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Volume 13, Issue 3 (Iranian Journal of Ergonomics 2025)
Iran J Ergon 2025, 13(3): 206-214 |
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Ethics code: IR.UMSU.REC.1403.120
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Sharifi Z S, Ghahramani A, Hemmatjoo R. Evaluation of Luminance and Illuminance and Their Relationship with Visual Fatigue among Users of Video Terminals at Tabriz University of Medical Sciences in 2024. Iran J Ergon 2025; 13 (3) :206-214
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: (3304 Views)
Objectives: Nowadays, electronic devices, such as computers, mobile phones, and tablets, have played a crucial role in people's work and lives. The main complaint of users of video terminals is eye symptoms caused by prolonged use. This study aimed to evaluate the intensity of luminance and illuminance and their possible relationship with visual fatigue in users of video terminals at Tabriz University of Medical Sciences.
Methods: This cross-sectional study included 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 (version.16).
Results: In this study, the average local illumination intensity on the desk was 306.6 lux, and the average luminance intensity was 73.9 cd/m2. The local illumination intensity was lower than the recommended level in 41.6% of the cases. No statistically significant relationship was observed between illumination intensity and users' visual fatigue during the study, nor between users' luminance and visual fatigue. The results of this study showed that visual fatigue at the end of the work significantly correlates with an individual's visual fatigue at the beginning of the work. The results of this study also showed a significant relationship between visual fatigue and the type of work.
Conclusion: The results of this study showed no relationship between luminance and illuminance intensity and visual fatigue. According to the findings of this 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 job in such a way that they are mostly inactive (reading the page).
Methods: This cross-sectional study included 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 (version.16).
Results: In this study, the average local illumination intensity on the desk was 306.6 lux, and the average luminance intensity was 73.9 cd/m2. The local illumination intensity was lower than the recommended level in 41.6% of the cases. No statistically significant relationship was observed between illumination intensity and users' visual fatigue during the study, nor between users' luminance and visual fatigue. The results of this study showed that visual fatigue at the end of the work significantly correlates with an individual's visual fatigue at the beginning of the work. The results of this study also showed a significant relationship between visual fatigue and the type of work.
Conclusion: The results of this study showed no relationship between luminance and illuminance intensity and visual fatigue. According to the findings of this 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 job in such a way that they are mostly inactive (reading the page).
Type of Study: Research |
Subject:
Other Cases
Received: 2025/07/23 | Accepted: 2025/10/19 | ePublished: 2025/12/21
Received: 2025/07/23 | Accepted: 2025/10/19 | ePublished: 2025/12/21
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