Binocular coordination and reading performance during smartphone reading in intermittent exotropia

Masakazu Hirota,1 Hiroyuki Kanda,1 Takao Endo,2 Takeshi Morimoto,1 Tomomitsu Miyoshi,3 Takashi Fujikado1 1Department of Applied Visual Science, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; 2Department of Ophthalmology, Osaka University Graduate School of Medicine, Izumi, Osaka...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Hirota M, Kanda H, Endo T, Morimoto T, Miyoshi T, Fujikado T
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2018
Materias:	Eye movement smartphone reading video-oculography intermittent exotropia Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/dc3734e9e90e4985a28e987c0afbe751
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:dc3734e9e90e4985a28e987c0afbe751
record_format	dspace
spelling	oai:doaj.org-article:dc3734e9e90e4985a28e987c0afbe7512021-12-02T03:53:52ZBinocular coordination and reading performance during smartphone reading in intermittent exotropia1177-5483https://doaj.org/article/dc3734e9e90e4985a28e987c0afbe7512018-10-01T00:00:00Zhttps://www.dovepress.com/binocular-coordination-and-reading-performance-during-smartphone-readi-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Masakazu Hirota,1 Hiroyuki Kanda,1 Takao Endo,2 Takeshi Morimoto,1 Tomomitsu Miyoshi,3 Takashi Fujikado1 1Department of Applied Visual Science, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; 2Department of Ophthalmology, Osaka University Graduate School of Medicine, Izumi, Osaka, Japan; 3Department of Integrative Physiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan Purpose: This study aimed to evaluate binocular coordination using video-oculography during smartphone reading in patients with intermittent exotropia compared to individuals with normal vision. Patients and methods: Eleven youth and adult patients with intermittent exotropia (21.9±9.3 years) and 15 control subjects (26.6±4.3 years) were examined. Eye movements were recorded during smartphone reading at 50, 30, and 20 cm using video-oculography. The loss of binocular coordination was tentatively defined as a horizontal disparity greater than 2°. The proportion of monocular viewing was the percentage of time for which binocularity was lost during smartphone reading. The proportion of monocular viewing, the reading speed, and the correlation between proportion of monocular viewing and reading speed were analyzed. Results: The proportion of monocular viewing during smartphone reading was significantly higher in the intermittent exotropia group than in the control group (P<0.001). It was significantly more frequent at 20 cm than at 50 cm in the intermittent exotropia group (P<0.05). The reading speed was significantly negatively correlated with the proportion of monocular viewing at 30 and 20 cm in the intermittent exotropia group (P<0.05). Conclusion: A significant increase in the proportion of monocular viewing in the intermittent exotropia group suggests that an appropriate viewing distance should be advised so that users can maintain binocular coordination when viewing a smartphone. Keywords: eye movement, smartphone reading, video-oculography, intermittent exotropiaHirota MKanda HEndo TMorimoto TMiyoshi TFujikado TDove Medical PressarticleEye movementsmartphone readingvideo-oculographyintermittent exotropiaOphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 12, Pp 2069-2078 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Eye movement smartphone reading video-oculography intermittent exotropia Ophthalmology RE1-994
spellingShingle	Eye movement smartphone reading video-oculography intermittent exotropia Ophthalmology RE1-994 Hirota M Kanda H Endo T Morimoto T Miyoshi T Fujikado T Binocular coordination and reading performance during smartphone reading in intermittent exotropia
description	Masakazu Hirota,1 Hiroyuki Kanda,1 Takao Endo,2 Takeshi Morimoto,1 Tomomitsu Miyoshi,3 Takashi Fujikado1 1Department of Applied Visual Science, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; 2Department of Ophthalmology, Osaka University Graduate School of Medicine, Izumi, Osaka, Japan; 3Department of Integrative Physiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan Purpose: This study aimed to evaluate binocular coordination using video-oculography during smartphone reading in patients with intermittent exotropia compared to individuals with normal vision. Patients and methods: Eleven youth and adult patients with intermittent exotropia (21.9±9.3 years) and 15 control subjects (26.6±4.3 years) were examined. Eye movements were recorded during smartphone reading at 50, 30, and 20 cm using video-oculography. The loss of binocular coordination was tentatively defined as a horizontal disparity greater than 2°. The proportion of monocular viewing was the percentage of time for which binocularity was lost during smartphone reading. The proportion of monocular viewing, the reading speed, and the correlation between proportion of monocular viewing and reading speed were analyzed. Results: The proportion of monocular viewing during smartphone reading was significantly higher in the intermittent exotropia group than in the control group (P<0.001). It was significantly more frequent at 20 cm than at 50 cm in the intermittent exotropia group (P<0.05). The reading speed was significantly negatively correlated with the proportion of monocular viewing at 30 and 20 cm in the intermittent exotropia group (P<0.05). Conclusion: A significant increase in the proportion of monocular viewing in the intermittent exotropia group suggests that an appropriate viewing distance should be advised so that users can maintain binocular coordination when viewing a smartphone. Keywords: eye movement, smartphone reading, video-oculography, intermittent exotropia
format	article
author	Hirota M Kanda H Endo T Morimoto T Miyoshi T Fujikado T
author_facet	Hirota M Kanda H Endo T Morimoto T Miyoshi T Fujikado T
author_sort	Hirota M
title	Binocular coordination and reading performance during smartphone reading in intermittent exotropia
title_short	Binocular coordination and reading performance during smartphone reading in intermittent exotropia
title_full	Binocular coordination and reading performance during smartphone reading in intermittent exotropia
title_fullStr	Binocular coordination and reading performance during smartphone reading in intermittent exotropia
title_full_unstemmed	Binocular coordination and reading performance during smartphone reading in intermittent exotropia
title_sort	binocular coordination and reading performance during smartphone reading in intermittent exotropia
publisher	Dove Medical Press
publishDate	2018
url	https://doaj.org/article/dc3734e9e90e4985a28e987c0afbe751
work_keys_str_mv	AT hirotam binocularcoordinationandreadingperformanceduringsmartphonereadinginintermittentexotropia AT kandah binocularcoordinationandreadingperformanceduringsmartphonereadinginintermittentexotropia AT endot binocularcoordinationandreadingperformanceduringsmartphonereadinginintermittentexotropia AT morimotot binocularcoordinationandreadingperformanceduringsmartphonereadinginintermittentexotropia AT miyoshit binocularcoordinationandreadingperformanceduringsmartphonereadinginintermittentexotropia AT fujikadot binocularcoordinationandreadingperformanceduringsmartphonereadinginintermittentexotropia
_version_	1718401583801171968

Binocular coordination and reading performance during smartphone reading in intermittent exotropia

Ejemplares similares