Comparison of ocular aberrations and retinal image quality provided by a validated aberrometer and a new open field aberrometer for VEMoS project

Abstract

AbstractPurpose: The aim of this observational study was to compare the retinal image quality and ocular aberrations provided by a validated aberrometer and by a new open field aberrometer.Methods: This is an observational and comparative study composed by healthy eyes not presenting cataract or ocular pathologies affecting media transparence or visual function. Patients underwent a measurement of ocular aberrations by a closed field aberrometer (Osiris, CSO) and by an open field aberrometer developed for VEMoS European project (OFA, CSO). Both measurements were performed by a qualified optometrist and the pupil size selected for the analysis was 4 mm. SPSS program was applied for the statistical analysis, particularly Wilcoxon test was used to compare both devices considering a significance of 0.05.Results: The study included 20 eyes of 20 patients with a mean age of 36.2 ± 9.7 years. The sphere was significantly more negative with Osiris in comparison with OFA (−0.33 ± 2.17 diopters vs. 0.29 ± 2.17 diopters, p < 0.001), the spherical aberration was also slightly lower with Osiris (0.02 ± 0.03 microns vs. 0.03 ± 0.03 microns, p: 0.045). The rest of aberrometric coefficients including the cylinder, coma, trefoil, quadrefoil and secondary astigmatism showed no significant differences between devices (p > 0.05). Moreover, the point spread function did not presented statistical differences, but a trend to obtain higher values was observed in Osiris (0.219 ± 0.127 vs. 0.189 ± 0.126, p: 0.370).Conclusions: The sphere provided by an open field aberrometer was significantly more positive comparing with a close field aberrometer probably associated to an accommodative response induced in close field aberrometers. Similarly, the spherical aberration assumed small changes between devices, which would be generated also by accommodation. The rest of parameters showed no differences between devices indicating a suitable agreement between devices for these coefficients.