Evidence mapPaperPMID 35616273Full record

ArticleClinical & experimental ophthalmology2022

Retinal neural dysfunction in diabetes revealed with handheld chromatic pupillometry.

Tien-En Tan, Maxwell T Finkelstein, Gavin Siew Wei Tan, Anna Cheng Sim Tan, Choi Mun Chan, Ranjana Mathur, Edmund Yick Mun Wong, Chui Ming Gemmy Cheung, Tien Yin Wong, Dan Milea and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Clinical & experimental ophthalmology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
4.9field-weighted citation impact, top 4% 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

15 citing papers in PubMed, 25 citations in OpenAlex.

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  15. Diabetic retinopathy: Looking forward to 2030.Frontiers in endocrinology · 2022
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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

11 authors at 2 institutions in 1 country.

Tien-En TanSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.ORCID 0000-0002-9869-5159
Maxwell T FinkelsteinSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Gavin Siew Wei TanSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Anna Cheng Sim TanSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Choi Mun ChanSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Ranjana MathurSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Edmund Yick Mun WongSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Chui Ming Gemmy CheungSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Tien Yin WongSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Dan MileaSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.
Raymond P NajjarSingapore Eye Research Institute, Singapore, Singapore National Eye Centre, Singapore, Singapore.ORCID 0000-0002-3770-2300
National University of Singapore · SGSingapore National Eye Center · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo evaluate the ability of handheld chromatic pupillometry to reveal and localise retinal neural dysfunction in diabetic patients with and without diabetic retinopathy (DR).

methodsThis cross-sectional study included 82 diabetics (DM) and 93 controls (60.4 ± 8.4 years, 44.1% males). DM patients included those without (n = 25, 64.7 ± 6.3 years, 44.0% males) and with DR (n = 57, 60.3 ± 8.5 years, 64.9% males). Changes in horizontal pupil radius in response to blue (469 nm) and red (640 nm) light stimuli were assessed monocularly, in clinics, using a custom-built handheld pupillometer. Pupillometric parameters (phasic constriction amplitudes [predominantly from the outer retina], maximal constriction amplitudes [from the inner and outer retina] and post-illumination pupillary responses [PIPRs; predominantly from the inner retina]) were extracted from baseline-adjusted pupillary light response traces and compared between controls, DM without DR, and DR. Net PIPR was defined as the difference between blue and red PIPRs.

resultsPhasic constriction amplitudes to blue and red lights were decreased in DR compared to controls (p < 0.001; p < 0.001). Maximal constriction amplitudes to blue and red lights were decreased in DR compared to DM without DR (p < 0.001; p = 0.02), and in DM without DR compared to controls (p < 0.001; p = 0.005). Net PIPR was decreased in both DR and DM without DR compared to controls (p = 0.02; p = 0.03), suggesting a wavelength-dependent (and hence retinal) pupillometric dysfunction in diabetic patients with or without DR.

conclusionsHandheld chromatic pupillometry can reveal retinal neural dysfunction in diabetes, even without DR. Patients with DM but no DR displayed primarily inner retinal dysfunction, while patients with DR showed both inner and outer retinal dysfunction.

Indexed as

Diabetes MellitusDiabetic RetinopathyCross-Sectional StudiesFemaleHumansMalePhotic StimulationPupilReflex, PupillaryRetinal Ganglion CellsRod OpsinsRod Opsinsdiabetesdiabetic retinopathymelanopsinphotoreceptorspupillometryretinal degenerations

Identifiers

PMID35616273
PMCPMC9796882
OpenAlexW4281561290

What Socratic holds

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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 Socratic graph.