Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs
Autor(a) principal: | |
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Data de Publicação: | 2018 |
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/1822/54720 |
Resumo: | Purpose: To investigate the separated and combined influences of inner zone (IZ) diameter and effective add power of dual-focus contact lenses (CL) in the image quality at distance and near viewing, in a functional accommodating model eye. Methods: Computational wave-optics methods were used to define zonal bifocal pupil functions, representing the optic zones of nine dual-focus centre-distance CLs. The dual-focus pupil functions were defined having IZ diameters of 2.10 mm, 3.36 mm and 4.00 mm, with add powers of 1.5 D, 2.0 D and 2.5 D (dioptres), for each design, that resulted in a ratio of 64%/36% between the distance and treatment zone areas, bounded by a 6 mm entrance pupil. A throughfocus routine was implemented in MATLAB to simulate the changes in image quality, calculated from the Visual Strehl ratio, as the eye with the dual-focus accommodates, from 0 to 3.00 D target vergences. Accommodative responses were defined as the changes in the defocus coefficient, combined with a change in fourth and sixth order spherical aberration, which produced a peak in image quality at each target vergence. Results: Distance viewing image quality was marginally affected by IZ diameter but not by add power. Near image quality obtained when focussing the image formed by the near optics was only higher by a small amount compared to the other two IZ diameters. The mean standard deviation values obtained with the three adds were 0.28 0.02, 0.23 0.02 and 0.22 0.02, for the small, medium and larger IZ diameters, respectively. On the other hand, near image quality predicted by focussing the image formed by the distance optics was considerably lower relatively to the other two IZ diameters. The mean standard deviation values obtained with the three adds were 0.15 0.01, 0.38 0.00 and 0.54 0.01, for the small, medium and larger IZ diameters, respectively. Conclusions: During near viewing through dual-focus CLs, image quality depends on the diameter of the most inner zone of the CL, while add power only affects the range of clear focus when focussing the image formed by the CL near optics. When only image quality gain is taken into consideration, medium and large IZ diameters designs are most likely to promote normal accommodative responses driven by the CL distance optics, while a smaller IZ diameter design is most likely to promote a reduced accommodative response driven by the dual-focus CL near optics. |
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Predicted accommodative response from image quality in young eyes fitted with different dual-focus designsAccommodationBifocalContact lensesDual-focusImage qualityMyopiaCiências Naturais::Ciências FísicasScience & TechnologyPurpose: To investigate the separated and combined influences of inner zone (IZ) diameter and effective add power of dual-focus contact lenses (CL) in the image quality at distance and near viewing, in a functional accommodating model eye. Methods: Computational wave-optics methods were used to define zonal bifocal pupil functions, representing the optic zones of nine dual-focus centre-distance CLs. The dual-focus pupil functions were defined having IZ diameters of 2.10 mm, 3.36 mm and 4.00 mm, with add powers of 1.5 D, 2.0 D and 2.5 D (dioptres), for each design, that resulted in a ratio of 64%/36% between the distance and treatment zone areas, bounded by a 6 mm entrance pupil. A throughfocus routine was implemented in MATLAB to simulate the changes in image quality, calculated from the Visual Strehl ratio, as the eye with the dual-focus accommodates, from 0 to 3.00 D target vergences. Accommodative responses were defined as the changes in the defocus coefficient, combined with a change in fourth and sixth order spherical aberration, which produced a peak in image quality at each target vergence. Results: Distance viewing image quality was marginally affected by IZ diameter but not by add power. Near image quality obtained when focussing the image formed by the near optics was only higher by a small amount compared to the other two IZ diameters. The mean standard deviation values obtained with the three adds were 0.28 0.02, 0.23 0.02 and 0.22 0.02, for the small, medium and larger IZ diameters, respectively. On the other hand, near image quality predicted by focussing the image formed by the distance optics was considerably lower relatively to the other two IZ diameters. The mean standard deviation values obtained with the three adds were 0.15 0.01, 0.38 0.00 and 0.54 0.01, for the small, medium and larger IZ diameters, respectively. Conclusions: During near viewing through dual-focus CLs, image quality depends on the diameter of the most inner zone of the CL, while add power only affects the range of clear focus when focussing the image formed by the CL near optics. When only image quality gain is taken into consideration, medium and large IZ diameters designs are most likely to promote normal accommodative responses driven by the CL distance optics, while a smaller IZ diameter design is most likely to promote a reduced accommodative response driven by the dual-focus CL near optics.This work was funded by the Foundation for Science and Technology (FCT), through the grant SFRH/BPD/116351/ 2016 awarded to Miguel Faria-Ribeiro; Foundation for Science and Technology (FCT). Grant Numbers: SFRH/BPD/116351/2016, PTDC/SAU‐BEB/098391/2008, PEST‐C/FIS/UI607/2011, PTDC/FIS‐OPT/0677/2014info:eu-repo/semantics/publishedVersionWileyUniversidade do MinhoRibeiro, Miguel António FariaSousa, Ana Isabel Carvalho AmorimGonzález-Méijome, José Manuel2018-01-312018-01-31T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/54720engFaria-Ribeiro M, Amorim-de-Sousa A & González-Méijome JM. Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs. Ophthalmic Physiol Opt 2018; 38: 309–316. https://doi.org/10.1111/opo.124430275-54081475-131310.1111/opo.1244329383756https://onlinelibrary.wiley.com/journal/14751313info: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:RCAAP2024-05-11T06:29:28Zoai:repositorium.sdum.uminho.pt:1822/54720Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T06:29:28Repositório 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 |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
title |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
spellingShingle |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs Ribeiro, Miguel António Faria Accommodation Bifocal Contact lenses Dual-focus Image quality Myopia Ciências Naturais::Ciências Físicas Science & Technology |
title_short |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
title_full |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
title_fullStr |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
title_full_unstemmed |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
title_sort |
Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs |
author |
Ribeiro, Miguel António Faria |
author_facet |
Ribeiro, Miguel António Faria Sousa, Ana Isabel Carvalho Amorim González-Méijome, José Manuel |
author_role |
author |
author2 |
Sousa, Ana Isabel Carvalho Amorim González-Méijome, José Manuel |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ribeiro, Miguel António Faria Sousa, Ana Isabel Carvalho Amorim González-Méijome, José Manuel |
dc.subject.por.fl_str_mv |
Accommodation Bifocal Contact lenses Dual-focus Image quality Myopia Ciências Naturais::Ciências Físicas Science & Technology |
topic |
Accommodation Bifocal Contact lenses Dual-focus Image quality Myopia Ciências Naturais::Ciências Físicas Science & Technology |
description |
Purpose: To investigate the separated and combined influences of inner zone (IZ) diameter and effective add power of dual-focus contact lenses (CL) in the image quality at distance and near viewing, in a functional accommodating model eye. Methods: Computational wave-optics methods were used to define zonal bifocal pupil functions, representing the optic zones of nine dual-focus centre-distance CLs. The dual-focus pupil functions were defined having IZ diameters of 2.10 mm, 3.36 mm and 4.00 mm, with add powers of 1.5 D, 2.0 D and 2.5 D (dioptres), for each design, that resulted in a ratio of 64%/36% between the distance and treatment zone areas, bounded by a 6 mm entrance pupil. A throughfocus routine was implemented in MATLAB to simulate the changes in image quality, calculated from the Visual Strehl ratio, as the eye with the dual-focus accommodates, from 0 to 3.00 D target vergences. Accommodative responses were defined as the changes in the defocus coefficient, combined with a change in fourth and sixth order spherical aberration, which produced a peak in image quality at each target vergence. Results: Distance viewing image quality was marginally affected by IZ diameter but not by add power. Near image quality obtained when focussing the image formed by the near optics was only higher by a small amount compared to the other two IZ diameters. The mean standard deviation values obtained with the three adds were 0.28 0.02, 0.23 0.02 and 0.22 0.02, for the small, medium and larger IZ diameters, respectively. On the other hand, near image quality predicted by focussing the image formed by the distance optics was considerably lower relatively to the other two IZ diameters. The mean standard deviation values obtained with the three adds were 0.15 0.01, 0.38 0.00 and 0.54 0.01, for the small, medium and larger IZ diameters, respectively. Conclusions: During near viewing through dual-focus CLs, image quality depends on the diameter of the most inner zone of the CL, while add power only affects the range of clear focus when focussing the image formed by the CL near optics. When only image quality gain is taken into consideration, medium and large IZ diameters designs are most likely to promote normal accommodative responses driven by the CL distance optics, while a smaller IZ diameter design is most likely to promote a reduced accommodative response driven by the dual-focus CL near optics. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-31 2018-01-31T00:00:00Z |
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/1822/54720 |
url |
http://hdl.handle.net/1822/54720 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Faria-Ribeiro M, Amorim-de-Sousa A & González-Méijome JM. Predicted accommodative response from image quality in young eyes fitted with different dual-focus designs. Ophthalmic Physiol Opt 2018; 38: 309–316. https://doi.org/10.1111/opo.12443 0275-5408 1475-1313 10.1111/opo.12443 29383756 https://onlinelibrary.wiley.com/journal/14751313 |
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 |
Wiley |
publisher.none.fl_str_mv |
Wiley |
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 |
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 |
mluisa.alvim@gmail.com |
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1817544989275586560 |