Study type: Medical/biological study (experimental study)

Investigation of single-exposure microwave ocular effects at 3000 MHz. med./bio.

Published in: Ann N Y Acad Sci 1975; 247: 125-134

Aim of study (acc. to author)

To investigate the effects of a single 3 GHz microwave exposure to rabbit eye.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 3 GHz
Exposure duration: 15 min
Exposure 2: 3 GHz
Exposure duration: 30 min

Exposure 1

Main characteristics
Frequency 3 GHz
Exposure duration 15 min
Modulation
Modulation type unspecified
Exposure setup
Exposure source
  • aluminum ellipsoid dish with two focal points 32.848 and 74.848 inches from its vortex
Chamber Anechoic chamber/ 16 ft x 16 ft x 32 ft
Setup Anesthetized rabbits were positioned on a styrofoam pedestal with the left eye on the axis of the beam, one foot beyond the second focal point of the dish antenna
Parameters
Measurand Value Type Method Mass Remarks
power density 100 mW/cm² - measured - -
power density 200 mW/cm² - measured - -
power density 300 mW/cm² - measured - -
power density 400 mW/cm² - measured - -
power density 500 mW/cm² - measured - -

Exposure 2

Main characteristics
Frequency 3 GHz
Exposure duration 30 min
Modulation
Modulation type unspecified
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
power density 100 mW/cm² - measured - -
power density 200 mW/cm² - measured - -
power density 300 mW/cm² - measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

No ocular changes could be found in animals exposed for 15 or 30 min at power densities of 100 or 200 mW/cm2. Also no longterm effects under these exposure conditions could be observed by monthly examination for a one-year periode.
At 300 mW/cm2 and above, acute effects, such as miosis, anterior chamber flare, injection of the conjunctiva, and dilations of iris vessels, were found. These effects persisted for as long as 24 h and were believed to be caused by thermal stress. One year after exposure these changes were absent.

Study character:

Study funded by

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