Evidence map›Paper›PMID 29547516›Full record

SynthesisNutrients2018

The Effect of Vitamins on Glaucoma: A Systematic Review and Meta-Analysis.

Wishal D Ramdas, Jan S A G Schouten, Carroll A B Webers

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Nutrients, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
6.1field-weighted citation impact, top 3% 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

44 citing papers in PubMed, 1 synthesis or guideline pooled it, 89 citations in OpenAlex.

  1. Pooled it
  2. Vitamins and nutraceuticals in glaucoma research.European journal of ophthalmology · 2026
    Review
  3. Article
  4. B Vitamins and Ocular Health.Clinical ophthalmology (Auckland, N.Z.) · 2026
    Review
  5. Article
  6. Potential benefits of vitamin A and its derivatives in glaucoma.European journal of medical research · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Review
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Review
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

3 authors at 2 institutions in 1 country.

Wishal D RamdasDepartment of Ophthalmology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands. w.ramdas@mumc.nl.ORCID 0000-0002-1780-5281
Jan S A G SchoutenDepartment of Ophthalmology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands. j.schouten@mumc.nl.
Carroll A B WebersDepartment of Ophthalmology, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands. c.webers@mumc.nl.
Maastricht University · NLErasmus MC · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe aim of is to determine the association of vitamins with glaucoma by performing a systematic review and meta-analyses.

methodsStudies on the relation of vitamins and glaucoma published up to December 2017 were identified in the PubMed and Embase database. Data on vitamins (method of assessment), glaucoma (type and method of assessment), study characteristics and quality were recorded. In case of multiple studies for one nutrient a meta-analysis was performed.

resultsA total of 629 articles were identified of which 36 were included in the systematic review. The meta-analysis included five of them (940 open-angle glaucoma (OAG) cases and 123,697 controls in total) and resulted in an odds ratio [95% confidence interval] (OR [95% CI]) of 0.58 [0.37-0.91] for dietary vitamin A, though heterogeneity was high (I² = 51%). After omitting studies that contributed significantly to the heterogeneity, the pooled OR [95% CI] was 0.45 [0.30-0.68] for dietary vitamin A on OAG (I² = 0%). For vitamin B1, C and E no significant association with OAG was found (OR [95% CI]: 0.84 [0.47-1.51]; 0.68 [0.38-1.22]; 0.95 [0.75-1.19]; respectively). However, after addressing heterogeneity, vitamin C showed a protective effect as well. Especially, foods high in these vitamins (e.g., dark green vegetables) were protective for OAG.

conclusionsDietary intake of vitamin A and C showed a beneficial association with OAG; however, findings on blood levels of vitamins do not show a clear relation with OAG.

Indexed as

DietAdultAgedAscorbic AcidChi-Square DistributionGlaucoma, Open-AngleHumansMiddle AgedOdds RatioPrevalencePrognosisProtective FactorsRisk FactorsVitamin AAscorbic AcidVitamin Ablood levelsdietary intakeglaucomanitric oxidevitamins

Identifiers

PMID29547516
PMCPMC5872777
OpenAlexW2790941992

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.