MILLIMETER WAVE ABSORPTION IN THE NONHUMAN PRIMATE EYE AT 35 GHz AND 94 GHz

MILLIMETER WAVE ABSORPTION IN THE NONHUMAN PRIMATE EYE AT 35 GHz AND 94 GHz

The purpose of this study was to evaluate anterior segment bioeffects of pulsed 35 GHz and 94 GHz microwave exposure in the nonhuman primate eye. Five juvenile rhesus monkeys (Macaca mulatta) underwent baseline anterior segment ocular assessment consisting of slit lamp examination, corneal topograph...

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Bibliographic Details
Published in:Health physics (1958) Vol. 83; no. 1; pp. 83 - 90
Main Authors: Chalfin, Steven, D’Andrea, John A, Comeau, Paul D, Belt, Michael E, Hatcher, Donald J
Format: Journal Article
Language:English
Published: Hagerstown, MD Health Physics Society 01-07-2002
Lippincott
Subjects:
Animals
Biological and medical sciences
Cornea - radiation effects
Corneal Diseases - etiology
Diseases of cornea, anterior segment and sclera
Dose-Response Relationship, Radiation
Eye - radiation effects
Macaca mulatta
Medical sciences
Microwaves
Ophthalmology
Radiation Injuries - physiopathology
Human
Evaluation
Monkey
Microwave
Risk
Exposure
Epidemiology
Eye
Vertebrata
Eye disease
Mammalia
Absorption
Primates
Public health
Anterior segment disease
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Summary:The purpose of this study was to evaluate anterior segment bioeffects of pulsed 35 GHz and 94 GHz microwave exposure in the nonhuman primate eye. Five juvenile rhesus monkeys (Macaca mulatta) underwent baseline anterior segment ocular assessment consisting of slit lamp examination, corneal topography, specular microscopy, and pachymetry. These studies were repeated after exposure of one eye to pulsed 35 GHz or 94 GHz microwaves at varied fluences, with the other eye serving as a control. The mean fluence required to produce a threshold corneal lesion (faint epithelial edema and fluorescein staining) was 7.5 J cm at 35 GHz and 5 J cm at 94 GHz. Transient changes in corneal topography and pachymetry were noted at these fluences. Endothelial cell counts remained unchanged. Threshold corneal injury from 35 GHz and 94 GHz microwave exposure is produced at fluences below those previously reported for CO2 laser radiation. These data may help elucidate the mechanism of thermal injury to the cornea, and resolve discrepancies between , , and safety standards for exposure to non-ionizing radiation at millimeter wavelengths.
ISSN:0017-9078
1538-5159
DOI:10.1097/00004032-200207000-00009