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Volume 13, Issue 3 (Iranian Journal of Ergonomics-In Press 2025)
Iran J Ergon 2025, 13(3): 0-0 |
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Ethics code: ir.umsu.rec.1403.120
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sharifi Z S, hemmatjo R, Ghahramani A. Evaluation of brightness and luminance intensity and its relationship with visual fatigue among users of video terminals at Tabriz University of Medical Sciences in 2024. Iran J Ergon 2025; 13 (3)
URL: http://journal.iehfs.ir/article-1-1095-en.html
URL: http://journal.iehfs.ir/article-1-1095-en.html
1- Department of Occupational Health, School of Health, Urmia University of Medical Sciences, Urmia, Iran
2- Department of Occupational Health, School of Health, Urmia University of Medical Sciences, Urmia, Iran ,R.hemmatjo@yahoo.com
2- Department of Occupational Health, School of Health, Urmia University of Medical Sciences, Urmia, Iran ,
Abstract: (118 Views)
Background and Objectives: Nowadays, electronic devices such as computers, mobile phones, and tablets have played an important role in people's work and lives, and the main complaint of users of video terminals is eye symptoms caused by them. This study aimed to evaluate the intensity of lighting and brightness and its possible relationship with visual fatigue in users of video terminals at Tabriz University of Medical Sciences.
Methods: This cross-sectional study was conducted on 171 users of video terminals at Tabriz University of Medical Sciences. In this study, the local illuminance intensity at the work surface and the luminance intensity from the screen at the user's eye level were measured. A 15-question visual fatigue questionnaire was used to assess visual fatigue. The results were analyzed using paired t-tests and chi-square tests using SPSS software.
Results: In this study, the average local illumination intensity on the desk was 306.6 lux and the average luminance intensity was 73.9 candelas per square meter. Local illumination intensity was lower than the recommended level in 41.6 percent of cases. There was no statistically significant relationship between illumination intensity and users' vision during the study, and there was also no statistically significant relationship between users' luminance and vision. The results of this study showed that vision at the end of the work has a significant relationship with the individual's vision at the beginning of the work. The results of this study also showed that there is a significant relationship between visual fatigue and the type of work.
Conclusion: According to the findings of the study, it is recommended that, if possible, the time to start working with visual terminals should be when there is no feeling of visual fatigue. Also, since one of the factors affecting visual fatigue is the type of work, it is recommended that users manage their work in such a way that they are mostly inactive (reading the page).
Methods: This cross-sectional study was conducted on 171 users of video terminals at Tabriz University of Medical Sciences. In this study, the local illuminance intensity at the work surface and the luminance intensity from the screen at the user's eye level were measured. A 15-question visual fatigue questionnaire was used to assess visual fatigue. The results were analyzed using paired t-tests and chi-square tests using SPSS software.
Results: In this study, the average local illumination intensity on the desk was 306.6 lux and the average luminance intensity was 73.9 candelas per square meter. Local illumination intensity was lower than the recommended level in 41.6 percent of cases. There was no statistically significant relationship between illumination intensity and users' vision during the study, and there was also no statistically significant relationship between users' luminance and vision. The results of this study showed that vision at the end of the work has a significant relationship with the individual's vision at the beginning of the work. The results of this study also showed that there is a significant relationship between visual fatigue and the type of work.
Conclusion: According to the findings of the study, it is recommended that, if possible, the time to start working with visual terminals should be when there is no feeling of visual fatigue. Also, since one of the factors affecting visual fatigue is the type of work, it is recommended that users manage their work in such a way that they are mostly inactive (reading the page).
Type of Study: Research |
Subject:
Other Cases
Received: 2025/07/23 | Accepted: 2025/09/27 | ePublished: 2025/09/27
Received: 2025/07/23 | Accepted: 2025/09/27 | ePublished: 2025/09/27
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
