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.