Evidence map›Paper›PMID 35067020›Full record

ArticleKorean journal of ophthalmology : KJO2022

Effect of Classroom Illuminance on the Development and Progression of Myopia in School Children.

Young-Woo Suh, Suk-Gyu Ha, Seung-Hyun Kim

Abstract read
In one paragraph

Article in Korean journal of ophthalmology : KJO, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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, 2 syntheses or guidelines pooled it.

  1. [Optimization of Comprehensive Prevention and Control Strategies for Myopia From the Persepctive of the Social Ecological Systems Theory].Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition · 2025
    Pooled it
  2. Pooled it
  3. Effect of full spectrum indoor lighting on myopia progression in school-aged children: a prospective cohort study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Article
  4. Review
  5. Review
  6. Article
  7. Influence of light on myopia-a review.International journal of ophthalmology · 2026
    Review
  8. Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Measuring the visual environment of children and young people at risk of myopia: a scoping review.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  14. Article
  15. The influence of the environment and lifestyle on myopia.Journal of physiological anthropology · 2024
    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

3 authors.

Young-Woo SuhDepartment of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
Suk-Gyu HaDepartment of Ophthalmology, Korea University College of Medicine, Seoul, Korea.
Seung-Hyun KimDepartment of Ophthalmology, Korea University College of Medicine, Seoul, Korea.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo evaluate the effect of classroom illuminance on the development and progression of myopia in elementary school children.

methodsThe daylight factor, a ratio of inside and outside illuminance, was obtained in 50 elementary schools. The firstgrade students in the school with the lowest daylight (LD) factor (LD school, 145 subjects; 0.51%) and with the highest daylight (HD) factor (HD school, 147 subjects; 13.35%) were selected. A survey was conducted to evaluate parental myopia, the amount of near-work and outdoor activities. The refractive error and axial length (AL) were measured at initial and after 6 months. The spherical equivalent, AL, and the survey results were compared between the two schools. The mean AL of the emmetropic children was obtained, and all subjects were divided into two groups, more and less than mean AL. Changes in refractive errors and AL were also compared according to AL.

resultsThe amount of change in spherical equivalent and AL after 6 months were not different between the two schools. Initial prevalence of myopia was high in the HD school. However, it became similar between the two schools after 6 months. The mean AL of 155 emmetropic children was 22.7 ± 0.63 mm. In the 185 children with AL ≥22.7 mm, there was no difference in the AL change between the two schools. However, the change in AL in 107 children with AL <22.7 mm was significantly larger in the LD school (0.19 mm) than that in the HD school (0.15 mm, p = 0.049). Parental myopia, near-work and outdoor activities were not different between the two schools.

conclusionsHigh classroom illuminance during the day reduced axial elongation in eyes of children with a shorter AL. Increase in classroom light level by permitting more sunlight can be a protective measure against the development of myopia.

Indexed as

MyopiaRefractive ErrorsChildEyeHumansRefraction, OcularSchoolsChild healthMyopiaOcular visionPublic health

Identifiers

PMID35067020
PMCPMC9194730

What OpenQuestion holds

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LicenceCC BY-NC
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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.