Developmental change of the biorbital angle in normal Japanese infants

Teiji Yagasaki,1,2 Yoshimi Yokoyama,2 Makiko Tsukui2 1Yagasaki Eye Clinic, Ichinomiya, Aichi, Japan; 2Department of Ophthalmology, Japan Community Health Care Organization Chukyo Hospital, Nagoya, Aichi, Japan Purpose: To investigate postnatal changes in the biorbital angle in normal Japanese chil...

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Autores principales:	Yagasaki T, Yokoyama Y, Tsukui M
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2018
Materias:	orbit computed tomography magnetic resonance imaging exotropia infant Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/d1b9529f1e5245e498181e6a5ef6efe6
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spelling	oai:doaj.org-article:d1b9529f1e5245e498181e6a5ef6efe62021-12-02T03:03:58ZDevelopmental change of the biorbital angle in normal Japanese infants1177-5483https://doaj.org/article/d1b9529f1e5245e498181e6a5ef6efe62018-10-01T00:00:00Zhttps://www.dovepress.com/developmental-change-of-the-biorbital-angle-in-normal-japanese-infants-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Teiji Yagasaki,1,2 Yoshimi Yokoyama,2 Makiko Tsukui2 1Yagasaki Eye Clinic, Ichinomiya, Aichi, Japan; 2Department of Ophthalmology, Japan Community Health Care Organization Chukyo Hospital, Nagoya, Aichi, Japan Purpose: To investigate postnatal changes in the biorbital angle in normal Japanese children. Subjects and methods: Axial imaging of the orbit in the transverse plane of the horizontal extraocular muscles was obtained in 129 ophthalmologically healthy infants (age ranging from a few months to 11 years). The opening angle between both lateral walls of the orbit was defined as the biorbital angle. Results: The mean biorbital angle in 11 infants less than a year of age was 105.0°±6.0°. The mean biorbital angles for each of the subsequent age groups were 97.7°±3.1°, 96.2°±4.0°, 96.3°±4.1°, 92.8°±3.8°, 92.3°±2.3°, 93.1°±2.8°, 91.5°±3.9°, 91.9°±2.3°, 91.4°±2.3°, and 90.9°±3.1°. The mean biorbital angle in infants less than a year old was significantly larger than those found in the groups of infants older than 1 year (P<0.01, Newman–Keuls test). Conclusion: The biorbital angle in infants less than a year old was larger than that found in infants older than 1 year, with this larger biorbital angle potentially the causative factor of the observed exotropia seen in 70%–80% of newborns gradually disappearing in most cases by 2–4 months of age. Keywords: orbit, computed tomography, magnetic resonance imaging, exotropia, infantYagasaki TYokoyama YTsukui MDove Medical Pressarticleorbitcomputed tomographymagnetic resonance imagingexotropiainfantOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 12, Pp 2047-2051 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	orbit computed tomography magnetic resonance imaging exotropia infant Ophthalmology RE1-994
spellingShingle	orbit computed tomography magnetic resonance imaging exotropia infant Ophthalmology RE1-994 Yagasaki T Yokoyama Y Tsukui M Developmental change of the biorbital angle in normal Japanese infants
description	Teiji Yagasaki,1,2 Yoshimi Yokoyama,2 Makiko Tsukui2 1Yagasaki Eye Clinic, Ichinomiya, Aichi, Japan; 2Department of Ophthalmology, Japan Community Health Care Organization Chukyo Hospital, Nagoya, Aichi, Japan Purpose: To investigate postnatal changes in the biorbital angle in normal Japanese children. Subjects and methods: Axial imaging of the orbit in the transverse plane of the horizontal extraocular muscles was obtained in 129 ophthalmologically healthy infants (age ranging from a few months to 11 years). The opening angle between both lateral walls of the orbit was defined as the biorbital angle. Results: The mean biorbital angle in 11 infants less than a year of age was 105.0°±6.0°. The mean biorbital angles for each of the subsequent age groups were 97.7°±3.1°, 96.2°±4.0°, 96.3°±4.1°, 92.8°±3.8°, 92.3°±2.3°, 93.1°±2.8°, 91.5°±3.9°, 91.9°±2.3°, 91.4°±2.3°, and 90.9°±3.1°. The mean biorbital angle in infants less than a year old was significantly larger than those found in the groups of infants older than 1 year (P<0.01, Newman–Keuls test). Conclusion: The biorbital angle in infants less than a year old was larger than that found in infants older than 1 year, with this larger biorbital angle potentially the causative factor of the observed exotropia seen in 70%–80% of newborns gradually disappearing in most cases by 2–4 months of age. Keywords: orbit, computed tomography, magnetic resonance imaging, exotropia, infant
format	article
author	Yagasaki T Yokoyama Y Tsukui M
author_facet	Yagasaki T Yokoyama Y Tsukui M
author_sort	Yagasaki T
title	Developmental change of the biorbital angle in normal Japanese infants
title_short	Developmental change of the biorbital angle in normal Japanese infants
title_full	Developmental change of the biorbital angle in normal Japanese infants
title_fullStr	Developmental change of the biorbital angle in normal Japanese infants
title_full_unstemmed	Developmental change of the biorbital angle in normal Japanese infants
title_sort	developmental change of the biorbital angle in normal japanese infants
publisher	Dove Medical Press
publishDate	2018
url	https://doaj.org/article/d1b9529f1e5245e498181e6a5ef6efe6
work_keys_str_mv	AT yagasakit developmentalchangeofthebiorbitalangleinnormaljapaneseinfants AT yokoyamay developmentalchangeofthebiorbitalangleinnormaljapaneseinfants AT tsukuim developmentalchangeofthebiorbitalangleinnormaljapaneseinfants
_version_	1718402010216136704

Developmental change of the biorbital angle in normal Japanese infants

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