Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT

Dina El-Fayoumi,1 Nermeen Bahgat,1 Mohamed Khafagy,1 Ragai Hatata,2 Dalia Sabry,3 Ghada Allam,3 Manal Ali Kasem,3 Sherin Sadek2 1Ophthalmology Department, Faculty of Medicine, Cairo University, Cairo, Egypt; 2Ophthalmology Department, Faculty of Medicine, Fayoum University, Fayoum, Egypt; 3Mansoura...

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Autores principales:	El-Fayoumi D, Bahgat N, Khafagy M, Hatata R, Sabry D, Allam G, Kasem MA, Sadek S
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2020
Materias:	as-oct axial length extraocular muscle insertion site swept-source oct Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/656846acf76c441baed4c752d4b43a2d
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spelling	oai:doaj.org-article:656846acf76c441baed4c752d4b43a2d2021-12-02T11:19:12ZHorizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT1177-5483https://doaj.org/article/656846acf76c441baed4c752d4b43a2d2020-10-01T00:00:00Zhttps://www.dovepress.com/horizontal-extraocular-muscle-insertion-site-in-relation-to-axial-leng-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Dina El-Fayoumi,1 Nermeen Bahgat,1 Mohamed Khafagy,1 Ragai Hatata,2 Dalia Sabry,3 Ghada Allam,3 Manal Ali Kasem,3 Sherin Sadek2 1Ophthalmology Department, Faculty of Medicine, Cairo University, Cairo, Egypt; 2Ophthalmology Department, Faculty of Medicine, Fayoum University, Fayoum, Egypt; 3Mansoura Ophthalmic Centre, Faculty of Medicine, Mansoura University, Mansoura, EgyptCorrespondence: Sherin SadekFaculty of Medicine, Fayoum University, 2/7 Zahraa EL Maadi, 4th Floor, Dep. 45, Fayoum 11435, EgyptTel +20 1006232012Email sh.sadek@gmail.comPurpose: The purpose of this study was to correlate between the axial length of the globe and the insertion site of horizontal extraocular muscles using swept-source anterior segment optical coherence tomography (SS-ASOCT), with posing an equation to calculate the muscle insertion site from the axial length.Methods: The study design was observational and cross-sectional. It was performed on 157 eyes of 157 healthy subjects. The distance of the medial rectus (MR) and the lateral rectus (LR) insertion sites from the limbus were measured using SS-ASOCT. The insertion sites’ distances were correlated to the axial length (hypermetropes < 22.5 mm, myopes > 24.5). Correlation between numerical variables was done by Pearson’s correlation coefficient and confirmed by linear regression analysis and scatter diagrams.Results: The mean MR insertion site was 5.47 ± 0.19 mm in hypermetropes versus 5.68 ± 0.23 mm in myopes, whereas the mean LR insertion site was 6.81± 0.23 mm in hyperopes versus 7.08 ± 0.16 mm in myopes. The axial length showed a moderate positive, but significant, correlation to the insertional position for the medial and lateral rectus muscles (MR: r=0.417, p< 0.001; LR: r=0.410, p< 0.001).Conclusion: Comparing the horizontal extraocular muscle insertion site to axial length using SS-ASOCT showed a significant positive correlation. The model equation for MR insertion: MR (mm) = 4.522 + 0.045 (AXL in mm) with an R = 0.437, R2= 0.191, F=12.071, P< 0.001. The model equation for LR insertion: LR (mm) = 5.72 + 0.048 (AXL in mm) with an R = 0.438, R2= 0.192, F=12.116, P< 0.001.Keywords: AS-OCT, axial length, extraocular muscle insertion site, swept-source OCTEl-Fayoumi DBahgat NKhafagy MHatata RSabry DAllam GKasem MASadek SDove Medical Pressarticleas-octaxial lengthextraocular muscle insertion siteswept-source octOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 14, Pp 3583-3589 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	as-oct axial length extraocular muscle insertion site swept-source oct Ophthalmology RE1-994
spellingShingle	as-oct axial length extraocular muscle insertion site swept-source oct Ophthalmology RE1-994 El-Fayoumi D Bahgat N Khafagy M Hatata R Sabry D Allam G Kasem MA Sadek S Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT
description	Dina El-Fayoumi,1 Nermeen Bahgat,1 Mohamed Khafagy,1 Ragai Hatata,2 Dalia Sabry,3 Ghada Allam,3 Manal Ali Kasem,3 Sherin Sadek2 1Ophthalmology Department, Faculty of Medicine, Cairo University, Cairo, Egypt; 2Ophthalmology Department, Faculty of Medicine, Fayoum University, Fayoum, Egypt; 3Mansoura Ophthalmic Centre, Faculty of Medicine, Mansoura University, Mansoura, EgyptCorrespondence: Sherin SadekFaculty of Medicine, Fayoum University, 2/7 Zahraa EL Maadi, 4th Floor, Dep. 45, Fayoum 11435, EgyptTel +20 1006232012Email sh.sadek@gmail.comPurpose: The purpose of this study was to correlate between the axial length of the globe and the insertion site of horizontal extraocular muscles using swept-source anterior segment optical coherence tomography (SS-ASOCT), with posing an equation to calculate the muscle insertion site from the axial length.Methods: The study design was observational and cross-sectional. It was performed on 157 eyes of 157 healthy subjects. The distance of the medial rectus (MR) and the lateral rectus (LR) insertion sites from the limbus were measured using SS-ASOCT. The insertion sites’ distances were correlated to the axial length (hypermetropes < 22.5 mm, myopes > 24.5). Correlation between numerical variables was done by Pearson’s correlation coefficient and confirmed by linear regression analysis and scatter diagrams.Results: The mean MR insertion site was 5.47 ± 0.19 mm in hypermetropes versus 5.68 ± 0.23 mm in myopes, whereas the mean LR insertion site was 6.81± 0.23 mm in hyperopes versus 7.08 ± 0.16 mm in myopes. The axial length showed a moderate positive, but significant, correlation to the insertional position for the medial and lateral rectus muscles (MR: r=0.417, p< 0.001; LR: r=0.410, p< 0.001).Conclusion: Comparing the horizontal extraocular muscle insertion site to axial length using SS-ASOCT showed a significant positive correlation. The model equation for MR insertion: MR (mm) = 4.522 + 0.045 (AXL in mm) with an R = 0.437, R2= 0.191, F=12.071, P< 0.001. The model equation for LR insertion: LR (mm) = 5.72 + 0.048 (AXL in mm) with an R = 0.438, R2= 0.192, F=12.116, P< 0.001.Keywords: AS-OCT, axial length, extraocular muscle insertion site, swept-source OCT
format	article
author	El-Fayoumi D Bahgat N Khafagy M Hatata R Sabry D Allam G Kasem MA Sadek S
author_facet	El-Fayoumi D Bahgat N Khafagy M Hatata R Sabry D Allam G Kasem MA Sadek S
author_sort	El-Fayoumi D
title	Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT
title_short	Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT
title_full	Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT
title_fullStr	Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT
title_full_unstemmed	Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT
title_sort	horizontal extraocular muscle insertion site in relation to axial length using swept-source anterior segment oct
publisher	Dove Medical Press
publishDate	2020
url	https://doaj.org/article/656846acf76c441baed4c752d4b43a2d
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Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT

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