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The Impact of Subliminal Flicker Sensitivity on Workplace Health

This study explores the adverse effects of subliminal flicker in the workplace, including headaches, stress, and CNS arousal. Findings suggest that flicker elimination can reduce stress and benefit individuals with high CFF sensitivity. The research examines flicker's role in building-related symptoms and suggests implications for health and safety measures. Analyzing CFF measurements, physical illuminance, and individual experiences, the study highlights the importance of addressing subliminal flicker to enhance workplace well-being.

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The Impact of Subliminal Flicker Sensitivity on Workplace Health

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  1. Sensitivity for subliminal flicker

  2. Adverse effects of subliminal flicker • Headache • Stress • Arousal of CNS

  3. Hypotheses • Flicker elimination with HF-ballasts has a stress reducing effect • Flicker reduction is also beneficial for those who describe other kinds of building- and work-place related symptoms • Individuals with high CFF is more sensitive than others

  4. Yr 1 Yr 2 O2 O1 X Change of tubes Y Measurement CFF

  5. Measurements Physical Illuminance Luminance Electrical and magnetic fields Individual Experience of the work environment Complaints Personality CFF

  6. Experimental group 3 work places 7 men 35 women Mean age 47 years Control group 7 work places 150 men 140 women Mean age 46 years Subjects

  7. RESULTS

  8. Conclusions • Subliminal flicker causes stress and eye-problems at the work place • There is a tendency toward the existence of a more sensititve group • Flicker maybe a component in the so-called Sick Building Syndrome • More knowledge about the mechanisms causing the effects

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