Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction?
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/5799 |
Resumo: | Purpose: The aim of this study was to estimate the agreement between an autorefractor (Nidek ARK 700A) and retinoscopy with subjective refraction. Methods: Measurements of autorefraction obtained with the ARK700A and retinoscopy were performed on 192 right eyes from 192 healthy young adults and compared with subjective refraction. These measurements were performed without cycloplegia. The age range was 18-34 years, with a mean value of 21.6 years and a standard deviation (SD) of 2.66 years. Results: A comparison of the autorefractor and subjective refraction results shows that; (1) for the mean spherical equivalent (M) the autorefractor yields more negative values (–0.44 ± 0.54 D, p = 0.000); (2) for the Jackson cross-cylinder at axis 0º (J0), the autorefractor yields more positive values than the subjective ones (–0.05 ± 0.13 D, p = 0.000); (3) and for the Jackson cross-cylinder at axis 45º (J45), the autorefractor results are more negative (–0.02 ± 0.09 D, p = 0.019). The differences found for each component M, J0 e J45 are statistically significant. By comparing retinoscopy with the subjective exam, there are no statistically significant differences found for the M component, (–0.02 ± 0.33 D, p = 0.304). For the J0 and J45 components, the differences are statistically significant (–0.07 ± 0.10 D, p = 0.000;–0.01 ± 0.08 D, p = 0.008). Conclusions: the present results confirm that when performed by an experienced clinician, retinoscopy is more accurate than automatic refraction giving a better starting point to non-cycloplegic refraction. |
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spelling |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction?RefractionRefractive errorAccuracyAutomated refractorRetinoscopySubjective refractionOrthogonal functionsAstigmatismScience & TechnologyPurpose: The aim of this study was to estimate the agreement between an autorefractor (Nidek ARK 700A) and retinoscopy with subjective refraction. Methods: Measurements of autorefraction obtained with the ARK700A and retinoscopy were performed on 192 right eyes from 192 healthy young adults and compared with subjective refraction. These measurements were performed without cycloplegia. The age range was 18-34 years, with a mean value of 21.6 years and a standard deviation (SD) of 2.66 years. Results: A comparison of the autorefractor and subjective refraction results shows that; (1) for the mean spherical equivalent (M) the autorefractor yields more negative values (–0.44 ± 0.54 D, p = 0.000); (2) for the Jackson cross-cylinder at axis 0º (J0), the autorefractor yields more positive values than the subjective ones (–0.05 ± 0.13 D, p = 0.000); (3) and for the Jackson cross-cylinder at axis 45º (J45), the autorefractor results are more negative (–0.02 ± 0.09 D, p = 0.019). The differences found for each component M, J0 e J45 are statistically significant. By comparing retinoscopy with the subjective exam, there are no statistically significant differences found for the M component, (–0.02 ± 0.33 D, p = 0.304). For the J0 and J45 components, the differences are statistically significant (–0.07 ± 0.10 D, p = 0.000;–0.01 ± 0.08 D, p = 0.008). Conclusions: the present results confirm that when performed by an experienced clinician, retinoscopy is more accurate than automatic refraction giving a better starting point to non-cycloplegic refraction.Lippincott, Williams & WilkinsUniversidade do MinhoJorge, JorgeAlmeida, José B.Parafita, Manuel A.Queirós, A.2005-012005-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/5799eng"Optometry and vision science". ISSN 1040-5488. 82:1 (Jan. 2005) 64-68.1040-548815630406info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:24:44Zoai:repositorium.sdum.uminho.pt:1822/5799Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:18:49.436291Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
title |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
spellingShingle |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? Jorge, Jorge Refraction Refractive error Accuracy Automated refractor Retinoscopy Subjective refraction Orthogonal functions Astigmatism Science & Technology |
title_short |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
title_full |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
title_fullStr |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
title_full_unstemmed |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
title_sort |
Retinoscopy/autorefraction : which is the best starting point for a noncycloplegic refraction? |
author |
Jorge, Jorge |
author_facet |
Jorge, Jorge Almeida, José B. Parafita, Manuel A. Queirós, A. |
author_role |
author |
author2 |
Almeida, José B. Parafita, Manuel A. Queirós, A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Jorge, Jorge Almeida, José B. Parafita, Manuel A. Queirós, A. |
dc.subject.por.fl_str_mv |
Refraction Refractive error Accuracy Automated refractor Retinoscopy Subjective refraction Orthogonal functions Astigmatism Science & Technology |
topic |
Refraction Refractive error Accuracy Automated refractor Retinoscopy Subjective refraction Orthogonal functions Astigmatism Science & Technology |
description |
Purpose: The aim of this study was to estimate the agreement between an autorefractor (Nidek ARK 700A) and retinoscopy with subjective refraction. Methods: Measurements of autorefraction obtained with the ARK700A and retinoscopy were performed on 192 right eyes from 192 healthy young adults and compared with subjective refraction. These measurements were performed without cycloplegia. The age range was 18-34 years, with a mean value of 21.6 years and a standard deviation (SD) of 2.66 years. Results: A comparison of the autorefractor and subjective refraction results shows that; (1) for the mean spherical equivalent (M) the autorefractor yields more negative values (–0.44 ± 0.54 D, p = 0.000); (2) for the Jackson cross-cylinder at axis 0º (J0), the autorefractor yields more positive values than the subjective ones (–0.05 ± 0.13 D, p = 0.000); (3) and for the Jackson cross-cylinder at axis 45º (J45), the autorefractor results are more negative (–0.02 ± 0.09 D, p = 0.019). The differences found for each component M, J0 e J45 are statistically significant. By comparing retinoscopy with the subjective exam, there are no statistically significant differences found for the M component, (–0.02 ± 0.33 D, p = 0.304). For the J0 and J45 components, the differences are statistically significant (–0.07 ± 0.10 D, p = 0.000;–0.01 ± 0.08 D, p = 0.008). Conclusions: the present results confirm that when performed by an experienced clinician, retinoscopy is more accurate than automatic refraction giving a better starting point to non-cycloplegic refraction. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-01 2005-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/5799 |
url |
http://hdl.handle.net/1822/5799 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Optometry and vision science". ISSN 1040-5488. 82:1 (Jan. 2005) 64-68. 1040-5488 15630406 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Lippincott, Williams & Wilkins |
publisher.none.fl_str_mv |
Lippincott, Williams & Wilkins |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132644863115264 |