Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness

Jocelyn Cammack,1 John Whight,2 Vinette Cross,3 Andrew T Rider,1 Andrew R Webster,1,2 Andrew Stockman1 1Department of Visual Neuroscience, UCL Institute of Ophthalmology, 2Moorfields Eye Hospital, London, 3Centre for Health and Social Care Improvement, University of Wolverhampton, Wolverha...

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Autores principales:	Cammack J, Whight J, Cross V, Rider AT, Webster AR, Stockman A
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2016
Materias:	Congenital Stationary Night Blindness GRM6 protein narrative analysis perception psychophysics quality of life. Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/865b09938b3e4ff8a01727ce3b39fb5a
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spelling	oai:doaj.org-article:865b09938b3e4ff8a01727ce3b39fb5a2021-12-02T07:46:48ZPsychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness1177-5483https://doaj.org/article/865b09938b3e4ff8a01727ce3b39fb5a2016-08-01T00:00:00Zhttps://www.dovepress.com/psychophysical-measures-of-visual-function-and-everyday-perceptual-exp-peer-reviewed-article-OPTHhttps://doaj.org/toc/1177-5483Jocelyn Cammack,1 John Whight,2 Vinette Cross,3 Andrew T Rider,1 Andrew R Webster,1,2 Andrew Stockman1 1Department of Visual Neuroscience, UCL Institute of Ophthalmology, 2Moorfields Eye Hospital, London, 3Centre for Health and Social Care Improvement, University of Wolverhampton, Wolverhampton, UK Abstract: An appreciation of the relation between laboratory measures of visual deficit and everyday perceptual experience is fundamental to understanding the impact of a visual condition on patients and so to a fuller characterization of the disorder. This study aims to understand better the interpretative processes by which modified sensory information is perceived by a patient with congenital stationary night blindness and the adaptive strategies that are devised to deal with their measurable visual loss. Psychophysical measurements of temporal resolution, spectral sensitivity, and color discrimination were conducted on a 78-year-old male patient with the condition, who was also interviewed at length about the ways in which his diagnosis affected his daily life. Narrative analysis was employed to identify the relation between his subjective perceptual experiences and functional deficits in identifiable components of the visual system. Psychophysical measurements indicated a complete lack of rod perception and substantially reduced cone sensitivity. Two particular effects of this visual loss emerged during interviews: 1) the development of navigational techniques that relied on light reflections and point sources of light and 2) a reluctance to disclose the extent of visual loss and resulting lifelong psychosocial consequences. This study demonstrates the valuable complementary role that rich descriptive patient testimony can play, in conjunction with laboratory and clinical measurements, in more fully characterizing a disorder and in reaching a more complete understanding of the experience of vision loss. It also evidences the particular suitability of filmmaking techniques as a means of accessing and communicating subjective patient experience. Keywords: congenital stationary night blindness, GRM6 gene, narrative analysis, perception, psychophysics, quality of lifeCammack JWhight JCross VRider ATWebster ARStockman ADove Medical PressarticleCongenital Stationary Night BlindnessGRM6 proteinnarrative analysisperceptionpsychophysicsquality of life.OphthalmologyRE1-994ENClinical Ophthalmology, Vol Volume 10, Pp 1593-1606 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Congenital Stationary Night Blindness GRM6 protein narrative analysis perception psychophysics quality of life. Ophthalmology RE1-994
spellingShingle	Congenital Stationary Night Blindness GRM6 protein narrative analysis perception psychophysics quality of life. Ophthalmology RE1-994 Cammack J Whight J Cross V Rider AT Webster AR Stockman A Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
description	Jocelyn Cammack,1 John Whight,2 Vinette Cross,3 Andrew T Rider,1 Andrew R Webster,1,2 Andrew Stockman1 1Department of Visual Neuroscience, UCL Institute of Ophthalmology, 2Moorfields Eye Hospital, London, 3Centre for Health and Social Care Improvement, University of Wolverhampton, Wolverhampton, UK Abstract: An appreciation of the relation between laboratory measures of visual deficit and everyday perceptual experience is fundamental to understanding the impact of a visual condition on patients and so to a fuller characterization of the disorder. This study aims to understand better the interpretative processes by which modified sensory information is perceived by a patient with congenital stationary night blindness and the adaptive strategies that are devised to deal with their measurable visual loss. Psychophysical measurements of temporal resolution, spectral sensitivity, and color discrimination were conducted on a 78-year-old male patient with the condition, who was also interviewed at length about the ways in which his diagnosis affected his daily life. Narrative analysis was employed to identify the relation between his subjective perceptual experiences and functional deficits in identifiable components of the visual system. Psychophysical measurements indicated a complete lack of rod perception and substantially reduced cone sensitivity. Two particular effects of this visual loss emerged during interviews: 1) the development of navigational techniques that relied on light reflections and point sources of light and 2) a reluctance to disclose the extent of visual loss and resulting lifelong psychosocial consequences. This study demonstrates the valuable complementary role that rich descriptive patient testimony can play, in conjunction with laboratory and clinical measurements, in more fully characterizing a disorder and in reaching a more complete understanding of the experience of vision loss. It also evidences the particular suitability of filmmaking techniques as a means of accessing and communicating subjective patient experience. Keywords: congenital stationary night blindness, GRM6 gene, narrative analysis, perception, psychophysics, quality of life
format	article
author	Cammack J Whight J Cross V Rider AT Webster AR Stockman A
author_facet	Cammack J Whight J Cross V Rider AT Webster AR Stockman A
author_sort	Cammack J
title	Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
title_short	Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
title_full	Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
title_fullStr	Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
title_full_unstemmed	Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
title_sort	psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness
publisher	Dove Medical Press
publishDate	2016
url	https://doaj.org/article/865b09938b3e4ff8a01727ce3b39fb5a
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_version_	1718399166794694656

Psychophysical measures of visual function and everyday perceptual experience in a case of congenital stationary night blindness

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