Evidence map›Paper›PMID 28666278›Full record

ArticleInvestigative ophthalmology & visual science2017

The Effect of Change in Intraocular Pressure on Choroidal Structure in Glaucomatous Eyes.

Xuemin Zhang, Emily Cole, Angelique Pillar, Mark Lane, Nadia Waheed, Mehreen Adhi, Laurence Magder, Harry Quigley, Osamah Saeedi

Open access · goldAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2017. 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
2.8field-weighted citation impact, top 10% 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, 35 citations in OpenAlex.

  1. Trial
  2. Article
  3. Observational
  4. Comparable choroidal thickness between treated eyes and untreated fellow-eyes in patients with unilateral neovascular AMD: a paired-eyes comparative study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  5. Observational
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  7. Observational
  8. Article
  9. Article
  10. Effect of SCUBA Diving on Ophthalmic Parameters.Medicina (Kaunas, Lithuania) · 2022
    Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Observational
  16. Article
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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

9 authors at 6 institutions in 2 countries.

Xuemin ZhangMedstar Harbor Hospital, Baltimore, Maryland, United States.
Emily ColeTufts University School of Medicine, Boston, Massachusetts, United States.
Angelique PillarDepartment of Ophthalmology and Visual Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States.
Mark LaneUniversity Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom.
Nadia WaheedNew England Eye Center/Tufts University School of Medicine, Boston, Massachusetts, United States.
Mehreen AdhiDepartment of Ophthalmology and Visual Sciences, University of Louisville School of Medicine, Louisville, Kentucky, United States.
Laurence MagderUniversity of Maryland School of Medicine, Baltimore, Maryland, United States.
Harry QuigleyGlaucoma Center of Excellence, Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland, United States.
Osamah SaeediDepartment of Ophthalmology and Visual Sciences, University of Maryland School of Medicine, Baltimore, Maryland, United States.
University of Maryland, Baltimore · USTufts University · USJohns Hopkins University · USMedStar Harbor Hospital · USUniversity Hospitals Birmingham NHS Foundation Trust · GBUniversity of Louisville · US

Funding

Role of Capillary Flow and Autoregulation in Primary Open Angle GlaucomaK23EY025014 · NEI · UNIVERSITY OF MARYLAND BALTIMORE · PI SAEEDI, OSAMAH JAWAID · 2015 to 2019
$1.0M
NEI NIH HHS K23 EY025014
6 · The paper itself

Abstract

Purpose: Choroidal thickness increases linearly with intraocular pressure (IOP) lowering. We studied the relationship between the change in size of the choroidal vasculature and IOP lowering after glaucoma procedures. Methods: Thirty eyes of twenty-nine patients were examined pre- and postoperatively for up to 6 months with standard clinical assessment, enhanced depth imaging spectral-domain optical coherence tomography (OCT), and axial length measurement. Each enhanced depth imaging spectral-domain OCT image was analyzed using three separate methods to determine the choroidal thickness, choroidal vessel thickness, choroidal interstitial thickness, large choroidal vessel layer thickness, medium choroidal vessel layer thickness, and light-dark ratio. Bivariate linear regression analysis was completed with largest change in IOP as the independent variable. The dependent variables included choroidal thickness, choroidal vessel thickness, and choroidal interstitial thickness, at the largest change in IOP. Multivariable regression analysis using a generalized estimating equation to account for multiple measurements per eye was also completed. Results: Mean choroidal vessel thickness increases 1.5 μm for every 1 mm Hg decrease in IOP (P < 0.0001; 95% confidence interval [CI], 0.8, 2.1) and choroidal interstitial thickness increases 1.3 μm for every 1 mm Hg change in IOP (P < 0.0001; 95% CI, 0.8, 1.8). There was no significant association between change in IOP and change in large choroidal vessel layer temporally (P = 0.13), nasally (P = 0.20), or subfoveally (P = 0.18). There was also no association between IOP and the light-dark ratio (P = 0.16). Conclusions: The increase in choroidal thickness at lower IOP is associated with approximately equal increases in its intravascular and extravascular compartments.

Indexed as

AgedAged, 80 and overAxial Length, EyeChoroidFemaleGlaucomaHumansIntraocular PressureMaleMiddle AgedProspective StudiesRegression AnalysisTomography, Optical CoherenceTonometry, OcularTrabeculectomy

Identifiers

PMID28666278
PMCPMC5493330
OpenAlexW2724508485

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.