Upper eyelid contour symmetry measurement with Bézier curves
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Arquivos brasileiros de oftalmologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492020000100006 |
Resumo: | ABSTRACT Purpose: The purpose of the present work is to measure the interocular upper lid contour symmetry using a new method of lid contour quantification. Methods: The Bézier curve tool of the Image J software was used to extract the right and left upper eyelid contours of 75 normal subjects. Inter-observer variability of 29 right lid contours obtained by two independent observers was estimated using the coefficient of overlap of two curves and an analysis of the differences of the contour peak location. A two-way analysis of variance was used to test the mean value of the coefficient of overlap of the right and left contours in males and females and lid segments. The same analysis was performed to compare the location of the contour peak of the right and left contours. Results: The coefficient of contour overlap obtained by independent observers ranged from 93.5% to 98.8%, with a mean of 96.1% ± 1.6 SD. There was a mean difference of 0.02 mm in the location of the contour peak. Right and left contour symmetry did not differ between females and males and was within the range of the method variability for contour overlap and location of the contour peak. Conclusions: The upper eyelid contour is highly symmetrical. Bézier lines allow a quick and fast quantification of the lid contour, with a mean inter-observer variability of 3.9%. |
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Arquivos brasileiros de oftalmologia (Online) |
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Upper eyelid contour symmetry measurement with Bézier curvesEyelids/anatomy & histologyBézier curveFacial asymmetry/diagnosisReference valuesImage processing, com puter-assistedABSTRACT Purpose: The purpose of the present work is to measure the interocular upper lid contour symmetry using a new method of lid contour quantification. Methods: The Bézier curve tool of the Image J software was used to extract the right and left upper eyelid contours of 75 normal subjects. Inter-observer variability of 29 right lid contours obtained by two independent observers was estimated using the coefficient of overlap of two curves and an analysis of the differences of the contour peak location. A two-way analysis of variance was used to test the mean value of the coefficient of overlap of the right and left contours in males and females and lid segments. The same analysis was performed to compare the location of the contour peak of the right and left contours. Results: The coefficient of contour overlap obtained by independent observers ranged from 93.5% to 98.8%, with a mean of 96.1% ± 1.6 SD. There was a mean difference of 0.02 mm in the location of the contour peak. Right and left contour symmetry did not differ between females and males and was within the range of the method variability for contour overlap and location of the contour peak. Conclusions: The upper eyelid contour is highly symmetrical. Bézier lines allow a quick and fast quantification of the lid contour, with a mean inter-observer variability of 3.9%.Conselho Brasileiro de Oftalmologia2020-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492020000100006Arquivos Brasileiros de Oftalmologia v.83 n.1 2020reponame:Arquivos brasileiros de oftalmologia (Online)instname:Conselho Brasileiro de Oftalmologia (CBO)instacron:CBO10.5935/0004-2749.20200002info:eu-repo/semantics/openAccessGolbert,Marcelo BlochteinGarcia,Denny MarcosAkaishi,Patrícia Mitiki SantelloCruz,Antonio Augusto Velasco eeng2020-02-21T00:00:00Zoai:scielo:S0004-27492020000100006Revistahttp://aboonline.org.br/https://old.scielo.br/oai/scielo-oai.phpaboonline@cbo.com.br||abo@cbo.com.br1678-29250004-2749opendoar:2020-02-21T00:00Arquivos brasileiros de oftalmologia (Online) - Conselho Brasileiro de Oftalmologia (CBO)false |
dc.title.none.fl_str_mv |
Upper eyelid contour symmetry measurement with Bézier curves |
title |
Upper eyelid contour symmetry measurement with Bézier curves |
spellingShingle |
Upper eyelid contour symmetry measurement with Bézier curves Golbert,Marcelo Blochtein Eyelids/anatomy & histology Bézier curve Facial asymmetry/diagnosis Reference values Image processing, com puter-assisted |
title_short |
Upper eyelid contour symmetry measurement with Bézier curves |
title_full |
Upper eyelid contour symmetry measurement with Bézier curves |
title_fullStr |
Upper eyelid contour symmetry measurement with Bézier curves |
title_full_unstemmed |
Upper eyelid contour symmetry measurement with Bézier curves |
title_sort |
Upper eyelid contour symmetry measurement with Bézier curves |
author |
Golbert,Marcelo Blochtein |
author_facet |
Golbert,Marcelo Blochtein Garcia,Denny Marcos Akaishi,Patrícia Mitiki Santello Cruz,Antonio Augusto Velasco e |
author_role |
author |
author2 |
Garcia,Denny Marcos Akaishi,Patrícia Mitiki Santello Cruz,Antonio Augusto Velasco e |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Golbert,Marcelo Blochtein Garcia,Denny Marcos Akaishi,Patrícia Mitiki Santello Cruz,Antonio Augusto Velasco e |
dc.subject.por.fl_str_mv |
Eyelids/anatomy & histology Bézier curve Facial asymmetry/diagnosis Reference values Image processing, com puter-assisted |
topic |
Eyelids/anatomy & histology Bézier curve Facial asymmetry/diagnosis Reference values Image processing, com puter-assisted |
description |
ABSTRACT Purpose: The purpose of the present work is to measure the interocular upper lid contour symmetry using a new method of lid contour quantification. Methods: The Bézier curve tool of the Image J software was used to extract the right and left upper eyelid contours of 75 normal subjects. Inter-observer variability of 29 right lid contours obtained by two independent observers was estimated using the coefficient of overlap of two curves and an analysis of the differences of the contour peak location. A two-way analysis of variance was used to test the mean value of the coefficient of overlap of the right and left contours in males and females and lid segments. The same analysis was performed to compare the location of the contour peak of the right and left contours. Results: The coefficient of contour overlap obtained by independent observers ranged from 93.5% to 98.8%, with a mean of 96.1% ± 1.6 SD. There was a mean difference of 0.02 mm in the location of the contour peak. Right and left contour symmetry did not differ between females and males and was within the range of the method variability for contour overlap and location of the contour peak. Conclusions: The upper eyelid contour is highly symmetrical. Bézier lines allow a quick and fast quantification of the lid contour, with a mean inter-observer variability of 3.9%. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492020000100006 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492020000100006 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0004-2749.20200002 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Conselho Brasileiro de Oftalmologia |
publisher.none.fl_str_mv |
Conselho Brasileiro de Oftalmologia |
dc.source.none.fl_str_mv |
Arquivos Brasileiros de Oftalmologia v.83 n.1 2020 reponame:Arquivos brasileiros de oftalmologia (Online) instname:Conselho Brasileiro de Oftalmologia (CBO) instacron:CBO |
instname_str |
Conselho Brasileiro de Oftalmologia (CBO) |
instacron_str |
CBO |
institution |
CBO |
reponame_str |
Arquivos brasileiros de oftalmologia (Online) |
collection |
Arquivos brasileiros de oftalmologia (Online) |
repository.name.fl_str_mv |
Arquivos brasileiros de oftalmologia (Online) - Conselho Brasileiro de Oftalmologia (CBO) |
repository.mail.fl_str_mv |
aboonline@cbo.com.br||abo@cbo.com.br |
_version_ |
1754209030456213504 |