Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
Nonionizing electromagnetic radiation associated with video-display terminals
No Effects Found
R. C. Petersen, M. M. Weiss, G. Minneci · 1980
1980 testing found VDT electromagnetic emissions far below safety standards, with user symptoms traced to lighting and ergonomics, not radiation.
Plain English Summary
Summary written for general audiences
This 1980 study measured electromagnetic emissions from video display terminals (VDTs) across frequencies from 10kHz to 18GHz to investigate health concerns like 'editor's cataract.' Researchers found emission levels far below safety standards and concluded VDTs pose no electromagnetic health risks. Eye strain and fatigue were attributed to lighting, glare, and ergonomic factors rather than radiation.
Cite This Study
R. C. Petersen, M. M. Weiss, G. Minneci (1980). Nonionizing electromagnetic radiation associated with video-display terminals.
Show BibTeX
@article{nonionizing_electromagnetic_radiation_associated_with_video_display_terminals_g6246,
author = {R. C. Petersen and M. M. Weiss and G. Minneci},
title = {Nonionizing electromagnetic radiation associated with video-display terminals},
year = {1980},
}Quick Questions About This Study
No detectable electromagnetic energy at microwave frequencies (above 1GHz) was found that could be directly associated with any video display terminal tested in this comprehensive study.
Researchers examined a broad spectrum from 10kHz to 18GHz, plus optical wavelengths from 200 to 800 nanometers, covering virtually all electromagnetic emissions from the terminals.
No, emission levels didn't even remotely approach any exposure standards used in the United States or other nations, indicating a very large safety margin.
Symptoms were traced to environmental factors like ambient lighting, glare, poor brightness and contrast, extended viewing time, poor posture, and job motivation levels rather than electromagnetic emissions.
Even when researchers adjusted all controls to try maximizing emissions, the detected sweep frequencies and digital clock harmonics remained far below any safety concerns.