Visual suppression in intermittent exotropia during binocular alignment.

PURPOSE To investigate the cortical mechanisms that prevent diplopia in intermittent exotropia (X(T)) during binocular alignment (orthotropia). METHODS The authors studied 12 X(T) patients aged 5 to 22 years. Seventy-five percent had functional stereo vision with stereoacuity similar to that of 12 a...

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Detalles Bibliográficos
Autores: Serrano Pedraza, Ignacio, Manjunath, Vina, Osunkunle, Olaoluwakitan, Clarke, Michael P, Read, Jenny C A
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/44954
Acceso en línea:https://hdl.handle.net/20.500.14352/44954
Access Level:acceso abierto
Palabra clave:159.9.07
159.93
535
Child
diplopia
Face
Perception
Eye
Nose
Niño
Miopía
Cara
Percepción visual
Ojo
Nariz
Psicología experimental
Percepción
Óptica oftálmica
6106 Psicología Experimental
6106.09 Procesos de Percepción
id ES_f348a6ae0197ff84eea615b4103abcf5
oai_identifier_str oai:docta.ucm.es:20.500.14352/44954
network_acronym_str ES
network_name_str España
repository_id_str
spelling Visual suppression in intermittent exotropia during binocular alignment.Serrano Pedraza, IgnacioManjunath, VinaOsunkunle, OlaoluwakitanClarke, Michael PRead, Jenny C A159.9.07159.93535ChilddiplopiaFacePerceptionEyeNoseNiñoMiopíaCaraPercepción visualOjoNarizPsicología experimentalPercepciónÓptica oftálmica6106 Psicología Experimental6106.09 Procesos de PercepciónPURPOSE To investigate the cortical mechanisms that prevent diplopia in intermittent exotropia (X(T)) during binocular alignment (orthotropia). METHODS The authors studied 12 X(T) patients aged 5 to 22 years. Seventy-five percent had functional stereo vision with stereoacuity similar to that of 12 age-matched controls (0.2-3.7 min arc). Identical face images were presented to the two eyes for 400 ms. In one eye, the face was presented at the fovea; in the other, offset along the horizontal axis with up to 12° eccentricity. The task was to indicate whether one or two faces were perceived. RESULTS All X(T) patients showed normal diplopia when the nonfoveal face was presented to nasal hemiretina, though with a slightly larger fusional range than age-matched controls. However, 10 of 12 patients never experienced diplopia when the nonfoveal face was presented to temporal hemiretina (i.e., when the stimulus simulated exodeviation). Patients showed considerable variability when the single image was perceived. Some patients suppressed the temporal stimulus regardless of which eye viewed it, whereas others suppressed a particular eye even when it viewed the foveal stimulus. In two patients, the simulated exodeviation might have triggered a shift from normal to anomalous retinal correspondence. CONCLUSIONS Antidiplopic mechanisms in X(T) can be reliably triggered by purely retinal information during orthotropia, but the nature of these mechanisms varies between patients.Universidad Complutense de Madrid20112011-04-0120112011-04-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/44954reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial 3.0 Españahttps://creativecommons.org/licenses/by-nc/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/449542026-06-02T12:44:21Z
dc.title.none.fl_str_mv Visual suppression in intermittent exotropia during binocular alignment.
title Visual suppression in intermittent exotropia during binocular alignment.
spellingShingle Visual suppression in intermittent exotropia during binocular alignment.
Serrano Pedraza, Ignacio
159.9.07
159.93
535
Child
diplopia
Face
Perception
Eye
Nose
Niño
Miopía
Cara
Percepción visual
Ojo
Nariz
Psicología experimental
Percepción
Óptica oftálmica
6106 Psicología Experimental
6106.09 Procesos de Percepción
title_short Visual suppression in intermittent exotropia during binocular alignment.
title_full Visual suppression in intermittent exotropia during binocular alignment.
title_fullStr Visual suppression in intermittent exotropia during binocular alignment.
title_full_unstemmed Visual suppression in intermittent exotropia during binocular alignment.
title_sort Visual suppression in intermittent exotropia during binocular alignment.
dc.creator.none.fl_str_mv Serrano Pedraza, Ignacio
Manjunath, Vina
Osunkunle, Olaoluwakitan
Clarke, Michael P
Read, Jenny C A
author Serrano Pedraza, Ignacio
author_facet Serrano Pedraza, Ignacio
Manjunath, Vina
Osunkunle, Olaoluwakitan
Clarke, Michael P
Read, Jenny C A
author_role author
author2 Manjunath, Vina
Osunkunle, Olaoluwakitan
Clarke, Michael P
Read, Jenny C A
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 159.9.07
159.93
535
Child
diplopia
Face
Perception
Eye
Nose
Niño
Miopía
Cara
Percepción visual
Ojo
Nariz
Psicología experimental
Percepción
Óptica oftálmica
6106 Psicología Experimental
6106.09 Procesos de Percepción
topic 159.9.07
159.93
535
Child
diplopia
Face
Perception
Eye
Nose
Niño
Miopía
Cara
Percepción visual
Ojo
Nariz
Psicología experimental
Percepción
Óptica oftálmica
6106 Psicología Experimental
6106.09 Procesos de Percepción
description PURPOSE To investigate the cortical mechanisms that prevent diplopia in intermittent exotropia (X(T)) during binocular alignment (orthotropia). METHODS The authors studied 12 X(T) patients aged 5 to 22 years. Seventy-five percent had functional stereo vision with stereoacuity similar to that of 12 age-matched controls (0.2-3.7 min arc). Identical face images were presented to the two eyes for 400 ms. In one eye, the face was presented at the fovea; in the other, offset along the horizontal axis with up to 12° eccentricity. The task was to indicate whether one or two faces were perceived. RESULTS All X(T) patients showed normal diplopia when the nonfoveal face was presented to nasal hemiretina, though with a slightly larger fusional range than age-matched controls. However, 10 of 12 patients never experienced diplopia when the nonfoveal face was presented to temporal hemiretina (i.e., when the stimulus simulated exodeviation). Patients showed considerable variability when the single image was perceived. Some patients suppressed the temporal stimulus regardless of which eye viewed it, whereas others suppressed a particular eye even when it viewed the foveal stimulus. In two patients, the simulated exodeviation might have triggered a shift from normal to anomalous retinal correspondence. CONCLUSIONS Antidiplopic mechanisms in X(T) can be reliably triggered by purely retinal information during orthotropia, but the nature of these mechanisms varies between patients.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-04-01
2011
2011-04-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/44954
url https://hdl.handle.net/20.500.14352/44954
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial 3.0 España
https://creativecommons.org/licenses/by-nc/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial 3.0 España
https://creativecommons.org/licenses/by-nc/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301629

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