RESUMO
Perception is an active process of receiving, analysing and interpreting visual information coming for the environment. Particularly, in occupational activities which require great visual efficiency, obtaining of proper visual information, determined by a correct process of perception is extremely important. An optimal lightening of the workpost is one of the essential factors determining correct perception. However, various parameters of the luminous environment may have a negative effect on visual processes. Painful dazzle belongs to one of them. It is claimed by workers as the feeling of annoyance, lack of concentration and visual discomfort. The work presented proves a possible negative effect of painful dazzle on the perception process, and consequently on the occupational performance and even on workers health.
Assuntos
Luz/efeitos adversos , Iluminação , Exposição Ocupacional , Visão Ocular/fisiologia , Percepção Visual/fisiologia , Adaptação Fisiológica , Monitoramento Ambiental , HumanosRESUMO
Video display terminals (VDTs) pose to these operating then professionally risks resulting from optical properties of the screen, lighting conditions and organization of VDT workplaces. The latest Polish VDTs have been tested to determine their ultraviolet and infrared radiation, screen luminance depth and light reflection factors of the casing, key-buttons and documents serving as information sources. The ultraviolet and infrared radiation did not reach a health-hazardous level, however the light reflection factors were highly differentiated and showed unsuitable distribution inside the operator's visual field; the luminance pulsation of the screen exhibits a considerable depth. The findings promoted defining some rules of the proper use of VDTs.
