Peripheral refraction in myopic patients after Orthokeratology
Autor(a) principal: | |
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Data de Publicação: | 2010 |
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/1822/11704 |
Resumo: | Purpose: The purpose of this study was to characterize the central and peripheral refraction across the horizontal meridian of the visual field before and after myopic corneal refractive therapy (CRT) with contact lenses. Methods: Twenty-eight right eyes (mean age±SD = 24.6±6.3 years) were fitted with Paragon CRT contact lenses to treat myopia between -0.88 and -5.25D of spherical equivalent. Along with a complete set of examination procedures to assess suitability for treatment, the central and peripheral refraction was measured along the horizontal meridian up to 35º of eccentricity in the nasal and temporal retinal area in 5º steps. Results: Baseline central average spherical equivalent (M) measured by subjective refraction changed from -1.95±1.27D to -0.38±0.67D. Changes in M component ranged between 1.42±0.89D at center to 0.43±0.88D at 20º in the temporal retina (p<0.002). At 25º to both sides of the central refraction measurement, peripheral refraction after treatment was not statistically different from baseline values (p>0.351). Beyond the 25º limit, M component changed in the myopic direction up to -1.11±0.88D at 35º in temporal retina (p<0.001). Treatment induced was symmetric between nasal and temporal visual field along the horizontal meridian (p>0.05 for all eccentricities). Furthermore, the degree of myopic increase in spherical equivalent for 30º (r2=0.573, p<0.001) and 35º (r2=0.645, p<0.001) eccentric refraction was highly correlated with axial spherical equivalent at baseline. Conclusions: CRT inverts the pattern of peripheral refraction in spherical equivalent refraction creating a treatment area of myopic reduction within the central 25º of visual field, and a myopic shift beyond the 25º. In peripheral refraction for 30º and 35º, the amount of myopia induced in terms of spherical equivalent has an almost 1:1 relationship with the amount of baseline spherical equivalent refraction to be corrected. |
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Peripheral refraction in myopic patients after OrthokeratologyPeripheral refractionMyopia progressionCorneal refractive therapyOrthokeratologyScience & TechnologyPurpose: The purpose of this study was to characterize the central and peripheral refraction across the horizontal meridian of the visual field before and after myopic corneal refractive therapy (CRT) with contact lenses. Methods: Twenty-eight right eyes (mean age±SD = 24.6±6.3 years) were fitted with Paragon CRT contact lenses to treat myopia between -0.88 and -5.25D of spherical equivalent. Along with a complete set of examination procedures to assess suitability for treatment, the central and peripheral refraction was measured along the horizontal meridian up to 35º of eccentricity in the nasal and temporal retinal area in 5º steps. Results: Baseline central average spherical equivalent (M) measured by subjective refraction changed from -1.95±1.27D to -0.38±0.67D. Changes in M component ranged between 1.42±0.89D at center to 0.43±0.88D at 20º in the temporal retina (p<0.002). At 25º to both sides of the central refraction measurement, peripheral refraction after treatment was not statistically different from baseline values (p>0.351). Beyond the 25º limit, M component changed in the myopic direction up to -1.11±0.88D at 35º in temporal retina (p<0.001). Treatment induced was symmetric between nasal and temporal visual field along the horizontal meridian (p>0.05 for all eccentricities). Furthermore, the degree of myopic increase in spherical equivalent for 30º (r2=0.573, p<0.001) and 35º (r2=0.645, p<0.001) eccentric refraction was highly correlated with axial spherical equivalent at baseline. Conclusions: CRT inverts the pattern of peripheral refraction in spherical equivalent refraction creating a treatment area of myopic reduction within the central 25º of visual field, and a myopic shift beyond the 25º. In peripheral refraction for 30º and 35º, the amount of myopia induced in terms of spherical equivalent has an almost 1:1 relationship with the amount of baseline spherical equivalent refraction to be corrected.Objectivo: O objectivo deste estudo foi caracterizar a refracção central e periférica através do meridiano horizontal do campo visual, antes e depois da Terapia Refractiva Corneal à miopia (CRT) com lentes de contacto. Métodos: Foram adaptados com lentes de contacto Paragon CRT vinte e oito olhos direitos de 28 indivíduos (com uma idade média ± DP = 24,6 ± 6,3 anos) para corrigir miopia entre – 0.88 e – 5.25 D de equivalente esférico. Juntamente com um conjunto completo de exames para avaliar a possibilidade de tratamento, foi medida a refracção central e periférica ao longo do meridiano horizontal até aos 35º de excentricidade na área da retina nasal e temporal em intervalos de 5º. Resultados: A média do equivalente esférico central no estado inicial (M) medido pela refracção subjectiva mudou de - 1,95 ± 1,27 D para - 0,38 ± 0,67 D. As alterações no componente M variaram entre +1,42 ± 0,89 D no centro e +0,43 ± 0,88 D a 20º na retina temporal (p < 0,002). A refracção periférica após o tratamento não foi estatisticamente diferente dos valores do estado inicial (p > 0,351), a 25º para ambos os lados da medida da refracção central. Para além do limite de 25º, o componente M mudou