Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism

Abstract We investigated the relation between corneal regular and irregular astigmatism in normal human eyes. In 951 eyes of 951 patients, corneal irregular astigmatism, such as asymmetry and higher-order irregularity components, was calculated using the Fourier harmonic analysis of corneal topograp...

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Autores principales:	Yuta Ueno, Risa Nomura, Takahiro Hiraoka, Katsuhito Kinoshita, Mutsuko Ohara, Tetsuro Oshika
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8b7c888d85064415bcf1b2355870c13c
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spelling	oai:doaj.org-article:8b7c888d85064415bcf1b2355870c13c2021-12-02T16:35:18ZComparison of corneal irregular astigmatism by the type of corneal regular astigmatism10.1038/s41598-021-95358-z2045-2322https://doaj.org/article/8b7c888d85064415bcf1b2355870c13c2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95358-zhttps://doaj.org/toc/2045-2322Abstract We investigated the relation between corneal regular and irregular astigmatism in normal human eyes. In 951 eyes of 951 patients, corneal irregular astigmatism, such as asymmetry and higher-order irregularity components, was calculated using the Fourier harmonic analysis of corneal topography data within the central 3-mm zone of the anterior corneal surface. The eyes were classified by the type of corneal regular astigmatism into four groups; minimum (< 0.75 diopters), with-the-rule (WTR), against-the-rule (ATR), and oblique astigmatism. The mean age was significantly different among the four groups (P < 0.001); patients with WTR astigmatism were the youngest, followed by those with minimum, oblique, and ATR astigmatism. Significant inter-group differences were found among the four groups in asymmetry (P = 0.005) and higher-order irregularity components (P < 0.001); the largest was in eyes with oblique astigmatism, followed by ATR, WTR, and minimum astigmatism. The stepwise multiple regression analysis revealed that corneal regular astigmatism pattern significantly influenced the amount of corneal irregular astigmatism after controlling for confounding factors (P < 0.001). Corneal irregular astigmatism, such as asymmetry and higher order irregularity components, was the largest in eyes with oblique astigmatism, followed by those with ATR, WTR, and minimum astigmatism, even after adjustment for age of subjects.Yuta UenoRisa NomuraTakahiro HiraokaKatsuhito KinoshitaMutsuko OharaTetsuro OshikaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuta Ueno Risa Nomura Takahiro Hiraoka Katsuhito Kinoshita Mutsuko Ohara Tetsuro Oshika Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
description	Abstract We investigated the relation between corneal regular and irregular astigmatism in normal human eyes. In 951 eyes of 951 patients, corneal irregular astigmatism, such as asymmetry and higher-order irregularity components, was calculated using the Fourier harmonic analysis of corneal topography data within the central 3-mm zone of the anterior corneal surface. The eyes were classified by the type of corneal regular astigmatism into four groups; minimum (< 0.75 diopters), with-the-rule (WTR), against-the-rule (ATR), and oblique astigmatism. The mean age was significantly different among the four groups (P < 0.001); patients with WTR astigmatism were the youngest, followed by those with minimum, oblique, and ATR astigmatism. Significant inter-group differences were found among the four groups in asymmetry (P = 0.005) and higher-order irregularity components (P < 0.001); the largest was in eyes with oblique astigmatism, followed by ATR, WTR, and minimum astigmatism. The stepwise multiple regression analysis revealed that corneal regular astigmatism pattern significantly influenced the amount of corneal irregular astigmatism after controlling for confounding factors (P < 0.001). Corneal irregular astigmatism, such as asymmetry and higher order irregularity components, was the largest in eyes with oblique astigmatism, followed by those with ATR, WTR, and minimum astigmatism, even after adjustment for age of subjects.
format	article
author	Yuta Ueno Risa Nomura Takahiro Hiraoka Katsuhito Kinoshita Mutsuko Ohara Tetsuro Oshika
author_facet	Yuta Ueno Risa Nomura Takahiro Hiraoka Katsuhito Kinoshita Mutsuko Ohara Tetsuro Oshika
author_sort	Yuta Ueno
title	Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
title_short	Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
title_full	Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
title_fullStr	Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
title_full_unstemmed	Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
title_sort	comparison of corneal irregular astigmatism by the type of corneal regular astigmatism
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8b7c888d85064415bcf1b2355870c13c
work_keys_str_mv	AT yutaueno comparisonofcornealirregularastigmatismbythetypeofcornealregularastigmatism AT risanomura comparisonofcornealirregularastigmatismbythetypeofcornealregularastigmatism AT takahirohiraoka comparisonofcornealirregularastigmatismbythetypeofcornealregularastigmatism AT katsuhitokinoshita comparisonofcornealirregularastigmatismbythetypeofcornealregularastigmatism AT mutsukoohara comparisonofcornealirregularastigmatismbythetypeofcornealregularastigmatism AT tetsurooshika comparisonofcornealirregularastigmatismbythetypeofcornealregularastigmatism
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Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism

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