Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task

The data presented in this study are available upon request from the corresponding author.

Detalles Bibliográficos
Autores: Safarian Baloujeh, Ebrahim, Queirós, António, Navarro, Rafael, González-Méijome, José M.
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/390003
Acceso en línea:http://hdl.handle.net/10261/390003
Access Level:acceso abierto
Palabra clave:Accommodation
Sustained reading
Autorefractometry
Presbyopia
Peak velocity
id ES_3227ab79d6d70fe538a8cdfd504e0f7c
oai_identifier_str oai:digital.csic.es:10261/390003
network_acronym_str ES
network_name_str España
repository_id_str
spelling Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading taskSafarian Baloujeh, EbrahimQueirós, AntónioNavarro, RafaelGonzález-Méijome, José M.AccommodationSustained readingAutorefractometryPresbyopiaPeak velocityThe data presented in this study are available upon request from the corresponding author.This article belongs to the Special Issue Presbyopia, Laser, Cataract and Refractive Surgery: State-of-the-Art Research.[Objectives]: To investigate the dynamics of accommodation during and immediately after a sustained reading task on a digital device across various age groups under monocular and binocular conditions.[Methods]: Seventeen subjects were selected and divided into three age groups: young adults (n = 4, age: 21.3 ± 3.2 years), adults (n = 4, age: 34 ± 3.56 years), and incipient presbyopes (n = 9, age: 45 ± 3.61 years). Dynamic accommodation and disaccommodation were objectively measured using the WAM-5500 open-view autorefractor during 2 min of distance fixation (Maltese cross at 6 m), 5 min of sustained near reading on a teleprompter app at the nearest readable distance, and 2 min of distance vision. Six sequential temporal landmarks were identified. Quantitative metrics for accommodation lag (AL), slope of slow accommodation (SSA), slope of slow disaccommodation (SSD), peak velocity of accommodation (PVA) and peak velocity of disaccommodation (PVD) were obtained as absolute values of spherical equivalent refractive (SER) change.[Results]: SSA, SSD, and AL were significantly and positively correlated with age (ρ = 0.75, 0.73, 0.51, respectively; p ≤ 0.038). For subjects under 45 years of age SSA and SSD increased quadratically with age, while for those above 45 years, both SSA and SSD decreased linearly. Linear regression of PVA and PVD with age indicated that the disaccommodation mechanism is faster than accommodation (slope = -0.15 and -0.23, respectively). PVA was significantly faster under monocular than binocular conditions (p = 0.124).[Conclusions]: Incipient presbyopes demonstrate a complex response in both accommodation and disaccommodation. The accommodation system responds quickly, but there is also a slower response that can provide up to an additional 1D of accommodative response during sustained near reading tasks. It is hypothesized that the crystalline lens exhibits hysteresis in returning to its unaccommodated state, due to its viscoelastic properties, which means it takes time to relax.This project received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No. 956720. This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/04650/2020.Peer reviewedMultidisciplinary Digital Publishing InstituteEuropean CommissionFundação para a Ciência e a Tecnologia (Portugal)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501application/pdfhttp://hdl.handle.net/10261/390003reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/956720https://doi.org/10.3390/jcm14041107Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3900032026-05-22T06:33:51Z
dc.title.none.fl_str_mv Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
title Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
spellingShingle Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
Safarian Baloujeh, Ebrahim
Accommodation
Sustained reading
Autorefractometry
Presbyopia
Peak velocity
title_short Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
title_full Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
title_fullStr Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
title_full_unstemmed Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
title_sort Fast and slow response of the accommodation system in young and incipient-presbyope adults during sustained reading task
dc.creator.none.fl_str_mv Safarian Baloujeh, Ebrahim
Queirós, António
Navarro, Rafael
González-Méijome, José M.
author Safarian Baloujeh, Ebrahim
author_facet Safarian Baloujeh, Ebrahim
Queirós, António
Navarro, Rafael
González-Méijome, José M.
author_role author
author2 Queirós, António
Navarro, Rafael
González-Méijome, José M.
author2_role author
author
author
dc.contributor.none.fl_str_mv European Commission
Fundação para a Ciência e a Tecnologia (Portugal)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Accommodation
Sustained reading
Autorefractometry
Presbyopia
Peak velocity
topic Accommodation
Sustained reading
Autorefractometry
Presbyopia
Peak velocity
description The data presented in this study are available upon request from the corresponding author.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/390003
url http://hdl.handle.net/10261/390003
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/956720
https://doi.org/10.3390/jcm14041107
Sí
dc.rights.none.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 Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405657447268352
score 15,812429

Similares en LA Referencia