A Study of the Cataractogenic Effects of Microwave Radiation
S. W. Rosenthal, L. Birenbaum, G. M. Grosof, M. M. Zaret · 1967
1967 research showed 3.5 GHz microwave radiation can damage eye lenses, frequencies now common in 5G networks.
Plain English Summary
This 1967 study investigated whether 3.5 GHz microwave radiation could cause cataracts in animal eyes. Researchers chose to focus on the eye lens because it's particularly vulnerable to radiation damage and easy to examine. The study was conducted during an era when microwave safety standards varied wildly, with some differing by 1,000 times.
Why This Matters
This research represents a pivotal moment in microwave safety science. In 1967, researchers were already recognizing that microwave radiation could damage the delicate lens of the eye, yet safety standards were chaotic with some agencies allowing exposure levels 1,000 times higher than others. The 3.5 GHz frequency studied here falls within the range used by modern 5G networks and some WiFi systems. What makes this particularly relevant today is that our eyes are increasingly exposed to microwave radiation from multiple sources simultaneously. The researchers specifically noted their concern about rising power levels in microwave systems. Fast forward to today, and we're surrounded by microwave-emitting devices at power levels and frequencies that would have seemed unimaginable in 1967. The eye lens remains just as vulnerable now as it was then, yet our exposure has increased exponentially.
Finding
Sufficient data was obtained for both CW and pulsed exposures to define threshold curves indicating the boundary between regions yielding observable lens changes and those having no effect when observed in the post radiation period of 30 days. These curves show that, at the 1 watt level, injuries occurred for an exposure time of 40 minutes. Exposures at the 5 watt level resulted in no effect in more than 2 hours. There was no substantial difference between the effects of CW and pulsed power of the same average value.
In their words
“Sufficient data was obtained for both CW and pulsed exposures to define threshold curves indicating the boundary between regions yielding observable lens changes and those having no effect when observed in the post radiation period of 30 days. These curves show that, at the 1 watt level, injuries occurred for an exposure time of 40 minutes. Exposures at the 5 watt level resulted in no effect in more than 2 hours. There was no substantial difference between the effects of CW and pulsed power of the same average value.”
Exposure Information
Specific exposure levels were not quantified in this study.
Show BibTeX
@article{a_study_of_the_cataractogenic_effects_of_microwave_radiation_g4089,
author = {S. W. Rosenthal and L. Birenbaum and G. M. Grosof and M. M. Zaret},
title = {A Study of the Cataractogenic Effects of Microwave Radiation},
year = {1967},
}