Publication: Functional visual tests to evaluate the effect of small astigmatism correction with toric contact lenses
Authors
Gil Fernández, Pedro ; Farcas, Alexandra ; Benito Galindo, Antonio ; Tabernero de Paz, Juan Francisco
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Publisher
Optica Publishing Group
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DOI
https://doi.org/10.1364/BOE.487410
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info:eu-repo/semantics/article
Description
© 2023 Optica Publishing Group. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This document is the Published version of a Published Work that appeared in final form in Biomedical Optics Express. To access the final edited and published work see https://doi.org/10.1364/BOE.487410
Abstract
The prescription of daily contact lenses does not often include a full astigmatic
correction. We question here whether this full astigmatic correction (for low to moderate
astigmatism) provides a substantial improvement in the overall visual performance compared to a
more conservative approach based only on the prescription of spherical contact lenses. The visual
performance of 56 contact lens neophytes divided in two contact lens fitting groups (toric versus
spherical lens fit) was assessed using standard visual acuity and contrast sensitivity tests. A new
set of functional tests simulating everyday tasks was also used. Results showed that subjects
with toric lenses had significantly better visual acuity and contrast sensitivity than those with
spherical lenses. Functional tests did not render significant differences between groups, which
was explained by several factors like i) the visual demand of the functional tests, ii) the dynamic
blur due to misalignments and iii) small misfits between the available and measured axis of the
astigmatic contact lens.
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Citation
Biomedical Optics Express, 2023, Vol. 14, Issue 6, pp. 2811-2820
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