Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population

Mohamed Hosny, Alaa Badawy, Lobna Khazbak, Mohamed Anis, Sarah Azzam Ophthalmology, Cairo University, Giza, EgyptCorrespondence: Mohamed HosnyOphthalmology, Cairo University, 84 Shehab Street, Mohandeseen, Giza 12411, EgyptTel +20 1000007675Email mohamedhosny@kasralainy.edu.egPurpose: To determine t...

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Autores principales:	Hosny M, Badawy A, Khazbak L, Anis M, Azzam S
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2020
Materias:	posterior corneal astigmatism total corneal astigmatism scheimpflug imaging vector analysis Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/afba1ad17035459a8ab7a369e61061cd
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spelling	oai:doaj.org-article:afba1ad17035459a8ab7a369e61061cd2021-12-02T04:02:07ZContribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population1177-5483https://doaj.org/article/afba1ad17035459a8ab7a369e61061cd2020-10-01T00:00:00Zhttps://www.dovepress.com/contribution-of-posterior-corneal-astigmatism-to-total-corneal-astigma-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Mohamed Hosny, Alaa Badawy, Lobna Khazbak, Mohamed Anis, Sarah Azzam Ophthalmology, Cairo University, Giza, EgyptCorrespondence: Mohamed HosnyOphthalmology, Cairo University, 84 Shehab Street, Mohandeseen, Giza 12411, EgyptTel +20 1000007675Email mohamedhosny@kasralainy.edu.egPurpose: To determine the percentage of contribution of the magnitude of posterior corneal astigmatism to total corneal astigmatism using Scheimpflug imaging.Methods: This prospective cross-sectional study was conducted on 356 eyes of 356 patients, where the total corneal astigmatism was calculated by addition of anterior and posterior corneal astigmatism using vector analysis and then the percentage of posterior to total corneal astigmatism was calculated.Results: The percentage of contribution of posterior to total corneal astigmatism was about 30% in patients with With The Rule astigmatism and about 8% in patients with Against The Rule astigmatism.Conclusion: Posterior corneal astigmatism should not be neglected during calculation of total corneal astigmatism as neglecting posterior corneal astigmatism can result in errors during calculation and correction of astigmatism.Keywords: posterior corneal astigmatism, total corneal astigmatism, Scheimpflug imaging, vector analysisHosny MBadawy AKhazbak LAnis MAzzam SDove Medical Pressarticleposterior corneal astigmatismtotal corneal astigmatismscheimpflug imagingvector analysisOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 14, Pp 3325-3330 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	posterior corneal astigmatism total corneal astigmatism scheimpflug imaging vector analysis Ophthalmology RE1-994
spellingShingle	posterior corneal astigmatism total corneal astigmatism scheimpflug imaging vector analysis Ophthalmology RE1-994 Hosny M Badawy A Khazbak L Anis M Azzam S Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
description	Mohamed Hosny, Alaa Badawy, Lobna Khazbak, Mohamed Anis, Sarah Azzam Ophthalmology, Cairo University, Giza, EgyptCorrespondence: Mohamed HosnyOphthalmology, Cairo University, 84 Shehab Street, Mohandeseen, Giza 12411, EgyptTel +20 1000007675Email mohamedhosny@kasralainy.edu.egPurpose: To determine the percentage of contribution of the magnitude of posterior corneal astigmatism to total corneal astigmatism using Scheimpflug imaging.Methods: This prospective cross-sectional study was conducted on 356 eyes of 356 patients, where the total corneal astigmatism was calculated by addition of anterior and posterior corneal astigmatism using vector analysis and then the percentage of posterior to total corneal astigmatism was calculated.Results: The percentage of contribution of posterior to total corneal astigmatism was about 30% in patients with With The Rule astigmatism and about 8% in patients with Against The Rule astigmatism.Conclusion: Posterior corneal astigmatism should not be neglected during calculation of total corneal astigmatism as neglecting posterior corneal astigmatism can result in errors during calculation and correction of astigmatism.Keywords: posterior corneal astigmatism, total corneal astigmatism, Scheimpflug imaging, vector analysis
format	article
author	Hosny M Badawy A Khazbak L Anis M Azzam S
author_facet	Hosny M Badawy A Khazbak L Anis M Azzam S
author_sort	Hosny M
title	Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
title_short	Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
title_full	Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
title_fullStr	Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
title_full_unstemmed	Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
title_sort	contribution of posterior corneal astigmatism to total corneal astigmatism in a sample of egyptian population
publisher	Dove Medical Press
publishDate	2020
url	https://doaj.org/article/afba1ad17035459a8ab7a369e61061cd
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Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population

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