Short-term corneal response to corneal refractive therapy for different refractive targets
Autor(a) principal: | |
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Data de Publicação: | 2009 |
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/1822/66587 |
Resumo: | Purpose: The goal of the present study was to investigate the short-term variations in corneal topography within the first 3 hours of lens wear under open eye conditions, which call be considered an off-label condition in current orthokeratology treatment, and the recovery of the effect during an additional 3-hour period after lens removal.Methods: Fourteen Volunteers were fitted with Paragon CRT reverse geometry rigid gas permeable contact lenses Simulating 2 different refractive targets of -2.00 and -4.00 diopters of myopia correction in the right and left eyes in random order. After the lenses were placed in both eyes. Subsequent measurements of corneal topography were obtained at 30, 60, and 180 minutes: the same measurements were also taken at 30, 60, and 180 minutes after lens removal.Results: Significant flattening of the cornea was evident after 30 minutes of lens wear. Overall, the -4.00 group changes progressed more rapidly than in the -2.00 group, and they also took more time to recover after lens removal. However, for most of the parameters, differences between -2.00 and -4.00 treatments are evident only after 60 minutes of lens wear.Conclusions: Under open eye conditions, the first 30 minutes of corneal refractive therapy are determinant to establish the myopic orthokeratologic effect and changes are almost identical irrespective of the refractive target. After this point, changes are different depending on the refractive target. The recovery was almost as fast as the onset of the orthokeratologic effect, demonstrating that the cornea deforms quickly beneath these lenses and does recover safely and quickly once the lenses are removed. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Short-term corneal response to corneal refractive therapy for different refractive targetscorneal refractive therapycorneal topographyorthokeratologyshort-term effectmyopia correctionrefractive targetScience & TechnologyPurpose: The goal of the present study was to investigate the short-term variations in corneal topography within the first 3 hours of lens wear under open eye conditions, which call be considered an off-label condition in current orthokeratology treatment, and the recovery of the effect during an additional 3-hour period after lens removal.Methods: Fourteen Volunteers were fitted with Paragon CRT reverse geometry rigid gas permeable contact lenses Simulating 2 different refractive targets of -2.00 and -4.00 diopters of myopia correction in the right and left eyes in random order. After the lenses were placed in both eyes. Subsequent measurements of corneal topography were obtained at 30, 60, and 180 minutes: the same measurements were also taken at 30, 60, and 180 minutes after lens removal.Results: Significant flattening of the cornea was evident after 30 minutes of lens wear. Overall, the -4.00 group changes progressed more rapidly than in the -2.00 group, and they also took more time to recover after lens removal. However, for most of the parameters, differences between -2.00 and -4.00 treatments are evident only after 60 minutes of lens wear.Conclusions: Under open eye conditions, the first 30 minutes of corneal refractive therapy are determinant to establish the myopic orthokeratologic effect and changes are almost identical irrespective of the refractive target. After this point, changes are different depending on the refractive target. The recovery was almost as fast as the onset of the orthokeratologic effect, demonstrating that the cornea deforms quickly beneath these lenses and does recover safely and quickly once the lenses are removed.Supported in part by a grant from the Science and Technology Foundation, Ministry of Science and Superior Education, and European Social Fund under contract 8281/2002 granted to J.M.G.-M.Lippincott, Williams & WilkinsUniversidade do MinhoVilla-Collar, CesarGonzález-Méijome, José ManuelQueirós, A.Jorge, Jorge20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/66587eng0277-374010.1097/ICO.0b013e31818a7d8019387233https://journals.lww.com/corneajrnl/Abstract/2009/04000/Short_Term_Corneal_Response_to_Corneal_Refractive.11.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:RCAAP2023-07-21T12:46:10ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Short-term corneal response to corneal refractive therapy for different refractive targets |
title |
Short-term corneal response to corneal refractive therapy for different refractive targets |
spellingShingle |
Short-term corneal response to corneal refractive therapy for different refractive targets Villa-Collar, Cesar corneal refractive therapy corneal topography orthokeratology short-term effect myopia correction refractive target Science & Technology |
title_short |
Short-term corneal response to corneal refractive therapy for different refractive targets |
title_full |
Short-term corneal response to corneal refractive therapy for different refractive targets |
title_fullStr |
Short-term corneal response to corneal refractive therapy for different refractive targets |
title_full_unstemmed |
Short-term corneal response to corneal refractive therapy for different refractive targets |
title_sort |
Short-term corneal response to corneal refractive therapy for different refractive targets |
author |
Villa-Collar, Cesar |
author_facet |
Villa-Collar, Cesar González-Méijome, José Manuel Queirós, A. Jorge, Jorge |
author_role |
author |
author2 |
González-Méijome, José Manuel Queirós, A. Jorge, Jorge |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Villa-Collar, Cesar González-Méijome, José Manuel Queirós, A. Jorge, Jorge |
dc.subject.por.fl_str_mv |
corneal refractive therapy corneal topography orthokeratology short-term effect myopia correction refractive target Science & Technology |
topic |
corneal refractive therapy corneal topography orthokeratology short-term effect myopia correction refractive target Science & Technology |
description |
Purpose: The goal of the present study was to investigate the short-term variations in corneal topography within the first 3 hours of lens wear under open eye conditions, which call be considered an off-label condition in current orthokeratology treatment, and the recovery of the effect during an additional 3-hour period after lens removal.Methods: Fourteen Volunteers were fitted with Paragon CRT reverse geometry rigid gas permeable contact lenses Simulating 2 different refractive targets of -2.00 and -4.00 diopters of myopia correction in the right and left eyes in random order. After the lenses were placed in both eyes. Subsequent measurements of corneal topography were obtained at 30, 60, and 180 minutes: the same measurements were also taken at 30, 60, and 180 minutes after lens removal.Results: Significant flattening of the cornea was evident after 30 minutes of lens wear. Overall, the -4.00 group changes progressed more rapidly than in the -2.00 group, and they also took more time to recover after lens removal. However, for most of the parameters, differences between -2.00 and -4.00 treatments are evident only after 60 minutes of lens wear.Conclusions: Under open eye conditions, the first 30 minutes of corneal refractive therapy are determinant to establish the myopic orthokeratologic effect and changes are almost identical irrespective of the refractive target. After this point, changes are different depending on the refractive target. The recovery was almost as fast as the onset of the orthokeratologic effect, demonstrating that the cornea deforms quickly beneath these lenses and does recover safely and quickly once the lenses are removed. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009 2009-01-01T00:00:00Z |
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/1822/66587 |
url |
http://hdl.handle.net/1822/66587 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0277-3740 10.1097/ICO.0b013e31818a7d80 19387233 https://journals.lww.com/corneajrnl/Abstract/2009/04000/Short_Term_Corneal_Response_to_Corneal_Refractive.11.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 |
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 |
|
repository.mail.fl_str_mv |
|
_version_ |
1777303839188189184 |