Evidence map›Paper›PMID 30716149›Full record

ArticleInvestigative ophthalmology & visual science2019

Visual Crowding in Glaucoma.

Nara G Ogata, Erwin R Boer, Fábio B Daga, Alessandro A Jammal, James M Stringham, Felipe A Medeiros

Abstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Effect of Visual Crowding on Quality of Life in Glaucoma Patients.Investigative ophthalmology & visual science · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Treadmill-walking impairs visual function in early glaucoma and elderly controls.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
    Article
  10. Article
  11. Review
  12. Rapid assessment of peripheral visual crowding.Frontiers in neuroscience · 2024
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Effects of glaucoma on detection and discrimination of image blur.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2022
    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

6 authors.

Nara G OgataDuke Eye Center, Department of Ophthalmology, Duke University, Durham, North Carolina, United States.
Erwin R BoerEntropy Control, La Jolla, California, United States.
Fábio B DagaDuke Eye Center, Department of Ophthalmology, Duke University, Durham, North Carolina, United States.
Alessandro A JammalDuke Eye Center, Department of Ophthalmology, Duke University, Durham, North Carolina, United States.
James M StringhamDuke Eye Center, Department of Ophthalmology, Duke University, Durham, North Carolina, United States.
Felipe A MedeirosDuke Eye Center, Department of Ophthalmology, Duke University, Durham, North Carolina, United States.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Purpose: Crowding refers to the phenomenon in which objects that can be recognized when viewed in isolation are unrecognizable in clutter. Crowding sets a fundamental limit to the capabilities of the peripheral vision and is essential in explaining performance in a broad array of daily tasks. Due to the effects of glaucoma on peripheral vision, we hypothesized that neural loss in the disease would lead to stronger effects of visual crowding. Methods: Subjects were asked to discriminate the orientation of a target letter when presented with surrounding flankers. The critical spacing value (scritical), which was required for correct discrimination of letter orientation, was obtained for each quadrant of the visual field. scritical values were correlated with standard automated perimetry (SAP) mean sensitivity (MS) and optical coherence tomography (OCT) retinal nerve fiber layer (RNFL) thickness measurements. Results: The study involved 13 subjects with mild glaucomatous visual field loss and 13 healthy controls. Glaucomatous eyes had significantly greater (worse) scritical than controls (170.4 ± 27.1 vs. 145.8 ± 28.0 minimum of visual angle, respectively; P = 0.007). scritical measurements were significantly associated with RNFL thickness measurements (R2 = 26%; P < 0.001) but not with SAP MS (P = 0.947). Conclusions: In glaucoma patients, a pronounced visual crowding effect is observed, even in the presence of mild visual field loss on standard perimetry. scritical was associated with the amount of neural loss quantified by OCT. These results may have implications for understanding how glaucoma patients are affected in daily tasks where crowding effects may be significant.

Indexed as

CrowdingAgedAged, 80 and overFemaleGlaucoma, Open-AngleHumansIntraocular PressureLongitudinal StudiesMaleMiddle AgedNerve FibersOptic Nerve DiseasesProspective StudiesPsychophysicsRetinal Ganglion CellsTomography, Optical Coherence

Identifiers

PMID30716149
PMCPMC6361551

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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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.