Volume 7, Issue 4 (12-2011)
J Health Syst Res 2011, 7(4): 0-0 |
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Habibi E, Pourabdian S, Rajabi H, Dehghan H, Maracy M R. Development and Validation of a Visual Fatigue Questionnaire for
Video Display Terminal Users. J Health Syst Res 2011; 7 (4)
URL: http://hsr.mui.ac.ir/article-1-260-en.html
URL: http://hsr.mui.ac.ir/article-1-260-en.html
Ehasanollah Habibi 
1, Siamak Pourabdian2 , Hasan Rajabi3 , Habibollah Dehghan4 , Mohammad Reza Maracy5
1, Siamak Pourabdian2 , Hasan Rajabi3 , Habibollah Dehghan4 , Mohammad Reza Maracy5
1- Associate Professor, Faculty Member, Department of Occupational Health, School of Health, Isfahan University of Medical Science, Isfahan, Iran
2- Assistant Professor, Faculty Member, Department of Occupational Health, School of Health, Isfahan University of Medical Science, Isfahan, Iran.
3- MSc Student, Student Research Committee, Department of Professional Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
4- Lecturer, Department of Professional Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
5- Associate Professor, Faculty Member, Department of Epidemiology and Statistics, School of Health, Isfahan University of Medical Science, Isfahan, Iran
2- Assistant Professor, Faculty Member, Department of Occupational Health, School of Health, Isfahan University of Medical Science, Isfahan, Iran.
3- MSc Student, Student Research Committee, Department of Professional Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
4- Lecturer, Department of Professional Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
5- Associate Professor, Faculty Member, Department of Epidemiology and Statistics, School of Health, Isfahan University of Medical Science, Isfahan, Iran
Abstract: (1257 Views)
Background: Technology- related tools, including computers and video display terminals (VDTs), are rapidly expanding as a result of the quick growth of technology itself. Investigation on the complaints of VDT users reported visual discomfort. This study aimed to design an appropriate tool to assess visual fatigue of VDT users. Methods: This cross-sectional study was performed on 248 VDT users in different professions during 2011. After reading books, articles, and similar questionnaires, question banks were provided and an initial questionnaire was developed. Validity and reliability of the questionnaire were evaluated by Cronbach's alpha coefficient and content validity index (CVI). A theoretical model based on four categories of symptoms of visual fatigue, extracted from previous studies, was designed. AMOS software was used to assess the validity of its constructs using confirmatory factor analysis and fitted parameters. Using the SPSS18, internal correlation coefficients of the domains were calculated. In order to investigate the reliability and grade the final scores of the questionnaire, visual fatigue was simultaneously assessed by the questionnaire and the VFM-90.1 device and the results were compared. In addition, cutting points were determined by the ROC curve. Findings: A minimum CVI of 0.75, reliability coefficient of 0.755, model fit indices of RMSEA = 0.026, GFI = 0.96 and AGFI = 0.92 were found. The correlation between the results measured with a questionnaire and VFM-90.1 was -0.87 and the cut-off points were calculated as 0.65, 2.36 and 3.88. Four main domains of the questionnaire, including eye strain (4 questions), visual impairment (5 questions), surface-related impairments of the eye (3 questions) and problems outside the eye (3 questions), were approved. Conclusions: The questionnaire contained 15 questions to assess visual fatigue. It had excellent reliability and validity. Therefore, VDT users can easily assess their extent and level of visual fatigue by this relatively short and simple questionnaire.
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2011/12/15 | Published: 2011/12/15
Received: 2020/07/16 | Accepted: 2011/12/15 | Published: 2011/12/15
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