Ophthalmological assessment of preschool children: Eye blink and pupillary diameter

Detalhes bibliográficos
Autor(a) principal: Lavezzo, Marcelo Mendes
Data de Publicação: 2012
Outros Autores: Schellini, Silvana Artioli [UNESP]
Tipo de documento: Capítulo de livro
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/232254
Resumo: Introduction: Nevertheless the eyes have a fast development mainly in the early childhood, there are many difficulties in eyes examination, leading to late diagnosis to various conditions. Conventional ophthalmic tests are difficult to implement in preschool children. Digital image processing system might provide important informations about the eyeblink and pupil evaluation. Purpose: To investigate, using a digital image processing system, the eyelid dynamics and the pupillary areas and diameters of normal preschool children. Methods: 50 newborns and 200 preschool children were examined. Images were recorded using a digital camera during three minutes. Complete and incomplete blink rates, opening, closing and complete blink times were calculated. Moreover, pupil diameter and pupil area of the preschool children were evaluated during attentive and spontaneous gaze. Data were expressed in pixels and arithmetic means of each parameter were calculated. Results: The complete eye blink was more common and the blink rate increased with age. The incomplete blink rate was the same for all ages. The eyelid opening and closing times and the complete blink time were similar for both sexes. The closing eyelid time was slower. The mean pupil diameter and area were similar for both eyes, presenting values of 18.5 and 311.7 pixels during attentive and 15.4 and 237.6 pixels during spontaneous gaze, respectively. There were no differences between sexes. However, six-year-old children showed lower pupil diameter and area. Conclusion: The digital image processing system is a very good method to evaluate children and permitted to observe the complete blink rate increases with age. Pupil diameter and area were larger during attention and similar for both eyes. © 2011 by Nova Science Publishers, Inc. All rights reserved.
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spelling Ophthalmological assessment of preschool children: Eye blink and pupillary diameterIntroduction: Nevertheless the eyes have a fast development mainly in the early childhood, there are many difficulties in eyes examination, leading to late diagnosis to various conditions. Conventional ophthalmic tests are difficult to implement in preschool children. Digital image processing system might provide important informations about the eyeblink and pupil evaluation. Purpose: To investigate, using a digital image processing system, the eyelid dynamics and the pupillary areas and diameters of normal preschool children. Methods: 50 newborns and 200 preschool children were examined. Images were recorded using a digital camera during three minutes. Complete and incomplete blink rates, opening, closing and complete blink times were calculated. Moreover, pupil diameter and pupil area of the preschool children were evaluated during attentive and spontaneous gaze. Data were expressed in pixels and arithmetic means of each parameter were calculated. Results: The complete eye blink was more common and the blink rate increased with age. The incomplete blink rate was the same for all ages. The eyelid opening and closing times and the complete blink time were similar for both sexes. The closing eyelid time was slower. The mean pupil diameter and area were similar for both eyes, presenting values of 18.5 and 311.7 pixels during attentive and 15.4 and 237.6 pixels during spontaneous gaze, respectively. There were no differences between sexes. However, six-year-old children showed lower pupil diameter and area. Conclusion: The digital image processing system is a very good method to evaluate children and permitted to observe the complete blink rate increases with age. Pupil diameter and area were larger during attention and similar for both eyes. © 2011 by Nova Science Publishers, Inc. All rights reserved.University of São Paulo Medical School - USP, São PauloBotucatu School of Medicine - UNESP, São PauloBotucatu School of Medicine - UNESP, São PauloUniversidade de São Paulo (USP)Universidade Estadual Paulista (UNESP)Lavezzo, Marcelo MendesSchellini, Silvana Artioli [UNESP]2022-04-29T09:35:24Z2022-04-29T09:35:24Z2012-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/bookPart91-102Preschool Children: Physical Activity, Behavioral Assessment and Developmental Challenges, p. 91-102.http://hdl.handle.net/11449/2322542-s2.0-84896416941Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPreschool Children: Physical Activity, Behavioral Assessment and Developmental Challengesinfo:eu-repo/semantics/openAccess2024-08-16T18:44:45Zoai:repositorio.unesp.br:11449/232254Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-16T18:44:45Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
title Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
spellingShingle Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
Lavezzo, Marcelo Mendes
title_short Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
title_full Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
title_fullStr Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
title_full_unstemmed Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
title_sort Ophthalmological assessment of preschool children: Eye blink and pupillary diameter
author Lavezzo, Marcelo Mendes
author_facet Lavezzo, Marcelo Mendes
Schellini, Silvana Artioli [UNESP]
author_role author
author2 Schellini, Silvana Artioli [UNESP]
author2_role author
dc.contributor.none.fl_str_mv Universidade de São Paulo (USP)
Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Lavezzo, Marcelo Mendes
Schellini, Silvana Artioli [UNESP]
description Introduction: Nevertheless the eyes have a fast development mainly in the early childhood, there are many difficulties in eyes examination, leading to late diagnosis to various conditions. Conventional ophthalmic tests are difficult to implement in preschool children. Digital image processing system might provide important informations about the eyeblink and pupil evaluation. Purpose: To investigate, using a digital image processing system, the eyelid dynamics and the pupillary areas and diameters of normal preschool children. Methods: 50 newborns and 200 preschool children were examined. Images were recorded using a digital camera during three minutes. Complete and incomplete blink rates, opening, closing and complete blink times were calculated. Moreover, pupil diameter and pupil area of the preschool children were evaluated during attentive and spontaneous gaze. Data were expressed in pixels and arithmetic means of each parameter were calculated. Results: The complete eye blink was more common and the blink rate increased with age. The incomplete blink rate was the same for all ages. The eyelid opening and closing times and the complete blink time were similar for both sexes. The closing eyelid time was slower. The mean pupil diameter and area were similar for both eyes, presenting values of 18.5 and 311.7 pixels during attentive and 15.4 and 237.6 pixels during spontaneous gaze, respectively. There were no differences between sexes. However, six-year-old children showed lower pupil diameter and area. Conclusion: The digital image processing system is a very good method to evaluate children and permitted to observe the complete blink rate increases with age. Pupil diameter and area were larger during attention and similar for both eyes. © 2011 by Nova Science Publishers, Inc. All rights reserved.
publishDate 2012
dc.date.none.fl_str_mv 2012-12-01
2022-04-29T09:35:24Z
2022-04-29T09:35:24Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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format bookPart
status_str publishedVersion
dc.identifier.uri.fl_str_mv Preschool Children: Physical Activity, Behavioral Assessment and Developmental Challenges, p. 91-102.
http://hdl.handle.net/11449/232254
2-s2.0-84896416941
identifier_str_mv Preschool Children: Physical Activity, Behavioral Assessment and Developmental Challenges, p. 91-102.
2-s2.0-84896416941
url http://hdl.handle.net/11449/232254
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Preschool Children: Physical Activity, Behavioral Assessment and Developmental Challenges
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 91-102
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
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reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
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