Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue

Ching-Huang Lin,1 Hsien-Chang Lin,2 Chien-Yu Chen,3 Chong-Chung Lih4 1Department of Electronic Engineering, National Yunlin University of Science & Technology, Yunlin, 640, Taiwan; 2Graduate School of Engineering Science and Technology, National Yunlin University of Science & Technology, Yun...

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Autores principales:	Lin CH, Lin HC, Chen CY, Lih CC
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2021
Materias:	low-level laser irradiation myopia teenager accommodation auricular point Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/b20b795611104d2ab4423ae7cf499c67
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spelling	oai:doaj.org-article:b20b795611104d2ab4423ae7cf499c672021-12-02T17:08:01ZEffect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue1177-5483https://doaj.org/article/b20b795611104d2ab4423ae7cf499c672021-08-01T00:00:00Zhttps://www.dovepress.com/effect-of-low-level-laser-irradiation-on-accommodation-and-visual-fati-peer-reviewed-fulltext-article-OPTHhttps://doaj.org/toc/1177-5483Ching-Huang Lin,1 Hsien-Chang Lin,2 Chien-Yu Chen,3 Chong-Chung Lih4 1Department of Electronic Engineering, National Yunlin University of Science & Technology, Yunlin, 640, Taiwan; 2Graduate School of Engineering Science and Technology, National Yunlin University of Science & Technology, Yunlin, 640, Taiwan; 3Graduate Institute of Color and Illumination Technology, National Taiwan University of Science and Technology, Taipei, 106, Taiwan; 4Department of Optometry, Central Taiwan University of Science and Technology, Taichung, 406, TaiwanCorrespondence: Chong-Chung LihDepartment of Optometry, Central Taiwan University of Science and Technology, Taichung, 406, TaiwanTel +866 4 22391647 6981Email cclih@phys.nthu.edu.twPurpose: This study used low-level laser irradiation on auricular points for the eyes of junior college teenagers with myopia to observe the changes in refractive errors and eye accommodation. According to the Sterner’s study, we used the relationship between the amplitude and subjective symptoms to assess the degree of improvement in visual fatigue caused by changes in accommodation.Methods: Participants were 49 healthy junior college teenagers, with an average age of 16.04± 0.80 years old, and the refractive errors of both eyes were between − 1.50 D and − 5.00 D. All participants underwent refractive error tests before and after class and after a 30-min break. In a 30-min break, all participants underwent two tests of with (experimental group) and without (control group) low-level laser irradiation on the auricular points. Then, refractive error tests were conducted to evaluate the participants’ eye accommodation.Results: The results revealed that with treatment of the auricular points with and without low-level laser irradiation, the refractive error of the participants’ binocular left and right eyes decreased by − 0.12 D (− 0.18 D) in the experimental grou and by − 0.05 D (− 0.02D) in the control group. For the amplitudes of accommodation (AA) examination, the AA of the participants’ binocular in the experimental group became 7.98 ± 1.35 D (7.65 ± 1.37 D). The AA of participants’ binocular can recover to the level before the class.Conclusion: The results indicated that low-level laser irradiation at auricular points restored the eye accommodation faster than did natural closing of the eyes.Keywords: low-level laser irradiation, myopia, teenager, accommodation, auricular pointLin CHLin HCChen CYLih CCDove Medical Pressarticlelow-level laser irradiationmyopiateenageraccommodationauricular pointOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 15, Pp 3431-3439 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	low-level laser irradiation myopia teenager accommodation auricular point Ophthalmology RE1-994
spellingShingle	low-level laser irradiation myopia teenager accommodation auricular point Ophthalmology RE1-994 Lin CH Lin HC Chen CY Lih CC Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue
description	Ching-Huang Lin,1 Hsien-Chang Lin,2 Chien-Yu Chen,3 Chong-Chung Lih4 1Department of Electronic Engineering, National Yunlin University of Science & Technology, Yunlin, 640, Taiwan; 2Graduate School of Engineering Science and Technology, National Yunlin University of Science & Technology, Yunlin, 640, Taiwan; 3Graduate Institute of Color and Illumination Technology, National Taiwan University of Science and Technology, Taipei, 106, Taiwan; 4Department of Optometry, Central Taiwan University of Science and Technology, Taichung, 406, TaiwanCorrespondence: Chong-Chung LihDepartment of Optometry, Central Taiwan University of Science and Technology, Taichung, 406, TaiwanTel +866 4 22391647 6981Email cclih@phys.nthu.edu.twPurpose: This study used low-level laser irradiation on auricular points for the eyes of junior college teenagers with myopia to observe the changes in refractive errors and eye accommodation. According to the Sterner’s study, we used the relationship between the amplitude and subjective symptoms to assess the degree of improvement in visual fatigue caused by changes in accommodation.Methods: Participants were 49 healthy junior college teenagers, with an average age of 16.04± 0.80 years old, and the refractive errors of both eyes were between − 1.50 D and − 5.00 D. All participants underwent refractive error tests before and after class and after a 30-min break. In a 30-min break, all participants underwent two tests of with (experimental group) and without (control group) low-level laser irradiation on the auricular points. Then, refractive error tests were conducted to evaluate the participants’ eye accommodation.Results: The results revealed that with treatment of the auricular points with and without low-level laser irradiation, the refractive error of the participants’ binocular left and right eyes decreased by − 0.12 D (− 0.18 D) in the experimental grou and by − 0.05 D (− 0.02D) in the control group. For the amplitudes of accommodation (AA) examination, the AA of the participants’ binocular in the experimental group became 7.98 ± 1.35 D (7.65 ± 1.37 D). The AA of participants’ binocular can recover to the level before the class.Conclusion: The results indicated that low-level laser irradiation at auricular points restored the eye accommodation faster than did natural closing of the eyes.Keywords: low-level laser irradiation, myopia, teenager, accommodation, auricular point
format	article
author	Lin CH Lin HC Chen CY Lih CC
author_facet	Lin CH Lin HC Chen CY Lih CC
author_sort	Lin CH
title	Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue
title_short	Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue
title_full	Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue
title_fullStr	Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue
title_full_unstemmed	Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue
title_sort	effect of low-level laser irradiation on accommodation and visual fatigue
publisher	Dove Medical Press
publishDate	2021
url	https://doaj.org/article/b20b795611104d2ab4423ae7cf499c67
work_keys_str_mv	AT linch effectoflowlevellaserirradiationonaccommodationandvisualfatigue AT linhc effectoflowlevellaserirradiationonaccommodationandvisualfatigue AT chency effectoflowlevellaserirradiationonaccommodationandvisualfatigue AT lihcc effectoflowlevellaserirradiationonaccommodationandvisualfatigue
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Effect of Low-Level Laser Irradiation on Accommodation and Visual Fatigue

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