Evidence map›Paper›PMID 30304458›Full record

ArticleInvestigative ophthalmology & visual science2018

Radial and Circumferential Collagen Fibers Are a Feature of the Peripapillary Sclera of Human, Monkey, Pig, Cow, Goat, and Sheep.

Alexandra Gogola, Ning-Jiun Jan, Kira L Lathrop, Ian A Sigal

Open access · goldAbstract readComparative Study
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 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
5.2field-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

39 citing papers in PubMed, 72 citations in OpenAlex.

  1. Article
  2. Article
  3. Observational
  4. Article
  5. Pericytes in the optic nerve head.Progress in retinal and eye research · 2025
    Review
  6. Article
  7. Article
  8. Article
  9. Article
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  11. Article
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  15. Article
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  17. Article
  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

4 authors at 1 institution 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.
Kira L LathropDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Ian A SigalDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
University of Pittsburgh · 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
NEI NIH HHS P30 EY008098NEI NIH HHS R01 EY023966
6 · The paper itself

Abstract

Purpose: To test the hypothesis that human, monkey, pig, sheep, cow, and goat eyes exhibit circumferential, radial, and interweaving collagen architecture in the posterior sclera. Methods: We analyzed 1,327 cryosections from the posterior poles of 4 human, 4 monkey, 5 pig, 8 sheep, 1 goat, and 2 cow eyes. Images were acquired using polarized light microscopy and processed to obtain polar fiber orientations relative to the center of the canal. Circumferential, radial, and interweaving regions were identified and analyzed for mean fiber orientation and anisotropy and region width and thickness. Results: Every eye exhibited circumferential, radial, and interweaving fibers in consistent locations. Radial fibers extended out from near the canal into the peripapillary and peripheral sclera in the innermost sclera. Circumferential fibers were directly adjacent to the canal and most prevalent in the outermost, posterior sclera. Interweaving fibers were found throughout the sclera thickness. Across all species, median anisotropy in the radial, circumferential, and interweaving regions were 0.95, 0.96, and 0.28, respectively. Conclusions: Regions of radial, circumferential, and interweaving fibers occur in the posterior pole sclera of human, monkey, pig, sheep, cow, and goat eyes. The consistency across species in scleral architecture suggests that they are primary organizational components whose functions should be better understood.

Indexed as

AnimalsAnisotropyCattleCollagenGoatsHumansMacacaMicroscopy, PolarizationOptic DiskScleraSheepSwineCollagen

Identifiers

PMID30304458
PMCPMC6166897
OpenAlexW2897250378

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.