Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses

Robert Edward AngDepartment of Cornea and Refractive Surgery, Asian Eye Institute, Makati City, PhilippinesPurpose: To compare the effect of induced astigmatic defocus on visual performance in pseudophakic eyes implanted with a small aperture, trifocal, or monofocal intraocular lens (IOL).Patients a...

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Autor principal:	Ang RE
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2019
Materias:	cataract refractive error small aperture IOL residual astigmatism Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/ce4a8042381244e1be8118b20828d3ee
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spelling	oai:doaj.org-article:ce4a8042381244e1be8118b20828d3ee2021-12-02T03:21:11ZComparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses1177-5483https://doaj.org/article/ce4a8042381244e1be8118b20828d3ee2019-05-01T00:00:00Zhttps://www.dovepress.com/comparison-of-tolerance-to-induced-astigmatism-in-pseudophakic-eyes-im-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Robert Edward AngDepartment of Cornea and Refractive Surgery, Asian Eye Institute, Makati City, PhilippinesPurpose: To compare the effect of induced astigmatic defocus on visual performance in pseudophakic eyes implanted with a small aperture, trifocal, or monofocal intraocular lens (IOL).Patients and methods: The study included 44 eyes with one of four types of IOL (IC-8 IOL (AcuFocus Inc., USA); FineVision (PhysIOL SA, Belgium); AT Lisa (Carl Zeiss AG, Germany); and enVista monofocal (Bausch & Lomb, USA). For astigmatic tolerance assessment, monocular distance visual acuity was measured with cylindrical lenses (power range=0.00–2.50 diopters (D) in 0.50 D increments) added to the subjects best-corrected distance manifest refraction. The assessment was repeated on three pre-determined axes (90°, 180°, and either 45° or 135°). The magnitude of astigmatic tolerance at each defocus step was assessed by taking the difference between logMAR visual acuity at the defocus step relative to that at 0.0 D (ie, no defocus condition).Results: Across all three axes, the reduction of mean monocular visual acuity at all defocus levels relative to no defocus was significantly smaller in IC-8 group compared to the other IOL groups. When the data was combined across all axes, the astigmatic tolerance of the IC-8 group was better than AT Lisa group from 0.50 D to 2.50 D and FineVision group from 0.50 D to 1.50 D (all P<0.05, ANOVA). The IC-8 group was better than the enVista group, but not significantly (P>0.05, ANOVA). Among individual orientations, statistically significant differences were seen between IC-8 IOLs and the other IOLs, with the largest difference being in the oblique axis. Astigmatic tolerance at all axes combined was 1.40 D for IC-8 IOL, 0.70 D for AT Lisa and FineVision, and 1.00 D for enVista IOLs.Conclusion: The small aperture IC-8 IOL showed greater tolerance to induced astigmatic defocus compared to trifocal and monofocal IOLs.Keywords: cataract, refractive error, small aperture IOL, residual astigmatismAng REDove Medical Pressarticlecataractrefractive errorsmall aperture IOLresidual astigmatismOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 13, Pp 905-911 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	cataract refractive error small aperture IOL residual astigmatism Ophthalmology RE1-994
spellingShingle	cataract refractive error small aperture IOL residual astigmatism Ophthalmology RE1-994 Ang RE Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
description	Robert Edward AngDepartment of Cornea and Refractive Surgery, Asian Eye Institute, Makati City, PhilippinesPurpose: To compare the effect of induced astigmatic defocus on visual performance in pseudophakic eyes implanted with a small aperture, trifocal, or monofocal intraocular lens (IOL).Patients and methods: The study included 44 eyes with one of four types of IOL (IC-8 IOL (AcuFocus Inc., USA); FineVision (PhysIOL SA, Belgium); AT Lisa (Carl Zeiss AG, Germany); and enVista monofocal (Bausch & Lomb, USA). For astigmatic tolerance assessment, monocular distance visual acuity was measured with cylindrical lenses (power range=0.00–2.50 diopters (D) in 0.50 D increments) added to the subjects best-corrected distance manifest refraction. The assessment was repeated on three pre-determined axes (90°, 180°, and either 45° or 135°). The magnitude of astigmatic tolerance at each defocus step was assessed by taking the difference between logMAR visual acuity at the defocus step relative to that at 0.0 D (ie, no defocus condition).Results: Across all three axes, the reduction of mean monocular visual acuity at all defocus levels relative to no defocus was significantly smaller in IC-8 group compared to the other IOL groups. When the data was combined across all axes, the astigmatic tolerance of the IC-8 group was better than AT Lisa group from 0.50 D to 2.50 D and FineVision group from 0.50 D to 1.50 D (all P<0.05, ANOVA). The IC-8 group was better than the enVista group, but not significantly (P>0.05, ANOVA). Among individual orientations, statistically significant differences were seen between IC-8 IOLs and the other IOLs, with the largest difference being in the oblique axis. Astigmatic tolerance at all axes combined was 1.40 D for IC-8 IOL, 0.70 D for AT Lisa and FineVision, and 1.00 D for enVista IOLs.Conclusion: The small aperture IC-8 IOL showed greater tolerance to induced astigmatic defocus compared to trifocal and monofocal IOLs.Keywords: cataract, refractive error, small aperture IOL, residual astigmatism
format	article
author	Ang RE
author_facet	Ang RE
author_sort	Ang RE
title	Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
title_short	Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
title_full	Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
title_fullStr	Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
title_full_unstemmed	Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
title_sort	comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses
publisher	Dove Medical Press
publishDate	2019
url	https://doaj.org/article/ce4a8042381244e1be8118b20828d3ee
work_keys_str_mv	AT angre comparisonoftolerancetoinducedastigmatisminpseudophakiceyesimplantedwithsmallaperturetrifocalormonofocalintraocularlenses
_version_	1718401822313414656

Comparison of tolerance to induced astigmatism in pseudophakic eyes implanted with small aperture, trifocal, or monofocal intraocular lenses

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