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Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study

Bright light therapy is a treatment modality for seasonal affective disorder and circadian rhythm disorders in which artificial light of 2,500 lux or higher at the eye is effective. Although short-wavelength visible light is more effective than long-wavelength visible light, it may be hazardous to t...

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Autores principales: Miura, Jun, Yuasa, Tomonori, Sugai, Yasunori, Yamagami, Kana, Aizu, Yoshihisa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6193335/
https://www.ncbi.nlm.nih.gov/pubmed/30402294
http://dx.doi.org/10.1155/2018/2378630
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author Miura, Jun
Yuasa, Tomonori
Sugai, Yasunori
Yamagami, Kana
Aizu, Yoshihisa
author_facet Miura, Jun
Yuasa, Tomonori
Sugai, Yasunori
Yamagami, Kana
Aizu, Yoshihisa
author_sort Miura, Jun
collection PubMed
description Bright light therapy is a treatment modality for seasonal affective disorder and circadian rhythm disorders in which artificial light of 2,500 lux or higher at the eye is effective. Although short-wavelength visible light is more effective than long-wavelength visible light, it may be hazardous to the retina. Recently, light-emitting diodes (LEDs) have been used as the light source in bright light therapy apparatuses. We developed goggles for bright light therapy equipped with LEDs as the light source. The aim of this study was to examine the efficacy and safety of our goggles when emitting 10,000-lux light with its short-wavelength light content reduced by 30% or 50% (denoted as 30%-cut and 50%-cut light, respectively, henceforth). Six healthy young males participated in this study. They were administered no light, 50%-cut light, and 30%-cut light for 30 min early in the morning for 4 days each. Subjective sleepiness and sleep quality were evaluated by the Stanford Sleepiness Scale (SSS) and the Oguri–Shirakawa–Azumi sleep inventory MA version (OSA-MA), respectively. Subjective sleepiness evaluated by the SSS and the subscale of the OSA-MA significantly decreased with 30%-cut light compared with no light. Psychomotor performance evaluated by a calculation task improved with the 30%-cut light, although not significant after multiple comparisons were considered. No abnormality was found by ophthalmoscopy and the vision test. In conclusion, our goggles with 30%-cut light may be safe and have an awakening effect.
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spelling pubmed-61933352018-11-06 Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study Miura, Jun Yuasa, Tomonori Sugai, Yasunori Yamagami, Kana Aizu, Yoshihisa Sleep Disord Clinical Study Bright light therapy is a treatment modality for seasonal affective disorder and circadian rhythm disorders in which artificial light of 2,500 lux or higher at the eye is effective. Although short-wavelength visible light is more effective than long-wavelength visible light, it may be hazardous to the retina. Recently, light-emitting diodes (LEDs) have been used as the light source in bright light therapy apparatuses. We developed goggles for bright light therapy equipped with LEDs as the light source. The aim of this study was to examine the efficacy and safety of our goggles when emitting 10,000-lux light with its short-wavelength light content reduced by 30% or 50% (denoted as 30%-cut and 50%-cut light, respectively, henceforth). Six healthy young males participated in this study. They were administered no light, 50%-cut light, and 30%-cut light for 30 min early in the morning for 4 days each. Subjective sleepiness and sleep quality were evaluated by the Stanford Sleepiness Scale (SSS) and the Oguri–Shirakawa–Azumi sleep inventory MA version (OSA-MA), respectively. Subjective sleepiness evaluated by the SSS and the subscale of the OSA-MA significantly decreased with 30%-cut light compared with no light. Psychomotor performance evaluated by a calculation task improved with the 30%-cut light, although not significant after multiple comparisons were considered. No abnormality was found by ophthalmoscopy and the vision test. In conclusion, our goggles with 30%-cut light may be safe and have an awakening effect. Hindawi 2018-10-04 /pmc/articles/PMC6193335/ /pubmed/30402294 http://dx.doi.org/10.1155/2018/2378630 Text en Copyright © 2018 Jun Miura et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Clinical Study
Miura, Jun
Yuasa, Tomonori
Sugai, Yasunori
Yamagami, Kana
Aizu, Yoshihisa
Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study
title Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study
title_full Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study
title_fullStr Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study
title_full_unstemmed Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study
title_short Effects of Bright Light with Reduced Blue Light on Sleepiness on Rising: A Small Exploratory Study
title_sort effects of bright light with reduced blue light on sleepiness on rising: a small exploratory study
topic Clinical Study
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6193335/
https://www.ncbi.nlm.nih.gov/pubmed/30402294
http://dx.doi.org/10.1155/2018/2378630
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