Evidence map›Paper›PMID 23927893›Full record

ArticleInvestigative ophthalmology & visual science2013

Influence of shape and gradient refractive index in the accommodative changes of spherical aberration in nonhuman primate crystalline lenses.

Alberto de Castro, Judith Birkenfeld, Bianca Maceo, Fabrice Manns, Esdras Arrieta, Jean-Marie Parel, Susana Marcos

Open access · bronzeAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.1field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 39 citations in OpenAlex.

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  12. Predicting Accommodative Response Using Paraxial Schematic Eye Models.Optometry and vision science : official publication of the American Academy of Optometry · 2016
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 2 countries.

Alberto de CastroInstituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain.
Judith Birkenfeld
Bianca Maceo
Fabrice Manns
Esdras Arrieta
Jean-Marie Parel
Susana Marcos
University of Miami · USInstituto de Óptica "Daza de Valdés" · ESConsejo Superior de Investigaciones Científicas · ES

Funding

Shared Equipment ModuleP30EY014801 · NEI · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI Marco Ruggeri · 2004 to 2026
$12.2M
Optomechanical charactristics of lens accommodationR01EY014225 · NEI · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI MANNS, FABRICE · 2002 to 2019
$5.5M
Optics of the Growing Crystalline LensR01EY021834 · NEI · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI MANNS, FABRICE · 2012 to 2016
$2.3M
Crystalline lens optics in accommodation and presbyopiaF31EY021444 · NEI · UNIVERSITY OF MIAMI CORAL GABLES · PI HEILMAN, BIANCA MACEO · 2011 to 2015
$179k
European Research Council 294099NEI NIH HHS 1F31EY021444NEI NIH HHS 1R01EY021834NEI NIH HHS 2R01EY14225NEI NIH HHS F31 EY021444NEI NIH HHS P30 EY014801NEI NIH HHS P30EY14801NEI NIH HHS R01 EY014225NEI NIH HHS R01 EY021834
6 · The paper itself

Abstract

purposeTo estimate changes in surface shape and gradient refractive index (GRIN) profile in primate lenses as a function of accommodation. To quantify the contribution of surface shape and GRIN to spherical aberration changes with accommodation.

methodsCrystalline lenses from 15 cynomolgus monkeys were studied in vitro under different levels of accommodation produced by a stretching system. Lens shape was obtained from optical coherence tomography (OCT) cross-sectional images. The GRIN was reconstructed with a search algorithm using the optical path measured from OCT images and the measured back focal length. The spherical aberration of the lens was estimated as a function of accommodation using the reconstructed GRIN and a homogeneous refractive index.

resultsThe lens anterior and posterior radii of curvature decreased with increasing lens power. Both surfaces exhibited negative asphericities in the unaccommodated state. The anterior surface conic constant shifted toward less negative values with accommodation, while the value of the posterior remained constant. GRIN parameters remained constant with accommodation. The lens spherical aberration with GRIN distribution was negative and higher in magnitude than that with a homogeneous equivalent refractive index (by 29% and 53% in the unaccommodated and fully accommodated states, respectively). Spherical aberration with the equivalent refractive index shifted with accommodation toward negative values (-0.070 μm/diopter [D]), but the reconstructed GRIN shifted it farther (-0.124 μm/D).

conclusionsWhen compared with the lens with the homogeneous equivalent refractive index, the reconstructed GRIN lens has more negative spherical aberration and a larger shift toward more negative values with accommodation.

Indexed as

Accommodation, OcularAnimalsCorneal Wavefront AberrationLens, CrystallineMacaca fascicularisRefraction, OcularTomography, Optical Coherenceaccommodationcrystalline lensgradient refractive indexGRINspherical aberration

Identifiers

PMID23927893
PMCPMC3771709
OpenAlexW2003707915

What OpenQuestion holds

Textmetadata
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.