Evidence map›Paper›PMID 30025116›Full record

ArticleInvestigative ophthalmology & visual science2018

Spatial Patterns and Age-Related Changes of the Collagen Crimp in the Human Cornea and Sclera.

Alexandra Gogola, Ning-Jiun Jan, Bryn Brazile, Po Lam, Kira L Lathrop, Kevin C Chan, Ian A Sigal

Open access · goldAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
5.4field-weighted citation impact, top 4% 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

36 citing papers in PubMed, 68 citations in OpenAlex.

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  17. Biomechanics of open-globe injury: a review.Biomedical engineering online · 2023
    Review
  18. Stretch-Induced Uncrimping of Equatorial Sclera Collagen Bundles.Journal of biomechanical engineering · 2023
    Article
  19. Article
  20. Article
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 2 institutions in 1 country.

Alexandra GogolaDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Ning-Jiun JanDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Bryn BrazileDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Po LamDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Kira L LathropDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Kevin C ChanDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Ian A SigalDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
University of Pittsburgh · USNew York University · US

Funding

Virus Production and Manipulation of Protein/Gene Expression ModuleP30EY008098 · NEI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Ethan A Rossi · 1989 to 2026
$17.8M
Optic nerve head microstructure, biomechanics and susceptibility to glaucomaR01EY023966 · NEI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Ian A Sigal · 2014 to 2026
$3.8M
Interdisciplinary Visual Sciences (IVS) Traininig ProgramT32EY017271 · NEI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Marlene Behrmann, Paul R. Kinchington · 2008 to 2026
$3.6M
NEI NIH HHS P30 EY008098NEI NIH HHS R01 EY023966NEI NIH HHS T32 EY017271
6 · The paper itself

Abstract

Purpose: Collagen is the main load-bearing component of the eye, and collagen crimp is a critical determinant of tissue mechanical behavior. We test the hypothesis that collagen crimp morphology varies over the human cornea and sclera and with age. Methods: We analyzed 42 axial whole-globe sections from 20 normal eyes of 20 human donors, ranging in age from 0.08 (1 month) to 97 years. The sections were imaged using polarized light microscopy to obtain μm-scale fiber bundle/lamellae orientation from two corneal and six scleral regions. Crimp morphology was quantified through waviness, tortuosity, and amplitude. Results: Whole-globe median waviness, tortuosity, and amplitude were 0.127 radians, 1.002, and 0.273 μm, respectively. These parameters, however, were not uniform over the globe, instead exhibiting distinct, consistent patterns. All crimp parameters decreased significantly with age, with significantly different age-related decreases between regions. The crimp morphology of the limbus changed the most drastically with age, such that it had the largest crimp in neonates, and among the smallest in the elderly. Conclusions: Age-related decreases in crimp parameters are likely one of the mechanisms underlying age-related stiffening of the sclera and cornea, potentially influencing sensitivity to IOP. Further work is needed to determine the biomechanical implications of the crimp patterns observed. The comparatively large changes in the crimp morphology of the limbus, especially in the early years of life, suggest that crimp in this region may play a role in eye development, although the exact nature of this is unclear.

Indexed as

AdolescentAdultAgedAged, 80 and overAgingChildChild, PreschoolCollagenCorneaFemaleHealthy VolunteersHumansInfantInfant, NewbornMaleMicroscopy, PolarizationCollagen

Identifiers

PMID30025116
PMCPMC5995484
OpenAlexW2808208642

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.