Annals of Occupational and Environmental Medicine

Research Article

The effect of increasing the illumination on operators’ visual performance in the control-room of a combined cycle power plant: Seyyed Abolfazl Zakerian, Saeid Yazdanirad, Seifollah Gharib, Kamal Azam, Asma Zare; Ann Occup Environ Med 2018;30:56. Published online August 29, 2018; DOI: https://doi.org/10.1186/s40557-018-0267-3

Background

Lighting is one of the environmental factors affecting the performance of the control room operators. Therefore, the aim of this study was to compare the control room operators’ visual performance in two different illumination conditions at a combined cycle power plant through field-work.

Methods

Sixteen operators in day shift were evaluated with the Freiburg Visual Acuity test (FrACT) software at two lighting systems with different intensities. It includes the first phase with fluorescent illumination system (Power: 40 W, Color Temperature: 4000 Kelvin, Luminous Flux: 2780 Lumen and Model: Pars Shahab) and the second phase with a combined illumination system includes fluorescent and LED (Power: 48 W, Color Temperature: 4000 Kelvin, Luminous Flux: 5400 Lumen and Model: Mazinoor).

Results

Based on the results, visual performance index and visual acuity significantly increased after the intervention (p < 0.001). As to contrast, more lighting significantly reduced the percentage of recognized contrast (p < 0.001) and increased the contrast performance index (p < 0.001).

Conclusions

The results of this study showed that increasing the intensity of light from the values below the allowable limit to the values above the allowable limit would increase the visual indicators in individuals.

Citations

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Randomized trial comparing the effects of a 3D head-up system and microscope eyepiece-assisted simulated vitrectomy with intraocular illumination on the ocular surface of an operator
Xing Ge, Dandan Liu, Fangfang Fan, Tengyu Xu, Zhengpei Zhang, Haiyang Liu, Suyan Li
BMC Ophthalmology.2024;[Epub] CrossRef
Validity and reliability of Farsi version of office lighting survey Questionnaire (OLS)
Mohammad Javad Sheikhmozafari, Omran Ahmadi
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The simultaneous effect of ambient temperature and light intensity on performance: A cross-sectional study
Mahdi Malakoutikhah, Hadiseh Rabiei, Asma Zare, Amir Omidvar
International Archives of Health Sciences.2021; 8(3): 170. CrossRef
An empirical regression model toward optimized ergonomic conditions for monitoring room operators using RSM
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Association Between Lighting Level to Subjective Complaints of Visual Fatigue on Operators in the Auto Welder Section
Edza Aria Wikurendra, Muhammad Shafly Rabbani, Globila Nurika
The Indonesian Journal Of Occupational Safety and Health.2021; 10(2): 218. CrossRef
Selecting lighting system based on workers’ cognitive performance using fuzzy best–worst method and QUALIFLEX
Asma Zare, Mahdi Malakoutikhah, Moslem Alimohammadlou
Cognition, Technology & Work.2020; 22(3): 641. CrossRef

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Original Article

Change of Visual Function and Lacrimation Among Male Near-Work Inspectors in a TV Manufacturing Plant: Seong Ah Kim, Byung Yeol Chun, Sang Woo Kim, Sang Jae Jung, Gwang Ja Lee; Korean Journal of Occupational and Environmental Medicine 2001;13(4):436-448. Published online December 31, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.4.436

Abstract PDF

OBJECTIVES
The aim of this field-based longitudinal study was to investigate the effects of near-work on lacrimation and visual function, particularly refractive power.
METHODS
Our study tracked sixty five male workers for about three years by means of ophthalmologic examinations and questionnaires, to collect data including eye symptoms and subjective work environmental factors. Ophthalmic examinations included visual acuity, Shirmer I test, and autorefractometry. In the first year, the inclusion criteria were ages less than 40 years, no history of ophthalmic diseases, emmetropia(-1.0 RESULTS
Over a period of 32 months, spherical equivalents were decreased as much as 0.18D(diopter) for LE(left eye) and 0.18D for RE(right eye). Lacrimation by Shirmer's I test during 20 months were decreased as much as 6.57 mm/5min for LE, and 6.40 mm/5min for RE. Although more myopic-changed workers demonstrated young age(<30 years) and short work duration(<2 years), there was no significance to this correlation. Additionaly, subjective work environmental factors such as poor illumination, noise, uncomfortable air and daily use of VDT and/or TV were shown to have no significant effect. However, as for eye discomfort, which was reconstructed from several dry eye symptoms, the daily use of VDT and/or TV was a significant variable. According to a logistic regression analysis concerning the effects of refractive power, lacrimation, work duration, poor illumination, and daily use of VDT and/or TV on eye discomfort, only daily use of VDT and/or TV greater than 4 hours displayed OR of 10.5.
CONCLUSIONS
Myopic changes due to near work were not observed, however lacrimal function was changed in workers. These results suggest that we should consider various factors such as lacrimation, tear film and refraction as well as visual acuity in order to establish an eye care program among near-work performing employees.

Citations

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An automatic defect-inspection method for optical isolators using image analysis
Tian Qiu, Zhiquan Lin, Chen Jung Tsai, Chi Shing Wong, Xin Zhang, Shuaiqi Liu, Honglong Ning
at - Automatisierungstechnik.2022; 70(7): 662. CrossRef
Relationship between occupational injuries and the provision of safety and health information: data from the 4th Korean working conditions survey
Ju-il Seo, Gab-Sik Shin, Min Gi Kim, Young-Sun Min
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef

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