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Convergence and divergence to radial optic flow in infancy

Research finds a relationship between the development of depth perception and ocular motion functions including smooth pursuit and ocular following response. Infants' reactions to looming stimuli also suggest sensitivity to optic flow information that specifies relative distance. With radial op...

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Detalles Bibliográficos
Autores principales: Nawrot, Elizabeth, Nawrot, Mark
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Association for Research in Vision and Ophthalmology 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996593/
https://www.ncbi.nlm.nih.gov/pubmed/31722006
http://dx.doi.org/10.1167/19.13.6
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author Nawrot, Elizabeth
Nawrot, Mark
author_facet Nawrot, Elizabeth
Nawrot, Mark
author_sort Nawrot, Elizabeth
collection PubMed
description Research finds a relationship between the development of depth perception and ocular motion functions including smooth pursuit and ocular following response. Infants' reactions to looming stimuli also suggest sensitivity to optic flow information that specifies relative distance. With radial optic flow, an expanding flow field elicits involuntary convergent eye movements while a contracting one elicits involuntary divergent eye movements. This response suggests the visual system is interpreting the radial flow as a change in relative depth. We measured the oculomotor response to radial optic flow in infants aged two to five months. The stimulus comprised a radial optic flow pattern that expanded or contracted across eight 400 ms trials while eye position was monitored with a Tobii X120 eye tracker. A subset of infants also viewed trials of a static version of the stimulus. On average, most infants in each age group demonstrated convergence to the expanding pattern and divergence to the contracting one. Moreover, the difference in gain between the convergence and divergence eye movements was significant. The presence of correct-direction vergence eye movements in response to expansion and contraction provides further evidence that infants are sensitive to information that specifies relative motion in depth.
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spelling pubmed-69965932020-02-10 Convergence and divergence to radial optic flow in infancy Nawrot, Elizabeth Nawrot, Mark J Vis Article Research finds a relationship between the development of depth perception and ocular motion functions including smooth pursuit and ocular following response. Infants' reactions to looming stimuli also suggest sensitivity to optic flow information that specifies relative distance. With radial optic flow, an expanding flow field elicits involuntary convergent eye movements while a contracting one elicits involuntary divergent eye movements. This response suggests the visual system is interpreting the radial flow as a change in relative depth. We measured the oculomotor response to radial optic flow in infants aged two to five months. The stimulus comprised a radial optic flow pattern that expanded or contracted across eight 400 ms trials while eye position was monitored with a Tobii X120 eye tracker. A subset of infants also viewed trials of a static version of the stimulus. On average, most infants in each age group demonstrated convergence to the expanding pattern and divergence to the contracting one. Moreover, the difference in gain between the convergence and divergence eye movements was significant. The presence of correct-direction vergence eye movements in response to expansion and contraction provides further evidence that infants are sensitive to information that specifies relative motion in depth. The Association for Research in Vision and Ophthalmology 2019-11-13 /pmc/articles/PMC6996593/ /pubmed/31722006 http://dx.doi.org/10.1167/19.13.6 Text en Copyright 2019 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
spellingShingle Article
Nawrot, Elizabeth
Nawrot, Mark
Convergence and divergence to radial optic flow in infancy
title Convergence and divergence to radial optic flow in infancy
title_full Convergence and divergence to radial optic flow in infancy
title_fullStr Convergence and divergence to radial optic flow in infancy
title_full_unstemmed Convergence and divergence to radial optic flow in infancy
title_short Convergence and divergence to radial optic flow in infancy
title_sort convergence and divergence to radial optic flow in infancy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996593/
https://www.ncbi.nlm.nih.gov/pubmed/31722006
http://dx.doi.org/10.1167/19.13.6
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