Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery

Detalhes bibliográficos
Autor(a) principal: Queirós, A.
Data de Publicação: 2011
Outros Autores: Villa-Collar, César, Gutiérrez, Ángel Ramón, Jorge, Jorge, Queirós, Maria Sameiro Ribeiro, Matos, Sofia Cláudia Peixoto de, González-Méijome, José Manuel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/17128
Resumo: Purpose: To quantify the changes in the elevation topography of the front and back corneal surfaces after three different refractive treatments for correcting myopia with standard and custom laser in situ keratomileusis (LASIK) and orthokeratology using corneal refractive therapy.Methods: We evaluated 20 eyes undergoing orthokeratology for correction of myopia spherical equivalent (mean +/- SD=-3.41 +/- 0.76 D), 18 eyes undergoing custom LASIK surgery (mean +/- SD=-4.14 +/- 0.89 D), and 23 eyes undergoing standard LASIK (mean +/- SD=23.61 +/- 0.67 D). The values of front and back corneal surfaces were derived by using Pentacam (Oculus, Inc. GmbH, Wetzlar, Germany) before and at least 3 months after each treatment, in the center of the cornea and 4 points to each side of the horizontal meridian at intervals of 1 mm.Results: Corneal elevation data before treatment were not statistically different between patients in either group (P>0.070, for back and front elevation). After treatment, both surgical procedures significantly increased the positive value of the front elevation beyond an area of 6 mm. The opposite trend was found within the central 5 mm of the cornea, presenting a statistically significant decrease in elevation (P<0.001). In the case of orthokeratology, the elevation experienced a minor but a statistically significant reduction in the central region (P<0.001). On the back surface, the elevation did not undergo statistically significant alterations in any of the procedures and none of the items discussed (P>0.285).Conclusions: Differences in front corneal elevation changes between LASIK and orthokeratology reveal a much different mechanism for producing corneal power subtraction. The back corneal surface does not suffer significant changes after surgical and nonsurgical treatments for the correction of myopia.
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spelling Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgeryOrthokeratologyLASIKAnterior corneal elevationPosterior corneal elevationCorneal refractive therapyRefractive surgery LASIKCorneal elevationScience & TechnologyPurpose: To quantify the changes in the elevation topography of the front and back corneal surfaces after three different refractive treatments for correcting myopia with standard and custom laser in situ keratomileusis (LASIK) and orthokeratology using corneal refractive therapy.Methods: We evaluated 20 eyes undergoing orthokeratology for correction of myopia spherical equivalent (mean +/- SD=-3.41 +/- 0.76 D), 18 eyes undergoing custom LASIK surgery (mean +/- SD=-4.14 +/- 0.89 D), and 23 eyes undergoing standard LASIK (mean +/- SD=23.61 +/- 0.67 D). The values of front and back corneal surfaces were derived by using Pentacam (Oculus, Inc. GmbH, Wetzlar, Germany) before and at least 3 months after each treatment, in the center of the cornea and 4 points to each side of the horizontal meridian at intervals of 1 mm.Results: Corneal elevation data before treatment were not statistically different between patients in either group (P>0.070, for back and front elevation). After treatment, both surgical procedures significantly increased the positive value of the front elevation beyond an area of 6 mm. The opposite trend was found within the central 5 mm of the cornea, presenting a statistically significant decrease in elevation (P<0.001). In the case of orthokeratology, the elevation experienced a minor but a statistically significant reduction in the central region (P<0.001). On the back surface, the elevation did not undergo statistically significant alterations in any of the procedures and none of the items discussed (P>0.285).Conclusions: Differences in front corneal elevation changes between LASIK and orthokeratology reveal a much different mechanism for producing corneal power subtraction. The back corneal surface does not suffer significant changes after surgical and nonsurgical treatments for the correction of myopia.Supported by a grant from the Science and Technology Foundation (FCT) of the Ministry of Science and Superior Education (MCES) (European Social Funding). Doctoral Fellowship (AQ) number SFRH/BD/61768/2009.Lippincott, Williams & WilkinsUniversidade do MinhoQueirós, A.Villa-Collar, CésarGutiérrez, Ángel RamónJorge, JorgeQueirós, Maria Sameiro RibeiroMatos, Sofia Cláudia Peixoto deGonzález-Méijome, José Manuel20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/17128eng1542-232110.1097/ICL.0b013e318232e32d21983549http://journals.lww.com/info: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:RCAAP2023-07-21T12:31:11Zoai:repositorium.sdum.uminho.pt:1822/17128Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:26:26.285120Repositório 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 Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
title Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
spellingShingle Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
Queirós, A.
