Evidence map›Paper›PMID 35409679›Full record

ArticleInternational journal of environmental research and public health2022

Self-Reported Computer Vision Syndrome among Thai University Students in Virtual Classrooms during the COVID-19 Pandemic: Prevalence and Associated Factors.

Kampanat Wangsan, Phit Upaphong, Pheerasak Assavanopakun, Ratana Sapbamrer, Wachiranun Sirikul, Amornphat Kitro, Naphasorn Sirimaharaj, Sawita Kuanprasert, Maneekarn Saenpo, Suchada Saetiao and 1 more

Abstract read
In one paragraph

Article in International journal of environmental research and public health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 3 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

24 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Immediate Effects of Light Mode and Dark Mode Features on Visual Fatigue in Tablet Users.International journal of environmental research and public health · 2025
    Trial
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  20. Digital Eye Strain among Peruvian Nursing Students: Prevalence and Associated Factors.International journal of environmental research and public health · 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

11 authors.

Kampanat WangsanDepartment of Community Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.ORCID 0000-0002-4657-4515
Phit UpaphongDepartment of Ophthalmology, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.ORCID 0000-0001-8590-8568
Pheerasak AssavanopakunDepartment of Community Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
Ratana SapbamrerDepartment of Community Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.ORCID 0000-0003-0379-2798
Wachiranun SirikulDepartment of Community Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.ORCID 0000-0002-9183-4582
Amornphat KitroDepartment of Community Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
Naphasorn SirimaharajFaculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
Sawita KuanprasertFaculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
Maneekarn SaenpoFaculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
Suchada SaetiaoFaculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
Thitichaya KhamphichaiFaculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

During the COVID-19 pandemic, computer vision syndrome (CVS) related to online classrooms were unavoidable. This cross-sectional study aimed to explore the prevalence, characteristics and associated factors of CVS. A total of 527 students who were currently studying in a virtual classroom (70.40% female, mean (standard deviation; SD) age of 20.04 (2.17) years) were included. The prevalence of CVS assessed by an online CVS-Questionnaire was 81.0% (427/527). Comparing with those in the period before the online study, an increase in screen time (interquartile range) in students with and without CVS was 3 (0−3) and 2 (1−5) h, respectively. Overall, 516 students (97.9%) experienced at least one symptom. The most frequent symptom in CVS subjects was eye pain (96.5%). The most intense symptoms were the feeling of worsening eyesight (15.9%). The factors associated with CVS were female (p < 0.001), age (p = 0.010), atopic diseases (p = 0.020), prior ocular symptoms (p < 0.001), astigmatism (p = 0.033), distance from display <20 cm (p = 0.023), presence of glare or reflection on screen (p < 0.001), low screen brightness (p = 0.045), sleep duration (p = 0.030), inadequate break time between classes (p < 0.001) and increased screen time usage during online study (p < 0.001). Recommendations to prevent CVS based on the adjustable factors might reduce the burden of online study.

Indexed as

AsthenopiaCOVID-19AdultComputersCross-Sectional StudiesFemaleHumansMalePandemicsPrevalenceSelf ReportStudentsSyndromeThailandUniversitiesYoung Adultcomputer vison syndromeCOVID-19 impactdigital eye straindigital screenonline studyvideo display terminalvirtual classroomvisual display terminal

Identifiers

PMID35409679
PMCPMC8997620

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.