Interpretation of Aberrometry Measurements in Cataract Surgery

Abstract

PURPOSE: To discuss the use of wavefront measurements generated from the NIDEK OPD-Scan II and OPD-Station for cataract surgery. METHODS: Case examples are presented along with information and relevant clinical data obtained from the OPD-Scan II aberrometer and OPD-Station software. All eyes underwent corneal topography, wavefront aberrometry, autorefraction, keratometry, and pupillometry measurements pre- and postoperatively using the OPD-Scan II. Optical and visual quality simulations, including modulation transfer functions, and visual quality attributable to corneal and internal aberrations, were performed using OPD-Station software. RESULTS: Twelve case examples from cataract surgery, including aspheric intraocular lens (IOL) implantation, diffractive IOLs, and toric IOL implantation, are presented. CONCLUSIONS: The wavefront analysis in cataract surgery was shown to be a fundamental tool in evaluating visual quality after IOL implantation. The OPD-Scan II distinguished between corneal and lenticular aberrations, allowing for evaluation of actual optical and visual performance attributable to the IOL. Our review of case examples also showed that for multifocal IOL implantation, a thorough investigation is necessary to correlate subjective and objective visual quality and for patient selection.