Lighting Assessment and Effects on Visual Fatigue and Psychological Status of Employees in Damghan Velayat Hospital Wards

Authors
Maryam Farokhzad
Alireza Dehdashti
Farhad Tajik
Abstract
Introduction and Aims

Insufficient lighting as a physical stressor in work environment may impact on work performance and cause work–related accidents. This study assessed the illumination and the probable effects on visual fatigue and mental states in Velaiat hospital’s personnel of Damghan.

Materials and Methods

A case study design performed in indoor hospital working areas. Layout and type of luminaires were examined and interior illuminations were measured as proposed by IESNA (Illuminating Engineering Society of North America). A questionnaire was used to collect data and descriptive and analytical statistical analyses were conducted.

Results

Interior lighting measurements showed unacceptable levels of local illumination in 82.3 percent of sections during day light hours and all sections during night hours. General levels of illumination were unacceptable for 83.3 percent of section in day light and all sections in night hours. Uniformity ratios were unacceptable during day and night hours for 91 percent and 83 percent of sections, respectively. There is a significant relation between age and perceived favorable light, visual fatigue and mental states (P < 0.05). We found significant relationships between the lighting type and illumination with visual fatigue and mental states (P < 0.05).

Conclusion

Insufficient illumination and excessive artificial light may lead to visual fatigue and mental strain. Lighting design should account for acceptable quantity and similarity to daylight.



* Corresponding Author: Research Center for Social Determinants of health, Semnan University of Medical Sciences.

Email: Dehdashti@semums.ac.ir
Keywords
Illumination
Hospital
Visual Fatigue
Mental States
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