Adaptation to Progressive Additive Lenses: Potential Factors to Consider

Abstract People develop presbyopia as part of the normal aging process. Most presbyopes adapt to progressive additive lens (PALs), while others do not. This investigation sought to determine whether the ability to modify disparity vergence or phoria was correlated to PALs adaptation. In experiment 1...

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Autores principales:	Tara L. Alvarez, Eun H. Kim, Bérangère Granger-Donetti
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ef837faf216a4d43a2ced228f5716ea9
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spelling	oai:doaj.org-article:ef837faf216a4d43a2ced228f5716ea92021-12-02T12:31:47ZAdaptation to Progressive Additive Lenses: Potential Factors to Consider10.1038/s41598-017-02851-52045-2322https://doaj.org/article/ef837faf216a4d43a2ced228f5716ea92017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02851-5https://doaj.org/toc/2045-2322Abstract People develop presbyopia as part of the normal aging process. Most presbyopes adapt to progressive additive lens (PALs), while others do not. This investigation sought to determine whether the ability to modify disparity vergence or phoria was correlated to PALs adaptation. In experiment 1, a double-step paradigm quantified the ability to modify convergence responses in sixteen presbyopes. In experiment 2, thirty-one incipient presbyopes participated in a 5-minute sustained fixation task to evoke phoria adaptation where the magnitude and rate of phoria adaptation were measured. Then, the experiment was repeated after wearing PALs for one month. Linear regression analyses were conducted between the following parameters: near point of convergence, positive fusional vergence at near, vergence facility, net change in the magnitude of phoria adaptation, and the rate of phoria adaptation. The ability to change convergence average peak velocity was significantly greater (p < 0.03) in presbyopic PALs adapters compared to presbyopic PALs non-adapters. The rate of phoria adaptation and vergence facility were significantly greater (p < 0.03) in incipient presbyopic PALs adapters compared to incipient presbyopic PALs non-adapters. Vergence facility and the rate of phoria adaptation may have potential clinical utility in differentiating which patients may adapt to PALs and which ones will have more difficulty.Tara L. AlvarezEun H. KimBérangère Granger-DonettiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tara L. Alvarez Eun H. Kim Bérangère Granger-Donetti Adaptation to Progressive Additive Lenses: Potential Factors to Consider
description	Abstract People develop presbyopia as part of the normal aging process. Most presbyopes adapt to progressive additive lens (PALs), while others do not. This investigation sought to determine whether the ability to modify disparity vergence or phoria was correlated to PALs adaptation. In experiment 1, a double-step paradigm quantified the ability to modify convergence responses in sixteen presbyopes. In experiment 2, thirty-one incipient presbyopes participated in a 5-minute sustained fixation task to evoke phoria adaptation where the magnitude and rate of phoria adaptation were measured. Then, the experiment was repeated after wearing PALs for one month. Linear regression analyses were conducted between the following parameters: near point of convergence, positive fusional vergence at near, vergence facility, net change in the magnitude of phoria adaptation, and the rate of phoria adaptation. The ability to change convergence average peak velocity was significantly greater (p < 0.03) in presbyopic PALs adapters compared to presbyopic PALs non-adapters. The rate of phoria adaptation and vergence facility were significantly greater (p < 0.03) in incipient presbyopic PALs adapters compared to incipient presbyopic PALs non-adapters. Vergence facility and the rate of phoria adaptation may have potential clinical utility in differentiating which patients may adapt to PALs and which ones will have more difficulty.
format	article
author	Tara L. Alvarez Eun H. Kim Bérangère Granger-Donetti
author_facet	Tara L. Alvarez Eun H. Kim Bérangère Granger-Donetti
author_sort	Tara L. Alvarez
title	Adaptation to Progressive Additive Lenses: Potential Factors to Consider
title_short	Adaptation to Progressive Additive Lenses: Potential Factors to Consider
title_full	Adaptation to Progressive Additive Lenses: Potential Factors to Consider
title_fullStr	Adaptation to Progressive Additive Lenses: Potential Factors to Consider
title_full_unstemmed	Adaptation to Progressive Additive Lenses: Potential Factors to Consider
title_sort	adaptation to progressive additive lenses: potential factors to consider
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ef837faf216a4d43a2ced228f5716ea9
work_keys_str_mv	AT taralalvarez adaptationtoprogressiveadditivelensespotentialfactorstoconsider AT eunhkim adaptationtoprogressiveadditivelensespotentialfactorstoconsider AT berangeregrangerdonetti adaptationtoprogressiveadditivelensespotentialfactorstoconsider
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Adaptation to Progressive Additive Lenses: Potential Factors to Consider

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