Evidence map›Paper›PMID 36529048›Full record

ArticleVision research2023

Limited bandwidth short-wavelength light produces slowly-developing myopia in tree shrews similar to human juvenile-onset myopia.

Safal Khanal, Thomas T Norton, Timothy J Gawne

Open access · greenAbstract read
In one paragraph

Article in Vision research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 9% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.

  1. Pooled it
  2. Baseline factors associated with myopia progression and axial elongation over 30 months in children 5 to 12 years of age.Optometry and vision science : official publication of the American Academy of Optometry · 2024
    Trial
  3. Measuring electroretinograms in tree shrews with a portable electrophysiology device.Documenta ophthalmologica. Advances in ophthalmology · 2026
    Article
  4. Article
  5. Next-Generation Myopia Control Spectacles Hint at Defocus Opponency Circuits in the Retina.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
    Article
  6. Article
  7. S-Cone Retinal Pathway Dysfunction in Myopia.Investigative ophthalmology & visual science · 2026
    Article
  8. Review
  9. Optical and Visual Diet in Myopia.Investigative ophthalmology & visual science · 2025
    Review
  10. How Have Animal Models Increased our Understanding of Human Myopia?Investigative ophthalmology & visual science · 2025
    Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. 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

3 authors at 1 institution in 1 country.

Safal KhanalDept. 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.
Timothy J GawneDept. of Optometry and Vision Science, University of Alabama at Birmingham (UAB), Birmingham, AL, United States. Electronic address: tgawne@gmail.com.
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
Effects of wavelength on achieving and maintaining emmetropiaR01EY028578 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI GAWNE, TIMOTHY J · 2018 to 2022
$1.9M
Myopia and the Visual EnvironmentR01EY036970 · NEI · UNIVERSITY OF ALABAMA AT BIRMINGHAM · PI TIMOTHY J GAWNE · 2025 to 2026
$989k
NEI NIH HHS P30 EY003039NEI NIH HHS R01 EY028578NEI NIH HHS R01 EY036970
6 · The paper itself

Abstract

During postnatal development, an emmetropization feedback mechanism uses visual cues to modulate the axial growth of eyes so that, with maturation, images of distant objects are in focus on the retina. If the visual cues indicate that the eye has become too long, it generates STOP signals that slow eye elongation. Myopia is a failure of this process where the eye becomes too long. The existing animal models of myopia have been essential in understanding the mechanics of emmetropization but use visual cues that lead to rapidly progressing myopia and don't match the stimuli that lead to human myopia. Form deprivation removes esssentially all spatial contrast. Minus lens wear accurately guides axial elongation to restore sharp focus: technically it is not a model of myopia! In contrast, childhood myopia involves a slow drift into myopia, even with the presence of clear images. We hypothesize that, in the modern visual environment, STOP signals are present but often are not quite strong enough to prevent myopic progression. Using tree shrews, small diurnal mammals closely related to primates, we have developed an animal model that we propose better represents this situation. We used limited bandwidth light to provide limited chromatic cues for emmetropization that are not quite enough to produce fully effective STOP signaling, resulting in a slow drift into myopia as seen in children. We hypothesize that this animal model of myopia may prove useful in evaluating anti-myopia therapies where form deprivation and minus lens wear would be too powerful.

Indexed as

MyopiaTupaiaAnimalsChildDisease Models, AnimalEyeHumansRefraction, OcularRetinaTupaiidaeAnimal modelsChromatic aberrationEmmetropizationMyopiaRefractive errorWavelength

Identifiers

PMID36529048
PMCPMC9974583
OpenAlexW4311927536

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.