Study type: Medical/biological study (experimental study)

Effects of 2450-MHz radiation on the rabbit eye. med./bio.

Published in: IEEE Trans Microw Theory Tech 1975; 23 (6): 492-498

Aim of study (acc. to author)

To investigate the effects of 2450 MHz microwave exposure in vivo on rabbit eye.



Exposure Parameters
Exposure 1: 2.45 GHz
Exposure duration: up to 100 min

Exposure 1

Main characteristics
Frequency 2.45 GHz
Exposure duration up to 100 min
Additional info horizontal polarization
Modulation type unspecified
Exposure setup
Exposure source
Distance between exposed object and exposure source 0.05 m
Setup Rabbits were placed in a acrylic box with the head fixed by a acrylic restrainer
Measurand Value Type Method Mass Remarks
power density 150 mW/cm² unspecified measured - maximum SAR= 138 W/kg applied for 100 min
power density 300 mW/cm² unspecified measured - SAR= 270 W/kg for 30-35 min exposure
power density 200 mW/cm² unspecified measured - SAR = 180 W/kg for 35-40 min exposure
power density 1,000 W/m² unspecified measured - SAR= 90 W/kg; applied for 60 min

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • during exposure
  • after exposure

Main outcome of study (acc. to author)

The main attention was to define a thermal threshold for cataractogenic microwave effects. After irradiation irreversible damage were only observed in the posterior cortical area of the eye lens. The minimum cataractogenic power density was 150 mW/cm2 for 100 min, which correspond to an SAR value of 138 W/kg in the vitreous body.
The study revealed a possible threshold temperature around 41°C. Furthermore the eye lens seems to be the most critical part of the eye to microwave irradiation. The findings of this study point to a thermal mechanism responsible for the observed microwave effects. However, the possibility of nonthermal effects of microwave radiation on eye should not easily rejected.

Study character:

Study funded by

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