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Long-term effects on symptoms by reducing electric fields from visual display units.

G Oftedal1, A Nyvang, B E Moen

  • 1SINTEF Unimed, Trondheim, Norway. gunnhild.oftedal@phys.ntnu.no

Scandinavian Journal of Work, Environment & Health
|November 24, 1999
PubMed
Summary

This study investigated if reducing electric fields from visual display units (VDUs) alleviates skin, eye, and nervous system symptoms. Results indicate that while filters reduced symptoms, the effect was not linked to electric field reduction, questioning the initial hypothesis.

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Area of Science:

  • Occupational health
  • Human-computer interaction
  • Environmental health

Background:

  • Previous research suggested reducing electric fields from visual display units (VDUs) could alleviate skin symptoms.
  • The potential impact of VDU electric fields on eye and nervous system symptoms remained less understood.

Purpose of the Study:

  • To replicate findings on VDU electric field reduction and skin symptom improvement.
  • To investigate if reducing VDU electric fields impacts eye and nervous system symptoms.

Main Methods:

  • A controlled, double-blind intervention study involving 42 participants.
  • Participants used electric-conducting screen filters, alternating between active (field-reducing) and inactive (non-field-reducing) filters.
  • Symptom severity was compared across periods with no filter, inactive filters, and active filters.

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Main Results:

  • A statistically significant reduction in most symptoms was observed when using filters compared to no filter.
  • No significant difference in symptom severity was found between active and inactive filter periods.
  • Observed symptom reduction may be attributable to visual or psychological effects, not electric field reduction.

Conclusions:

  • The study does not support the hypothesis that reducing VDU electric fields alleviates skin, eye, or nervous system symptoms.
  • The observed symptom reduction with filters is likely due to factors other than electric field mitigation.