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M. Kojima, I. Hata, M. Hanazawa, K. Wake, S. Watanabe, M. Taki, Y. Kamimura, N. