Abstract
Purpose :
To investigate adaptation and factors associated with vision satisfaction and willingness to wear (WTW) Miyosmart spectacles.
Methods :
Twenty-five myopes aged 18-35 years were recruited. In phase 1, subjects wore single vision (SV) and Miyosmart spectacles bilaterally for 1 hour each. Objective variables assessed were; visual acuity (VA) and contrast sensitivity (CS), in high (HI) and low illumination (LI) on and off-visual axis. Subjective variables included; dynamic vision disruption rating (DVDR), vision ratings (VR) for clarity, ghosting, haloes (on and off-axis), overall visual comfort and VR in various scenarios including; reading, screen use, walking, moving eyes/head and overall vision satisfaction (OVS) (1-10 scale). WTW was indicated as yes/no. Multivariate analysis considered all variables using generalised estimating equations for OVS. Odds ratios (OR) determined variables associated with WTW. In phase 2, subjects wore Miyosmart for 2 days and all subjective VR were given before and after wear. Paired t-tests were used to assess changes.
Results :
Phase 1 was completed by 24 subject and phase 2, 21. At a univariate level, all variables other than on-axis VA (high and low contrast in HI and LI) and on-axis CS were significantly correlated with OVS and WTW (all p<0.05). WTW was 83% in SV and 8% in Miyosmart. Multivariate analysis indicated higher OVS was associated with higher scores in VR for moving eyes/head (r=0.88), reading (r=0.83), overall visual comfort (r=0.78) and CS off-axis (r=0.63), with a model r2=0.85 (all p£0.01). WTW was associated with higher OVS (OR=3.4), lower DVDR (OR=0.59) and near ghosting (OR=0.1) (all p=0.01). After 2 days of wear, there were significant improvements in VR for distance (0.76±1.45), distance off to side (1.38±2.13), when walking (1.33±2.33), moving eyes/head (1.38±2.27), reading (1.19±2.44), screen use (1.62±3.28), and OVS (1.81±2.04). There was also a significant reduction in ghosting on screens (1.62±1.46) and reading (1.43±3.04) (all p<0.05). WTW increased to 38%.
Conclusions :
Subjective evaluation of visual tasks that depend on peripheral and dynamic vision have a higher correlation with wearability for the Miyosmart lens in an adult population, with significant adaptation occurring after only 2 days. These findings may assist in evaluating the performance of, as well as predicting adaptation in such lens designs.
This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.