Factors that affect distance-corrected near visual acuity in partial range of focus intraocular lenses

Partial range of focus (ROF) intraocular lenses (IOL) offer excellent distance and intermediate visual acuity, but usually limited distance-corrected near visual acuity (DCNVA). We evaluated the characteristics of eyes implanted with two specific ROF IOL and very good DCNVA. We conducted a prospective, observational, cross-sectional study. Patients implanted with a ROF IOL were visited 1-3 months after uneventful phacoemulsification. We determined mono/binocular, corrected/uncorrected visual acuities (VA) at far, intermediate and near distance; photopic pupil diameter, corneal asphericity, aberrations (RMS_HOA, Z_{4- 0}), and axial length (Pentacam^® AXL Wave; Oculus, Germany); and implanted IOL power. Monocular DCNVA was stratified in tertiles, with eyes in the first (better DCNVA) compared to the others (standard DCNVA). Univariate and multivariate generalized estimating equations models were used to compare the features of both groups. One-hundred eyes from 50 patients (mean age 69.0 years [SD 8.7], 66.0% female) were enrolled. Monocular distance logMAR VA was 0.00 (0.04) and DCNVA was 0.37 (0.15). Only younger age (66.4 vs. 71.0 years), smaller pupil (2.81 vs. 3.04 mm), and better distance VA (0.00 vs. 0.02 logMAR) were associated with better DCNVA. Therefore, a better distance-corrected VA, smaller photopic pupil diameter and younger age favored better DCNVA with the tested ROF IOL.