Soft toric contact lens wear improves digital performance and vision—A randomised clinical trial


Purpose: To compare objective and subjective digital near visual performance and comfort in low to moderate astigmatic participants fitted with toric versus spherical equivalent silicone hydrogel daily disposable contact lenses. Methods: This was a double-masked, randomised, crossover study. Participants aged 18 to 39 years with astigmatism of −0.75 to −1.50 D were recruited and fitted with toric and spherical contact lenses, in random order. Outcomes were measured at baseline and after 1 week of wear with each contact lens type after the follow-up visits. High- and low-contrast near logMAR visual acuity, automated visual acuity, zoom (%), contrast (%), reading distance (cm), critical print size (logMAR) and reading speed were assessed. Participants also completed the validated Near Activity Visual Questionnaire (NAVQ) and Contact Lens Dry Eye Questionnaire 8 (CLDEQ-8) for each correction type. Results: Twenty-three participants completed the study (74% female, average age 24.4 ± 4.2 years). When participants wore toric contact lenses, near high- and low-contrast visual acuity and automated visual acuity improved by 3–4 letters (all p < 0.03) and participants were able to read faster on an iPad (p = 0.02). Participants were also able to read with 8% less contrast on the iPad with toric lenses (p = 0.01). Participants reported better subjective vision on the overall NAVQ (p = 0.001) and better comfort on the CLDEQ-8 (p = 0.02) with toric lenses. Fewer participants reported difficulty with maintaining focus at near, reading small print, reading labels/instructions, reading the computer display/keyboard and reading post/mail with toric correction. Conclusions: Toric contact lenses improve comfort, subjective and objective visual performance with digital devices and other near tasks compared with the spherical equivalent correction in participants with low to moderate astigmatism.

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Divisions: College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Optometry
Additional Information: © 2022 College of Optometrists. This is the peer reviewed version of the following article: Chao C, Skidmore K, Tomiyama ES, Wolffsohn JS, Richdale K. Soft toric contact lens wear improves digital performance and vision-A randomised clinical trial. Ophthalmic Physiol Opt. 2022 Sep 28., which has been published in final form at This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Uncontrolled Keywords: digital performance,silicone hydrogel,toric contact lenses,visual comfort,visual performance,Ophthalmology,Optometry,Sensory Systems
Publication ISSN: 1475-1313
Last Modified: 18 Jul 2024 07:15
Date Deposited: 11 Oct 2022 14:46
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Related URLs: https://onlinel ... .1111/opo.13053 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2023-01
Published Online Date: 2022-09-28
Accepted Date: 2022-08-22
Authors: Chao, Cecilia
Skidmore, Kelsea
Tomiyama, Erin S.
Wolffsohn, James S. (ORCID Profile 0000-0003-4673-8927)
Richdale, Kathryn

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