Clinical validation of single-vision lenses optimized by considering user’s accommodation

Abstract

Purpose : The optimization of customized spectacle lenses often considers individual user parameters such as morphological data, frame parameters, and working distances to compensate oblique aberrations. Recently, it has been proposed a new optimization method that considers the accommodative ability of the user to optimize the lens in a more realistic object space and to modulate the oblique aberrations of the user in a more efficient way. The goal of this study is to compare the performance of single vision lenses (SV) optimized with this method against standard spherotorical lenses.

Methods : Double-blind study in which 66 non-presbyopic users were evaluated when wearing a spherotorical SV lens (control) and a customized SV lens optimized with a new method considering user accommodative ability (DRP2). Accommodative lag (LAG) was measured on-axis and 20 degrees off-axis using near retinoscopy at 40cm with a near fixation card attached to the retinoscope. Static visual acuity (VA) was measured on-axis and 20 degrees off-axis at 5.25m. Dynamic visual acuity (DVA) was measured using the software COI-Sport with a speed of 100cm/s at 5.25m. User experience (UX) was evaluated with a satisfaction survey after subjects used both pairs of lenses for 7 days each. Satisfaction rates in scale 1-5 and preferred lens choice were analyzed. Statgraphics Centurion XVI.II software was used to determine differences between lens designs.

Results : Significant higher dynamic VA and UX were found, showing better values for the lens DRP2. Non-significant differences were found in the LAG and static VA between both lenses at any of the viewing positions (Table 1). When the participants were asked to select their preferred lens, 51% preferred the DRP2 lens, 27% selected the control lens and 22% of the participants did not perceive differences between them.

Conclusions : Single-vision lenses optimized with a new optimization method that considers user accommodative ability provide better dynamic visual acuity and user experience than spherotorical lenses. Nevertheless, the accommodation lag of the user remains stable on and off-axis.

This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.