Evidence map›Paper›PMID 26522707›Full record

ArticleOphthalmology2016

Delayed Rod-Mediated Dark Adaptation Is a Functional Biomarker for Incident Early Age-Related Macular Degeneration.

Cynthia Owsley, Gerald McGwin, Mark E Clark, Gregory R Jackson, Michael A Callahan, Lanning B Kline, C Douglas Witherspoon, Christine A Curcio

2 registry-linked trialsAbstract read
In one paragraph

Article in Ophthalmology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 152 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
152citing papers in PubMed, 2 pooled it
15.1field-weighted citation impact, top 1% 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.

NCT02873351 phase2withdrawnnot on this mapstarted 2019, after this paper: background citation

Pilot Study of L-DOPA Safety and Tolerability in Patients With AMD, and Proof of Concept That L-DOPA Improves Surrogate Biomarkers in Patients With Moderate to Advanced AMD

TypeinterventionalSponsorSnyder, Robert W., M.D., Ph.D., P.C.Ran2019 to 2020Enrolled0ConditionsAge-related Macular DegenerationArmscarbidopa-levodopa 25-100 mg, placebo for carbidopa-levodopa 25-100 mg
NCT03166202 completednot on this mapstarted 2018, after this paper: background citation

Age-Related Macular Degeneration, Scotopic Dysfunction, and Driving Performance in a Simulator

TypeobservationalSponsorUniversity of Alabama at BirminghamRan2018 to 2019Enrolled40ConditionsAge-related Macular Degeneration
3 · Its place in the literature

Who cites it

152 citing papers in PubMed, 2 syntheses or guidelines pooled it, 224 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Impaired Rod-Mediated Vision is the Functional Hallmark of Ageing and Early and Intermediate Age-Related Macular Degeneration.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Review
  5. Review
  6. Article
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  11. Assessing the role of macular pigment optical volume in non-neovascular age-related macular degeneration: associations with rod-mediated dark adaptation and disease progression.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Observational
  12. Article
  13. Article
  14. Article
  15. Article
  16. Visual Function Assessment in Geographic Atrophy: A Review.Clinical & experimental ophthalmology · 2026
    Review
  17. Article
  18. Article
  19. Article
  20. Article

92 more citing papers are in PubMed but not listed here.

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

8 authors at 1 institution in 1 country.

Cynthia OwsleyDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama. Electronic address: owsley@uab.edu.
Gerald McGwinDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama; Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama.
Mark E ClarkDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
Gregory R JacksonMacuLogix Inc., Hummelstown, Pennsylvania.
Michael A CallahanDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
Lanning B KlineDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
C Douglas WitherspoonDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
Christine A CurcioDepartment of Ophthalmology, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
University of Alabama at Birmingham · US

Funding

VISUAL DYSFUNCTION AND AGING--UNDERLYING MECHANISMSR01AG004212 · NIA · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI OWSLEY, CYNTHIA · 1985 to 2012
$3.7M
QUANTITATIVE ANAYLSIS OF AGING RETINAR01EY006109 · NEI · UNIVERSITY OF WASHINGTON · PI CURCIO, CHRISTINE A · 1986 to 2012
$3.5M
NEI NIH HHS R01 EY006109NEI NIH HHS R01EY06109NIA NIH HHS R01 AG004212NIA NIH HHS R01AG04212
6 · The paper itself

Abstract

purposeTo examine whether slowed rod-mediated dark adaptation (DA) in adults with normal macular health at baseline is associated with the incidence of age-related macular degeneration (AMD) 3 years later.

designProspective cohort.

participantsAdults aged ≥60 years were recruited from primary care ophthalmology clinics. Both eyes were required to be step 1 (normal) on the Age-Related Eye Disease Study 9-step AMD classification system based on color fundus photographs graded by experienced and masked evaluators.

methodsRod-mediated DA was assessed at baseline in 1 eye after a photobleach using a computerized dark adaptometer with targets centered at 5° on the inferior vertical meridian. Speed of DA was characterized by the rod-intercept value, with abnormal DA defined as rod-intercept ≥12.3 minutes. Demographic characteristics, best-corrected visual acuity, and smoking status were also assessed. Log-binomial regression was used to calculate unadjusted and adjusted risk ratios (RRs) and associated 95% confidence intervals (CIs) for the association between baseline DA and incident AMD.

main outcome measuresPresence of AMD at the 3-year follow-up visit for the eye tested for DA at baseline.

resultsBoth baseline and follow-up visits were completed by 325 persons (mean age, 67.8 years). At baseline, 263 participants had normal DA with mean rod-intercept of 9.1 (standard deviation [SD], 1.5), and 62 participants had abnormal DA with mean rod-intercept of 15.1 (SD, 4.0). After adjustment for age and smoking, those with abnormal DA in the tested eye at baseline were approximately 2 times more likely to have AMD in that eye (RR, 1.92; 95% CI, 1.03-3.62) by the time of the follow-up visit, compared with those who had normal DA at baseline.

conclusionsDelayed rod-mediated DA in older adults with normal macular health is associated with incident early AMD 3 years later, and thus is a functional biomarker for early disease. The biological relevance of this test is high, because it assesses translocation of vitamin A derivatives across the retinal pigment epithelium and Bruch's membrane, 2 tissues with prominent age- and AMD-related pathology.

Indexed as

BiomarkersAgedAged, 80 and overDark AdaptationEarly DiagnosisFemaleHumansMacular DegenerationMaleMiddle AgedProspective StudiesRetinal Rod Photoreceptor CellsVisual AcuityBiomarkers

Identifiers

PMID26522707
PMCPMC4724453
OpenAlexW1961778296

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

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.