Evidence map›Paper›PMID 29847643›Full record

ArticleInvestigative ophthalmology & visual science2018

High-Resolution, Three-Dimensional Reconstruction of the Outflow Tract Demonstrates Segmental Differences in Cleared Eyes.

Susannah Waxman, Ralitsa T Loewen, Yalong Dang, Simon C Watkins, Alan M Watson, Nils A Loewen

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 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
1.3field-weighted citation impact, top 22% 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

20 citing papers in PubMed, 8 citations in OpenAlex.

  1. Vascular regeneration and blood flow recovery in glaucoma.Frontiers in cell and developmental biology · 2026
    Review
  2. Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Aqueous outflow regulation - 21st century concepts.Progress in retinal and eye research · 2021
    Review
  8. Review
  9. Aqueous Angiography in Normal Canine Eyes.Translational vision science & technology · 2020
    Article
  10. Article
  11. Minimally Invasive Glaucoma Surgery: What Do We Know? Where Should We Go?Translational vision science & technology · 2020
    Review
  12. Article
  13. Article
  14. Article
  15. Outflow facility and extent of angle closure in a porcine model.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2019
    Article
  16. Five-year clinical outcomes of combined phacoemulsification and trabectome surgery at a single glaucoma center.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2019
    Article
  17. Article
  18. Article
  19. Outflow enhancement by three different ab interno trabeculectomy procedures in a porcine anterior segment model.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2018
    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

6 authors at 1 institution in 1 country.

Susannah WaxmanDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Ralitsa T LoewenDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Yalong DangDepartment of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Simon C WatkinsCenter for Biologic Imaging and the Department of Cellular Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Alan M WatsonCenter for Biologic Imaging and the Department of Cellular Biology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States.
Nils A LoewenDepartment 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 Paul R. Kinchington · 1989 to 2026
$17.8M
Reverse Engineering of Trabecular MeshworkK08EY022737 · NEI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI LOEWEN, NILS A · 2012 to 2016
$993k
NEI NIH HHS K08 EY022737NEI NIH HHS P30 EY008098
6 · The paper itself

Abstract

Purpose: The rate of conventional aqueous humor outflow is the highest nasally. We hypothesized that this is reflected in regionally different outflow structures and analyzed the entire limbus by high-resolution, full-thickness ribbon-scanning confocal microscopy (RSCM). Methods: We perfused pig eyes by anterior chamber cannulation with eight lectin-fluorophore conjugates, followed by optical clearance with benzyl alcohol benzyl benzoate (BABB). RSCM and advanced analysis software (Imaris) were used to reconstruct a three-dimensional (3D), whole-specimen rendering of the perilimbal outflow structures. We performed morphometric analyses of the outflow tract from the level of the trabecular meshwork (TM) to the scleral vascular plexus (SVP). Results: Except for pigmented structures, BABB cleared the entire eye. Rhodamine-conjugated Glycine max agglutinin (soybean [SBA]) labeled the outflow tract evenly and retained fluorescence for months. RSCM produced terabyte-sized files allowing for in silico dissection of outflow tract vessels at a high resolution and in 3D. Networks of interconnected lumens were traced from the TM to downstream drainage structures. The collector channel (CC) volumes were 10 times smaller than the receiving SVP vessels, the largest of which were in the inferior limbus. Proximal CC diameters were up to four times the size of distal diameters and more elliptical at their proximal ends. The largest CCs were found in the superonasal and inferonasal quadrants where the highest outflow occurs. Conclusion: RSCM of cleared eyes enabled high-resolution, volumetric analysis of the outflow tract. The proximal structures had greater diameters nasally, whereas the SVP was larger in the inferior limbus.

Indexed as

Imaging, Three-DimensionalAnimalsAqueous HumorIntraocular PressureMicroscopy, ConfocalModels, AnimalScleraSwineTrabecular Meshwork

Identifiers

PMID29847643
PMCPMC5939687
OpenAlexW2765780343

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.