Evidence map›Paper›PMID 33990634›Full record

Observational studyScientific reports2021

Scotopic thresholds on dark-adapted chromatic perimetry in healthy aging and age-related macular degeneration.

Manjot Kaur Grewal, Shruti Chandra, Alan Bird, Glen Jeffery, Sobha Sivaprasad

Open access · goldAbstract readObservational Study
In one paragraph

Observational study in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
0.9field-weighted citation impact, top 28% 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

4 citing papers in PubMed, 7 citations in OpenAlex.

  1. Visual Function Assessment in Geographic Atrophy: A Review.Clinical & experimental ophthalmology · 2026
    Review
  2. Article
  3. Article
  4. Retinitis Pigmentosa: Current Clinical Management and Emerging Therapies.International journal of molecular sciences · 2023
    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

5 authors at 2 institutions in 1 country.

Manjot Kaur GrewalInstitute of Ophthalmology, University College London, London, EC1V 9EL, UK.
Shruti ChandraInstitute of Ophthalmology, University College London, London, EC1V 9EL, UK.
Alan BirdInstitute of Ophthalmology, University College London, London, EC1V 9EL, UK.
Glen JefferyInstitute of Ophthalmology, University College London, London, EC1V 9EL, UK.
Sobha SivaprasadInstitute of Ophthalmology, University College London, London, EC1V 9EL, UK. sobha.sivaprasad@nhs.net.
University College London · GBNIHR Moorfields Biomedical Research Centre · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To evaluate the effect of aging, intra- and intersession repeatability and regional scotopic sensitivities in healthy and age-related macular degeneration (AMD) eyes. Intra- and intersession agreement and effect of age was measured in healthy individuals. The mean sensitivity (MS) and pointwise retinal sensitivities (PWS) within the central 24° with 505 nm (cyan) and 625 nm (red) stimuli were evaluated in 50 individuals (11 healthy and 39 AMD eyes). The overall intra- and intersession had excellent reliability (intraclass correlation coefficient, ICC > 0.90) and tests were highly correlated (Spearman r

Indexed as

AdultAgingDark AdaptationHealthy VolunteersHumansMacular DegenerationMaleMiddle AgedReproducibility of ResultsRetinal DrusenRetinal Rod Photoreceptor CellsVisual Field Tests

Identifiers

PMID33990634
PMCPMC8121851
OpenAlexW3161616146

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.