Analysis of the visual function with the continuous transitional focus intraocular lens Precizon Presbyopic

Abstract

Purpose: To evaluate the clinical outcomes of a refractive multi-segmented continuous transitional focus intraocular lens (IOL), analyzing the potential influence of patient pupil dynamics on these outcomes. Methods: Retrospective consecutive case series study enrolling 40 eyes (20 patients, 47–81 years) implanted with the Precizon Presbyopic IOL (Ophtec BV). The following clinical outcomes were analyzed during a mean follow-up of 12.1 months (2–24 months): visual acuity, refraction, contrast sensitivity (CS) under photopic and mesopic conditions, binocular defocus curve and evaluation of the perception of disturbing visual symptoms with a validated questionnaire. Results: Mean binocular uncorrected distance (UDVA), distance-corrected intermediate (DCIVA), uncorrected near (UNVA) and distance-corrected near visual acuities (DCNVA) were −0.09 ± 0.07, 0.04 ± 0.05, 0.17 ± 0.12, and 0.15 ± 0.10 logMAR, respectively. In the binocular defocus curve, mean distance-corrected visual acuity was over 0.20 logMAR for defocus levels from +1.50 to −3.00 D. No significant correlations of photopic pupil diameter with postoperative visual data were found (−0.165 ≤ r ≤ 0.192, p ≥ 0.235). Moderate correlations of mesopic pupil size were found with visual acuities for the defocus levels of −2.50 (r = 0.454, p = 0.003), −3.00 (r = 0.609, p < 0.001), −3.50 (r = 0.519, p < 0.001), and −4.00 D (r = 0.403, p = 0.010). Only significant differences were found between mesopic and photopic CS for 12 cycles/degree (p = 0.010). No cases of severe glare or halos were detected. In contrast, 10% of patients referred the severe perception of starbursts postoperatively. Full spectacle independence was referred by almost all patients (90%). Conclusions: The IOL demonstrates effective visual restoration at various distances, characterized by high levels of visual quality and minimal dependence on pupil dynamics.