Abstract
Purpose :
To explore how complex scenes where objects are located at multiple object vergences will influence the final visual perception of subjects.
Methods :
Biofinity Monofocal, Biofinity Multifocal 1.5 “D” and 2.5 “D” sagittal power profiles were obtained with a NIMO instrument. Corresponding Visual Strehls in the Frequency Domain (VSOTF) values were calculated for 2- and 6-mm pupil sizes by using customized pupil segmentation algorithms (MATLAB). Visual Acuities (VA) were measured in five subjects (accommodation paralyzed, tropicamide 1%) for multiple object vergences (-4 D to 4 D in 0.25 D increments) and pupil sizes (2 mm and 6 mm). Subjects wore the same version of the lens in both dominant and non-dominant eyes. Measurements were randomized between subjects to prevent learning/fatigue effects.
Results :
For a 2 mm pupil size, monofocal lenses provide 51.21% of visual acuities (VAs) behind the retina, and 48.79% in front the retina. +1.5 “D” lenses provide 43.29% of VAs behind the retina and 56.71% in front. +2.5 “D” lenses provide 40.73% of VAs behind the retina and 59.27% in front. For the 6 mm pupil size, monofocal lenses provide 51.29% of VAs behind the retina and 48.71% in front. +1.5 “D” lenses provide 43.71% behind the retina and 56.29% in front. +2.5 “D” lenses provide 39.19% of VAs behind the retina and 60.81% in front.
Conclusions :
We have shown that optical quality calculated through the area under the VSOTF through focus is a good predictor for the visual acuities available in front and behind the retina. With the 2mm pupil size, there is an 86.46% correlation between the VSOTF and the visual acuities. With the 6mm pupil size, there is a 63.77% correlation between the VSOTF and the visual acuities. Multi-vergence scenes allow the eye to explore a range of VA available in front and behind the retina. Therefore, exposure to multi-vergence scenes (i.e., outdoor time) should increase the effectiveness of MCLs when used for myopia control.
This abstract was presented at the 2024 ARVO Annual Meeting, held in Seattle, WA, May 5-9, 2024.