Study type: Medical/biological study (experimental study)

Effect of microwaves on the eye med./bio.

By: Birenbaum L, Grosof GM, Rosenthal SW, Zaret MM
Published in: IEEE Trans Biomed Eng 1969; 16 (1): 7-14
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Aim of study (acc. to author)

To investigate the acute effects of continuous and pulsed 5,5 GHz microwave exposure on the lens of the rabbit eye.

Background/further details

After the exposure the rabbit's eyes were examined for immediate effects. Subsequently, the animal was examined the fourth day after exposure, and at weekly intervals thereafter for a period of about one month.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 5.5 GHz
Modulation type: CW
Exposure duration: approximately 30 to 35 min
  • power: 650 mW (up to 1 W (average value))
Exposure 2: 5.5 GHz
Modulation type: pulsed
Exposure duration: approximately 20 to 25 min
  • power: 650 mW (up to 1 W (average value))

Exposure 1

Main characteristics
Frequency 5.5 GHz
Charakteristic
  • guided field
Exposure duration approximately 30 to 35 min
Modulation
Modulation type CW
Exposure setup
Exposure source
Setup as adapterr from the waveguide to the rabbit's eye a ridged guide and a length of circular waveguide was used; cornea of the rabbit's eye placed in a spherical depression of the circular waveguide
Parameters
Measurand Value Type Method Mass Remarks
power 650 mW - measured - up to 1 W (average value)

Exposure 2

Main characteristics
Frequency 5.5 GHz
Charakteristic
  • guided field
Exposure duration approximately 20 to 25 min
Modulation
Modulation type pulsed
Pulse width 5 µs
Duty cycle 0.001 %
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power 650 mW - measured - up to 1 W (average value)

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Acute lense injury could be observed almost always by the fourth day following the exposure. No significant difference between the effects of continuous and pulsed microwave exposure could be observed.

Study character:

Study funded by

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