Evidence map›Paper›PMID 34067888›Full record

ArticleInternational journal of environmental research and public health2021

Impact of COVID-19 Home Confinement in Children's Refractive Errors.

Cristina Alvarez-Peregrina, Clara Martinez-Perez, Cesar Villa-Collar, Cristina Andreu-Vázquez, Alicia Ruiz-Pomeda, Miguel Ángel Sánchez-Tena

Open access · goldAbstract read
In one paragraph

Article in International journal of environmental research and public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 6 pooled it
10.1field-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.

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

35 citing papers in PubMed, 6 syntheses or guidelines pooled it, 73 citations in OpenAlex.

  1. Analysing myopia in Europe: A comprehensive meta-analysis.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2026
    Pooled it
  2. Efficacy of spectacle lenses specifically designed for myopia control: systematic review and meta-analysis.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Pooled it
  3. Pooled it
  4. Pooled it
  5. Coronavirus disease 2019 outbreak and associated public health measures increase the progression of myopia among children and adolescents: Evidence synthesis.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2022
    Pooled it
  6. Pooled it
  7. Review
  8. [A population-based survey of myopia on primary school students in an administrative district, 2019 to 2024].Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences · 2026
    Article
  9. Article
  10. IMI-2025 Digest.Investigative ophthalmology & visual science · 2025
    Article
  11. Increasing myopia in Scotland at age of 3.5-5.5 years: A retrospective epidemiological study.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025
    Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Myopia progression in school children with prolonged screen time during the coronavirus disease confinement.Medical hypothesis, discovery & innovation ophthalmology journal · 2023
    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

6 authors at 3 institutions in 2 countries.

Cristina Alvarez-PeregrinaFaculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain.ORCID 0000-0003-1097-4581
Clara Martinez-PerezInstituto Superior de Educação e Ciências, ISEC LISBOA, 1750-179 Lisboa, Portugal.ORCID 0000-0002-0996-5007
Cesar Villa-CollarFaculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain.ORCID 0000-0002-6743-8264
Cristina Andreu-VázquezFaculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain.ORCID 0000-0002-7558-4325
Alicia Ruiz-PomedaOphthalmology Department, Hospital Universitario de Móstoles, 28935 Madrid, Spain.
Miguel Ángel Sánchez-TenaFaculty of Biomedical and Health Sciences, Universidad Europea de Madrid, 28670 Madrid, Spain.ORCID 0000-0002-2583-1789
Universidad Europea de Madrid · ESInstituto Superior de Educação e Ciências · PTHospital Universitario de Móstoles · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMyopia is a public health problem, with estimations that 50% of the world population will be myopic by 2050. Some environmental factors, such as time spent outdoors, doing near work, and using digital devices, influence the development of myopia in children. Home confinement in Spain has increased these risk factors, so this study aims to investigate the impact of home confinement during the COVID-19 outbreak in the vision of school-aged children; Methods: A cross-sectional study in children between 5 and 7 years old that completed a visual screening and a questionnaire about their lifestyles at opticians in Spain in September and October of 2019 and 2020. Statistical analysis to compare lifestyles pre and post confinement, and vision in 2020 versus a similar cohort examined at the same opticians in 2019, was conducted; Results: Spanish children spent less time outdoors and more time doing near work in 2020 than in 2019 (

Indexed as

COVID-19ChildChild, PreschoolCross-Sectional StudiesHumansRefraction, OcularSARS-CoV-2SpainSurveys and QuestionnaireschildrenCOVID-19home confinementlifestylesmyopiaoutdoors activitySARS-CoV-2screen-timevision

Identifiers

PMID34067888
PMCPMC8156137
OpenAlexW3163559780

What OpenQuestion holds

Textmetadata
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 OpenQuestion graph.