Orthokeratology
LASIK
Anterior corneal elevation
Posterior corneal elevation
Corneal refractive therapy
Refractive surgery LASIK
Corneal elevation
Science & Technology
title_short Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
title_full Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
title_fullStr Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
title_full_unstemmed Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
title_sort Anterior and posterior corneal elevation after orthokeratology and standard and customized LASIK surgery
author Queirós, A.
author_facet Queirós, A.
Villa-Collar, César
Gutiérrez, Ángel Ramón
Jorge, Jorge
Queirós, Maria Sameiro Ribeiro
Matos, Sofia Cláudia Peixoto de
González-Méijome, José Manuel
author_role author
author2 Villa-Collar, César
Gutiérrez, Ángel Ramón
Jorge, Jorge
Queirós, Maria Sameiro Ribeiro
Matos, Sofia Cláudia Peixoto de
González-Méijome, José Manuel
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Queirós, A.
Villa-Collar, César
Gutiérrez, Ángel Ramón
Jorge, Jorge
Queirós, Maria Sameiro Ribeiro
Matos, Sofia Cláudia Peixoto de
González-Méijome, José Manuel
dc.subject.por.fl_str_mv Orthokeratology
LASIK
Anterior corneal elevation
Posterior corneal elevation
Corneal refractive therapy
Refractive surgery LASIK
Corneal elevation
Science & Technology
topic Orthokeratology
LASIK
Anterior corneal elevation
Posterior corneal elevation
Corneal refractive therapy
Refractive surgery LASIK
Corneal elevation
Science & Technology
description Purpose: To quantify the changes in the elevation topography of the front and back corneal surfaces after three different refractive treatments for correcting myopia with standard and custom laser in situ keratomileusis (LASIK) and orthokeratology using corneal refractive therapy.Methods: We evaluated 20 eyes undergoing orthokeratology for correction of myopia spherical equivalent (mean +/- SD=-3.41 +/- 0.76 D), 18 eyes undergoing custom LASIK surgery (mean +/- SD=-4.14 +/- 0.89 D), and 23 eyes undergoing standard LASIK (mean +/- SD=23.61 +/- 0.67 D). The values of front and back corneal surfaces were derived by using Pentacam (Oculus, Inc. GmbH, Wetzlar, Germany) before and at least 3 months after each treatment, in the center of the cornea and 4 points to each side of the horizontal meridian at intervals of 1 mm.Results: Corneal elevation data before treatment were not statistically different between patients in either group (P>0.070, for back and front elevation). After treatment, both surgical procedures significantly increased the positive value of the front elevation beyond an area of 6 mm. The opposite trend was found within the central 5 mm of the cornea, presenting a statistically significant decrease in elevation (P<0.001). In the case of orthokeratology, the elevation experienced a minor but a statistically significant reduction in the central region (P<0.001). On the back surface, the elevation did not undergo statistically significant alterations in any of the procedures and none of the items discussed (P>0.285).Conclusions: Differences in front corneal elevation changes between LASIK and orthokeratology reveal a much different mechanism for producing corneal power subtraction. The back corneal surface does not suffer significant changes after surgical and nonsurgical treatments for the correction of myopia.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/17128
url http://hdl.handle.net/1822/17128
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1542-2321
10.1097/ICL.0b013e318232e32d
21983549
http://journals.lww.com/
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
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