Evidence map›Paper›PMID 28801261›Full record

ArticleVision research2017

Long-wavelength (red) light produces hyperopia in juvenile and adolescent tree shrews.

Timothy J Gawne, Alexander H Ward, Thomas T Norton

Open access · greenAbstract read
In one paragraph

Article in Vision research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed, 2 pooled it
4.8field-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

79 citing papers in PubMed, 2 syntheses or guidelines pooled it, 137 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Acute Ocular Effects of Violet and Red Light Exposure in Young Adults.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  4. Article
  5. Article
  6. Article
  7. S-Cone Retinal Pathway Dysfunction in Myopia.Investigative ophthalmology & visual science · 2026
    Article
  8. Review
  9. Interaction Between Near Work and Narrowband Light on Choroidal Thickness.Investigative ophthalmology & visual science · 2026
    Article
  10. Article
  11. Review
  12. Radiometric and safety assessment of a 'low-level red-light' myopia control device.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025
    Article
  13. Article
  14. Review
  15. Article
  16. Review
  17. How Have Animal Models Increased our Understanding of Human Myopia?Investigative ophthalmology & visual science · 2025
    Review
  18. Article
  19. Article
  20. Red light instruments for myopia exceed safety limits.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2024
    Article

19 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

3 authors at 1 institution in 1 country.

Timothy J GawneDept. of Optometry and Vision Science, University of Alabama at Birmingham (UAB), Birmingham, AL, United States. Electronic address: tgawne@gmail.com.
Alexander H WardDept. of Optometry and Vision Science, University of Alabama at Birmingham (UAB), Birmingham, AL, United States.
Thomas T NortonDept. of Optometry and Vision Science, University of Alabama at Birmingham (UAB), Birmingham, AL, United States.
University of Alabama at Birmingham · US

Funding

Visual Phenotyping CoreP30EY003039 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI Paul Douglas Gamlin · 1985 to 2026
$16.9M
Control of refractive development with temporally modulated lightR21EY025254 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI GAWNE, TIMOTHY J · 2016 to 2017
$404k
NEI NIH HHS P30 EY003039NEI NIH HHS R21 EY025254
6 · The paper itself

Abstract

In infant tree shrews, exposure to narrow-band long-wavelength (red) light, that stimulates long-wavelength sensitive cones almost exclusively, slows axial elongation and produces hyperopia. We asked if red light produces hyperopia in juvenile and adolescent animals, ages when plus lenses are ineffective. Animals were raised in fluorescent colony lighting (100-300 lux) until they began 13days of red-light treatment at 11 (n=5, "infant"), 35 (n=5, "juvenile") or 95 (n=5, "adolescent") days of visual experience (DVE). LEDs provided 527-749 lux on the cage floor. To control for the higher red illuminance, a fluorescent control group (n=5) of juvenile (35 DVE) animals was exposed to ∼975 lux. Refractions were measured daily; ocular component dimensions at the start and end of treatment and end of recovery in colony lighting. These groups were compared with normals (n=7). In red light, the refractive state of both juvenile and adolescent animals became significantly (P<0.05) hyperopic: juvenile 3.9±1.0 diopters (D, mean±SEM) vs. normal 0.8±0.1D; adolescent 1.6±0.2D vs. normal 0.4±0.1D. The fluorescent control group refractions (0.6±0.3D) were normal. In red-treated juveniles the vitreous chamber was significantly smaller than normal (P<0.05): juvenile 2.67±0.03mmvs. normal 2.75±0.02mm. The choroid was also significantly thicker: juvenile 77±4μmvs. normal 57±3μm (P<0.05). Although plus lenses do not restrain eye growth in juvenile tree shrews, the red light-induced slowed growth and hyperopia in juvenile and adolescent tree shrews demonstrates that the emmetropization mechanism is still capable of restraining eye growth at these ages.

Indexed as

AgingAnimalsAxial Length, EyeEmmetropiaEyeHyperopiaLightRetinaTupaiidaeAnimal modelsEmmetropizationLongitudinal chromatic aberrationMyopiaRefractionWavelength

Identifiers

PMID28801261
PMCPMC5723538
OpenAlexW2748673819

What OpenQuestion holds

Textmetadata
LicenceTDM
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.