One-year follow-up of a multifocal intraocular lens with optimized elevated phase shift

Abstract

Purpose: To evaluate the standard outcomes of a multifocal intraocular lens (MIOL) with optimized elevated phase shift (EPS). Setting: (“Masked by journal requirement”) Design: Retrospective observational. Methods: 41 patients, consecutively operated on cataracts or refractive lens exchange with the implantation of the Liberty 640PM (EPS 2.0) and followed during 12-months, were included in the analysis. Retrieved variables were visual acuities at far, intermediate and near distances, defocus curves (VADC), and prediction error of four formulas optimized for IOL Master 500 and Pentacam AXL Wave. Patient reported outcomes were also obtained for assessing spectacle independence, satisfaction, bothersome to dysphotopsia, difficulties in daily life tasks and decision to be operated with the same MIOL. Results: Median monocular efficacy with best distance correction was 0, 0.1 and 0.1 logMAR at far, intermediate and near distances, respectively, with patients achieving binocularly a median of 0 logMAR at the three distances. VADC showed a depth of field of 3 D above 0.2 logMAR with a median increase of 0.07 logMAR from -1.5 D to -2.5 D. Complete spectacle independence was achieved at far distance whereas 97.6% and 85.4% was achieved at intermediate and near distances, respectively. 7.3% of patients were bothered by dysphotopsia and 92.6% of patients were likely to be operated again. Conclusions: EPS 2.0 restored patient’s vision in the full range of field with a nearly monotone decrease of visual performance from far to near, achieving high rates of spectacle independence at all distances and with low positive dysphotopsia rates (ClinicalTrials.gov Identifier: NCT05735990).