Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample

Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample

Amr A Gab-Alla Ophthalmology Department, Faculty of Medicine, Suez Canal University, Ismailia, EgyptCorrespondence: Amr A Gab-AllaOphthalmology Department, Faculty of Medicine, Suez Canal University, Ring Road, Ismailia, EgyptTel +20 1222836261Email amrophth@hotmail.comAim: To evaluate the contribut...

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Autor principal: Gab-Alla AA
Formato: article
Lenguaje:EN
Publicado: Dove Medical Press 2020
Materias:
astigmatism
anterior corneal astigmatism
ocular residual astigmatism
and refractive surgeries.
Ophthalmology
RE1-994
Acceso en línea:https://doaj.org/article/48901adfa0384376aa8997381010d08f
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spelling oai:doaj.org-article:48901adfa0384376aa8997381010d08f2021-12-02T11:05:07ZContributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample1177-5483https://doaj.org/article/48901adfa0384376aa8997381010d08f2020-07-01T00:00:00Zhttps://www.dovepress.com/contributions-of-anterior-corneal-and-ocular-residual-astigmatism-to-a-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Amr A Gab-Alla Ophthalmology Department, Faculty of Medicine, Suez Canal University, Ismailia, EgyptCorrespondence: Amr A Gab-AllaOphthalmology Department, Faculty of Medicine, Suez Canal University, Ring Road, Ismailia, EgyptTel +20 1222836261Email amrophth@hotmail.comAim: To evaluate the contributions of anterior corneal and ocular residual astigmatism to autorefraction astigmatism in adult myopic and myopic astigmatic subjects and how these compensate each other.Subjects and Methods: This retrospective study was completed in private eye centre, Ismailia, Egypt, between September 2017 and November 2019. The study included eyes with myopia (0.5 to 10.0D) or myopic astigmatism (0 to 8.5D). The refractive errors, including autorefraction astigmatism, were measured after using 1% cyclopentolate with autorefractometer (Topcon, Tokyo Optical Co., Ltd., Japan). Corneal topography (Sirius; CSO, Florence, Italy) was used to measure anterior corneal astigmatism. Ocular residual astigmatism was measured by vectorial subtraction of the anterior corneal astigmatism from autorefraction astigmatism determined to the corneal plane.Results: This study included 1158 eyes (right 582 and left 576) with myopia or myopic astigmatism of 582 participants (206 males with 406 eyes and 376 females with 752 eyes). The mean±SD age of the total participants was 26± 5.7 years, range (21 to 50 years). The mean±SD of spherical error was − 3.2± 1.9D, range (− 0.5 to − 10.0D). The mean±SD of autorefraction astigmatism was 1.13± 1.1D; range (0.5 to 8.5D). The mean±SD of anterior corneal astigmatism was 1.22± 0.8D; range (0.03 to 5.6D). The mean±SD of ocular residual astigmatism was 0.6± 0.5D; range (0 to 4.8D). Of the total eyes, 75.4% had significant autorefraction astigmatism, 82.5% had significant anterior corneal astigmatism, and 16.8% had significant ocular residual astigmatism.Conclusion: The percentage of the significant autorefraction astigmatism (> 0.5D) was 75.4% which is mainly anterior corneal. In 26.8% of participants, anterior corneal astigmatism is compensated by ocular residual astigmatism.Keywords: astigmatism, anterior corneal astigmatism, ocular residual astigmatism, refractive surgeriesGab-Alla AADove Medical Pressarticleastigmatismanterior corneal astigmatismocular residual astigmatismand refractive surgeries.OphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 14, Pp 2125-2134 (2020)
institution DOAJ
collection DOAJ
language EN
topic astigmatism
anterior corneal astigmatism
ocular residual astigmatism
and refractive surgeries.
Ophthalmology
RE1-994
spellingShingle astigmatism
anterior corneal astigmatism
ocular residual astigmatism
and refractive surgeries.
Ophthalmology
RE1-994
Gab-Alla AA
Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample
description Amr A Gab-Alla Ophthalmology Department, Faculty of Medicine, Suez Canal University, Ismailia, EgyptCorrespondence: Amr A Gab-AllaOphthalmology Department, Faculty of Medicine, Suez Canal University, Ring Road, Ismailia, EgyptTel +20 1222836261Email amrophth@hotmail.comAim: To evaluate the contributions of anterior corneal and ocular residual astigmatism to autorefraction astigmatism in adult myopic and myopic astigmatic subjects and how these compensate each other.Subjects and Methods: This retrospective study was completed in private eye centre, Ismailia, Egypt, between September 2017 and November 2019. The study included eyes with myopia (0.5 to 10.0D) or myopic astigmatism (0 to 8.5D). The refractive errors, including autorefraction astigmatism, were measured after using 1% cyclopentolate with autorefractometer (Topcon, Tokyo Optical Co., Ltd., Japan). Corneal topography (Sirius; CSO, Florence, Italy) was used to measure anterior corneal astigmatism. Ocular residual astigmatism was measured by vectorial subtraction of the anterior corneal astigmatism from autorefraction astigmatism determined to the corneal plane.Results: This study included 1158 eyes (right 582 and left 576) with myopia or myopic astigmatism of 582 participants (206 males with 406 eyes and 376 females with 752 eyes). The mean±SD age of the total participants was 26± 5.7 years, range (21 to 50 years). The mean±SD of spherical error was − 3.2± 1.9D, range (− 0.5 to − 10.0D). The mean±SD of autorefraction astigmatism was 1.13± 1.1D; range (0.5 to 8.5D). The mean±SD of anterior corneal astigmatism was 1.22± 0.8D; range (0.03 to 5.6D). The mean±SD of ocular residual astigmatism was 0.6± 0.5D; range (0 to 4.8D). Of the total eyes, 75.4% had significant autorefraction astigmatism, 82.5% had significant anterior corneal astigmatism, and 16.8% had significant ocular residual astigmatism.Conclusion: The percentage of the significant autorefraction astigmatism (> 0.5D) was 75.4% which is mainly anterior corneal. In 26.8% of participants, anterior corneal astigmatism is compensated by ocular residual astigmatism.Keywords: astigmatism, anterior corneal astigmatism, ocular residual astigmatism, refractive surgeries
format article
author Gab-Alla AA
author_facet Gab-Alla AA
author_sort Gab-Alla AA
title Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample
title_short Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample
title_full Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample
title_fullStr Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample
title_full_unstemmed Contributions of Anterior Corneal and Ocular Residual Astigmatism to Autorefraction Astigmatism in a Myopic Adult Sample
title_sort contributions of anterior corneal and ocular residual astigmatism to autorefraction astigmatism in a myopic adult sample
publisher Dove Medical Press
publishDate 2020
url https://doaj.org/article/48901adfa0384376aa8997381010d08f
work_keys_str_mv AT gaballaaa contributionsofanteriorcornealandocularresidualastigmatismtoautorefractionastigmatisminamyopicadultsample
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