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
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
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.
Why This Matters
This early study represents a critical moment in EMF health research when computer terminals first entered workplaces en masse. While the findings showed emissions well below safety standards, the research highlights how new technologies consistently trigger health concerns that require scientific investigation. The reality is that VDTs from 1980 operated very differently from today's LED monitors and wireless devices. What's particularly relevant today is the study's methodology of testing across such a broad frequency spectrum (10kHz to 18GHz) and the acknowledgment that user symptoms were real, even if not electromagnetically caused. This demonstrates the importance of distinguishing between legitimate EMF concerns and other environmental factors that can affect health and comfort in our increasingly electronic world.
Finding
In all cases, the sweep frequencies and their first fifty or so harmonics, and the digital clock frequencies and their harmonics were detected but in no case did the individual levels or the sum of all levels even remotely approach any exposure standards or guidelines used in the United States or by any other nation. No levels of electromagnetic energy at frequencies normally considered microwave (greater than 1GHz) were detected that could be directly associated with any terminal.
In their words
“In all cases, the sweep frequencies and their first fifty or so harmonics, and the digital clock frequencies and their harmonics were detected but in no case did the individual levels or the sum of all levels even remotely approach any exposure standards or guidelines used in the United States or by any other nation. No levels of electromagnetic energy at frequencies normally considered microwave (greater than 1GHz) were detected that could be directly associated with any terminal.”
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},
}