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Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search
Natural vision involves sequential eye movements that bring the fovea to locations selected by peripheral vision. How peripheral visual field loss (PVFL) affects this process is not well understood. We examine how the location and extent of PVFL affects eye movement behavior in a naturalistic visual...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3498877/ https://www.ncbi.nlm.nih.gov/pubmed/23162511 http://dx.doi.org/10.3389/fpsyg.2012.00472 |
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author | Wiecek, Emily Pasquale, Louis R. Fiser, Jozsef Dakin, Steven Bex, Peter J. |
author_facet | Wiecek, Emily Pasquale, Louis R. Fiser, Jozsef Dakin, Steven Bex, Peter J. |
author_sort | Wiecek, Emily |
collection | PubMed |
description | Natural vision involves sequential eye movements that bring the fovea to locations selected by peripheral vision. How peripheral visual field loss (PVFL) affects this process is not well understood. We examine how the location and extent of PVFL affects eye movement behavior in a naturalistic visual search task. Ten patients with PVFL and 13 normally sighted subjects with full visual fields (FVF) completed 30 visual searches monocularly. Subjects located a 4° × 4° target, pseudo-randomly selected within a 26° × 11° natural image. Eye positions were recorded at 50 Hz. Search duration, fixation duration, saccade size, and number of saccades per trial were not significantly different between PVFL and FVF groups (p > 0.1). A χ(2) test showed that the distributions of saccade directions for PVFL and FVL subjects were significantly different in 8 out of 10 cases (p < 0.01). Humphrey Visual Field pattern deviations for each subject were compared with the spatial distribution of eye movement directions. There were no significant correlations between saccade directional bias and visual field sensitivity across the 10 patients. Visual search performance was not significantly affected by PVFL. An analysis of eye movement directions revealed patients with PVFL show a biased directional distribution that was not directly related to the locus of vision loss, challenging feed-forward models of eye movement control. Consequently, many patients do not optimally compensate for visual field loss during visual search. |
format | Online Article Text |
id | pubmed-3498877 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-34988772012-11-16 Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search Wiecek, Emily Pasquale, Louis R. Fiser, Jozsef Dakin, Steven Bex, Peter J. Front Psychol Psychology Natural vision involves sequential eye movements that bring the fovea to locations selected by peripheral vision. How peripheral visual field loss (PVFL) affects this process is not well understood. We examine how the location and extent of PVFL affects eye movement behavior in a naturalistic visual search task. Ten patients with PVFL and 13 normally sighted subjects with full visual fields (FVF) completed 30 visual searches monocularly. Subjects located a 4° × 4° target, pseudo-randomly selected within a 26° × 11° natural image. Eye positions were recorded at 50 Hz. Search duration, fixation duration, saccade size, and number of saccades per trial were not significantly different between PVFL and FVF groups (p > 0.1). A χ(2) test showed that the distributions of saccade directions for PVFL and FVL subjects were significantly different in 8 out of 10 cases (p < 0.01). Humphrey Visual Field pattern deviations for each subject were compared with the spatial distribution of eye movement directions. There were no significant correlations between saccade directional bias and visual field sensitivity across the 10 patients. Visual search performance was not significantly affected by PVFL. An analysis of eye movement directions revealed patients with PVFL show a biased directional distribution that was not directly related to the locus of vision loss, challenging feed-forward models of eye movement control. Consequently, many patients do not optimally compensate for visual field loss during visual search. Frontiers Media S.A. 2012-11-05 /pmc/articles/PMC3498877/ /pubmed/23162511 http://dx.doi.org/10.3389/fpsyg.2012.00472 Text en Copyright © 2012 Wiecek, Pasquale, Fiser, Dakin and Bex. http://www.frontiersin.org/licenseagreement This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. |
spellingShingle | Psychology Wiecek, Emily Pasquale, Louis R. Fiser, Jozsef Dakin, Steven Bex, Peter J. Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search |
title | Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search |
title_full | Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search |
title_fullStr | Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search |
title_full_unstemmed | Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search |
title_short | Effects of Peripheral Visual Field Loss on Eye Movements During Visual Search |
title_sort | effects of peripheral visual field loss on eye movements during visual search |
topic | Psychology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3498877/ https://www.ncbi.nlm.nih.gov/pubmed/23162511 http://dx.doi.org/10.3389/fpsyg.2012.00472 |
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