality results as well as the?astigmatic changes after wavefront-guided laser in?situ keratomileusis (LASIK) in eyes with myopic astigmatism. Setting Instituto Clínico-Quirúrgico Oftalmológico, Bilbao, Vizcaya, Spain. Design Prospective case series. Methods Thirty-three eyes having wavefront-guided LASIK with the Star S4IR excimer laser combined with the iDesign system were enrolled in the study. Changes in visual acuity, refraction, higher-order aberrations, and ocular scattering index (OSI) were evaluated during a 3-month follow-up. The Alpins method was used to analyze the astigmatic changes. Results A significant reduction was observed in refraction ( P ? P ? P ?≥?.551). Likewise, no significant changes were observed in OSI ( P ?=?.361), with a mean 90-day postoperative value of 0.66?±?0.58 (SD). A significant change to negative values of the magnitude of error ( P ?=?.007) and a significant decrease in the correction index ( P ?=?.004) were observed during the follow-up, with mean 90-day postoperative values of ?0.24?±?0.28 D and 0.86?±?0.17 D, respectively. Conclusion Wavefront-guided LASIK using a high-resolution aberrometer provided safe and efficacious correction of myopic astigmatism, with preservation of the ocular optical quality.