ArticleOptometry and vision science : official publication of the American Academy of Optometry2025
The effect of pupil size on visual performance with center-distance soft multifocal contact lenses.
Article in Optometry and vision science : official publication of the American Academy of Optometry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Visual Performance of Defocus Incorporated Multiple Segments With Triple Enhanced Design Spectacle Lenses Versus DIMS and Single Vision Lenses.Translational vision science & technology · 2026Trial
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3 authors.
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Abstract
significanceMultifocal contact lenses have been shown to slow myopia progression in children. Understanding their impact on visual performance is important. While these lenses have little effect on high-contrast visual acuity, they reduce low-contrast visual acuity and contrast sensitivity, with these reductions being greater as pupil size increases. PURPOSE: This study aimed to determine the effect of pupil size on visual performance with center-distance multifocal contact lenses used for myopia control.
methodsTwenty-four myopic, nonpresbyopic adults were fitted with a single vision (Biofinity) and a center-distance multifocal (Biofinity D +2.50 add) contact lens, in random order. The pupil was dilated, and visual acuity (high and low contrast) and contrast sensitivity were measured through a 3 and 6 mm aperture.
resultsVisual acuity differed by contrast level and depended on lens design and pupil size (p=0.0040). With both pupil sizes, high-contrast acuity with the multifocal lens was only two letters worse than with the single vision lens (p=0.0001). Lens design effects on low-contrast acuity were pupil size-dependent (p=0.0006). Compared with single vision lenses, low-contrast acuity with multifocal lenses was about three letters worse for a 3 mm pupil (mean ± standard error of the mean = 0.07 ± 0.02 logMAR, p=0.0010) and about two lines worse with a 6 mm pupil (0.19 ± 0.02 logMAR; p<0.001). While wearing the multifocal lens, low-contrast acuity decreased by nearly two lines when pupil size increased from 3 to 6 mm (0.17 ± 0.02 logMAR; p<0.0001). The effect of lens design on the area under the log contrast sensitivity function was pupil-size-dependent (p=0.024). When compared with a 3 mm pupil, the greatest reduction in area under the log contrast sensitivity function at the larger 6 mm pupil size was with the multifocal lens, causing a 17% decrease compared with a 9% decrease for the single vision lens (p<0.0001).
conclusionsMultifocal contact lenses perform similarly to single vision lenses under high-contrast and smaller pupil conditions; however, visual performance reductions increase with lower contrast and a larger pupil size.
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