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Experimental radiation cataracts induced by microwave radiation

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Russell L. Carpenter, David L. Biddle, B.S., Claire Van Ummersen, B.S., Cayetano P. Vlamalas, M.D., Hal Freeman, M.D. · 1959

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Rabbits exposed to 2450 MC continuous-wave radiation developed posterior subcapsular cataracts when vitreous temperature reached about 50°C.

Plain English Summary

Summary written for general audiences

Researchers exposed 56 male New Zealand white rabbits to continuous-wave radiation at 2450 MC with power densities from 0.12 to 0.40 WATTS/CM. Higher power densities required shorter exposure times to induce cataracts, with a six-minute exposure at 0.28 WATTS/CM. being the minimum cataractogenic single exposure. Repeated subthreshold exposures also caused cataracts, with two four-minute exposures two weeks apart proving cataractogenic.

Finding

THE PRELIMINARY SERIES SUGGESTS THE PROBABILITY THAT THE CATARACTOGENIC EFFECT OF MICROWAVE RADIATION AT THIS WAVELENGTH IS NOT PRIMARILY THERMAL.

In their words

“THE PRELIMINARY SERIES SUGGESTS THE PROBABILITY THAT THE CATARACTOGENIC EFFECT OF MICROWAVE RADIATION AT THIS WAVELENGTH IS NOT PRIMARILY THERMAL.”
Cite This Study
Russell L. Carpenter, David L. Biddle, B.S., Claire Van Ummersen, B.S., Cayetano P. Vlamalas, M.D., Hal Freeman, M.D. (1959). Experimental radiation cataracts induced by microwave radiation.
Show BibTeX
@article{experimental_radiation_cataracts_induced_by_microwave_radiation_g3827,
  author = {Russell L. Carpenter and David L. Biddle and B.S. and Claire Van Ummersen and B.S. and Cayetano P. Vlamalas and M.D. and Hal Freeman and M.D.},
  title = {Experimental radiation cataracts induced by microwave radiation},
  year = {1959},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

Posterior subcapsular cataracts were induced in rabbits exposed to 2450 MC continuous-wave radiation.
A six-minute single exposure at 0.28 WATTS/CM. was the minimum cataractogenic exposure.
Repeated subthreshold exposures caused cataracts in 34 of 43 experiments, with two four-minute exposures two weeks apart proving cataractogenic.
In 14 cases the opacity partially or completely regressed, while in the remainder it persisted unchanged for up to a year.