Study type: Medical/biological study (experimental study)

Effects of microwaves on the rabbit eye. med./bio.

Published in: J Microw Power 1969; 4 (4): 232-243

Aim of study (acc. to author)

To investigate the acute effects of continuous and pulsed microwave exposure on the lens of the rabbit eye.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 4.2–5.5 GHz
Exposure duration: 2 - 60 min
  • power: 1 W average over time
Exposure 2: 5.5 GHz
Modulation type: CW
Exposure duration: 2 - 50 min
-
Exposure 3: 5.5 GHz
Modulation type: pulsed
Exposure duration: 2 - 60 min
-
Exposure 4: 4.2–6.3 GHz
Modulation type: pulsed
Exposure duration: 5 - 25 min
  • power: 1 W average over time
Exposure 5: 70 GHz
Modulation type: CW
Exposure duration: continuous for 30 min
  • power: 610 mW average over time
Exposure 6: 0.8 GHz
Modulation type: CW
Exposure duration: 2 - 60 min
-

Exposure 1

Main characteristics
Frequency 4.2–5.5 GHz
Type
Exposure duration 2 - 60 min
Exposure setup
Exposure source
Setup An anesthetized animal was placed so that left eye was in contact with the adaptor and the right eye serving as control.
Parameters
Measurand Value Type Method Mass Remarks
power 1 W average over time - - -

Exposure 2

Main characteristics
Frequency 5.5 GHz
Type
Exposure duration 2 - 50 min
Modulation
Modulation type CW
Exposure setup
Exposure source
Parameters

No parameters are specified for this exposure.

Exposure 3

Main characteristics
Frequency 5.5 GHz
Type
Exposure duration 2 - 60 min
Modulation
Modulation type pulsed
Pulse width 5 µs
Duty cycle 0.1 %
Exposure setup
Exposure source
  • same as E2
Parameters

No parameters are specified for this exposure.

Exposure 4

Main characteristics
Frequency 4.2–6.3 GHz
Type
Exposure duration 5 - 25 min
Additional info 4.2, 4.6, 5.2, 6.3 GHz
Modulation
Modulation type pulsed
Exposure setup
Exposure source
  • same as E2
Parameters
Measurand Value Type Method Mass Remarks
power 1 W average over time - - -

Exposure 5

Main characteristics
Frequency 70 GHz
Type
Exposure duration continuous for 30 min
Modulation
Modulation type CW
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 610 mW average over time - - -

Exposure 6

Main characteristics
Frequency 0.8 GHz
Type
Exposure duration 2 - 60 min
Modulation
Modulation type CW
Exposure setup
Exposure source
  • coaxial adaptor
Parameters

No parameters are specified for this exposure.

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated organ system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

All frequencies used in this study were capable to induce opatic damages. At 5.5 GHz no difference between continuous and pulsed microwave exposure could be observed and lens injury was almost always apparent by the fourth day after exposure. Comparison of the findings obtained at different frequencies suggest that microwave power becomes more effective in producing lens injury as the frequency increases. Preliminary results of 70 GHz exposure suggest a thermal effect of microwave exposure.

Study character:

Study funded by

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