The Ocular Lens and Cataract
Sol M. Michaelson, Sandra W. Magin · 1975
1975 review found microwaves produced cataracts in rabbits only through acute thermal insult at 100-150 mW/cm² for 60-100 minutes, and no proven human cases exist.
Plain English Summary
This 1975 conference paper by Michaelson and Magin reviewed experimental and clinical evidence on microwave exposure and cataract development in the eye's lens. In rabbits, acute thermal insult from high-intensity microwave fields (100-150 mW/cm² for 60-100 minutes) was cataractogenic if intraocular temperatures reached 45-55°C, and no proven cases of human cataracts caused by microwave radiation exist.
Why This Matters
Michaelson's 1975 review notes that of all the real or alleged effects of microwave exposure in man in the Western Hemisphere, cataract production appears to have created the greatest interest and has become the most confusing and controversial. It reports that no cumulative effect was observed from repeated sub-threshold exposures, and that no cataracts were produced by 100 mW/cm² for 2 hours/day for 8-9 days.
There is no clinical or experimental evidence that lens damage due to microwave energy is morphologically different from lens abnormalities from other causes, including aging. Studies at 918 MHz and 3000 MHz showed no evidence of cataract formation at tested power densities.
Figures from the Original Paper
Diagrams extracted from the original research document.
Exposure Details
- Power Density
- 100 mW/cm²
- Exposure Duration
- 2 hours/day for 8-9 days
Exposure Context
This study used 100 mW/cm² for radio frequency:
- 10,000Mx above the Building Biology guideline of 0.1 μW/m²
- 166.7Mx above the BioInitiative Report recommendation of 0.0006 μW/cm²
Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.
Where This Falls on the Concern Scale
Study Details
To analyze the relationship between microwave exposure and cataract development, examining both experimental and clinical evidence to determine if microwave radiation causes distinct lens damage.
Review of experimental studies on microwave-induced cataracts in animals (particularly rabbits) and ...
Experimental studies in rabbits showed that acute thermal insult from high-intensity microwave field...
There is no clinical or experimental evidence that lens damage due to microwave energy is morphologically different from lens abnormalities from other causes, including aging. The idea that there is a microwave radiation signature on the lens has little support from evidence. No proven cases of human cataracts caused by microwave radiation exist.
Show BibTeX
@article{the_ocular_lens_and_cataract_g3722,
author = {Sol M. Michaelson and Sandra W. Magin},
title = {The Ocular Lens and Cataract},
year = {1975},
}