no sentido da miopia até – 1,11 ± 0,88 D a 35º na retina temporal (p < 0,001). O tratamento induzido foi simétrico entre o campo visual nasal e temporal ao longo do meridiano horizontal (p > 0,050 para todas as excentricidades). Além disso, o aumento do valor de miopia em equivalente esférico para 30º (r2 = 0,573, p < 0,001) e 35º (r2 = 0,645, p < 0,001) de refracção excêntrica foi altamente correlacionado com o equivalente esférico do estado inicial. Conclusões: As lentes CRT invertem o padrão da refracção periférica no equivalente esférico da refracção, criando uma área de tratamento na redução da miopia dentro de 25º do campo visual central, e um deslocamento miópico para além de 25º. Na refracção periférica para 30º e 35º, o valor da miopia induzida em termos de equivalente esférico, tem uma relação de quase 1:1 com o valor da refracção do equivalente esférico do estado inicial a ser corrigido.Ministério da Ciência e do Ensino SuperiorFundação para a Ciência e a Tecnologia (FCT) - Bolsa SFRH/BD/61768/2009Lippincott, Williams & WilkinsUniversidade do MinhoQueirós, A.González-Méijome, José ManuelJorge, JorgeVilla-Collar, CésarGutiérrez, Ángel Ramón2010-052010-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/11704eng"Optometry and Vision Science." ISSN 1040-5488. 87:5 (Maio 2010) 323-329.1040-548810.1097/OPX.0b013e3181d951f720375751http://journals.lww.com/optvissci/pages/default.aspxinfo: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:RCAAP2023-07-21T12:42:55Zoai:repositorium.sdum.uminho.pt:1822/11704Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:40:16.635980Repositório 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 |
Peripheral refraction in myopic patients after Orthokeratology |
title |
Peripheral refraction in myopic patients after Orthokeratology |
spellingShingle |
Peripheral refraction in myopic patients after Orthokeratology Queirós, A. Peripheral refraction Myopia progression Corneal refractive therapy Orthokeratology Science & Technology |
title_short |
Peripheral refraction in myopic patients after Orthokeratology |
title_full |
Peripheral refraction in myopic patients after Orthokeratology |
title_fullStr |
Peripheral refraction in myopic patients after Orthokeratology |
title_full_unstemmed |
Peripheral refraction in myopic patients after Orthokeratology |
title_sort |
Peripheral refraction in myopic patients after Orthokeratology |
author |
Queirós, A. |
author_facet |
Queirós, A. González-Méijome, José Manuel Jorge, Jorge Villa-Collar, César Gutiérrez, Ángel Ramón |
author_role |
author |
author2 |
González-Méijome, José Manuel Jorge, Jorge Villa-Collar, César Gutiérrez, Ángel Ramón |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Queirós, A. González-Méijome, José Manuel Jorge, Jorge Villa-Collar, César Gutiérrez, Ángel Ramón |
dc.subject.por.fl_str_mv |
Peripheral refraction Myopia progression Corneal refractive therapy Orthokeratology Science & Technology |
topic |
Peripheral refraction Myopia progression Corneal refractive therapy Orthokeratology Science & Technology |
description |
Purpose: The purpose of this study was to characterize the central and peripheral refraction across the horizontal meridian of the visual field before and after myopic corneal refractive therapy (CRT) with contact lenses. Methods: Twenty-eight right eyes (mean age±SD = 24.6±6.3 years) were fitted with Paragon CRT contact lenses to treat myopia between -0.88 and -5.25D of spherical equivalent. Along with a complete set of examination procedures to assess suitability for treatment, the central and peripheral refraction was measured along the horizontal meridian up to 35º of eccentricity in the nasal and temporal retinal area in 5º steps. Results: Baseline central average spherical equivalent (M) measured by subjective refraction changed from -1.95±1.27D to -0.38±0.67D. Changes in M component ranged between 1.42±0.89D at center to 0.43±0.88D at 20º in the temporal retina (p<0.002). At 25º to both sides of the central refraction measurement, peripheral refraction after treatment was not statistically different from baseline values (p>0.351). Beyond the 25º limit, M component changed in the myopic direction up to -1.11±0.88D at 35º in temporal retina (p<0.001). Treatment induced was symmetric between nasal and temporal visual field along the horizontal meridian (p>0.05 for all eccentricities). Furthermore, the degree of myopic increase in spherical equivalent for 30º (r2=0.573, p<0.001) and 35º (r2=0.645, p<0.001) eccentric refraction was highly correlated with axial spherical equivalent at baseline. Conclusions: CRT inverts the pattern of peripheral refraction in spherical equivalent refraction creating a treatment area of myopic reduction within the central 25º of visual field, and a myopic shift beyond the 25º. In peripheral refraction for 30º and 35º, the amount of myopia induced in terms of spherical equivalent has an almost 1:1 relationship with the amount of baseline spherical equivalent refraction to be corrected. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-05 2010-05-01T00:00:00Z |
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/1822/11704 |
url |
http://hdl.handle.net/1822/11704 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Optometry and Vision Science." ISSN 1040-5488. 87:5 (Maio 2010) 323-329. 1040-5488 10.1097/OPX.0b013e3181d951f7 20375751 http://journals.lww.com/optvissci/pages/default.aspx |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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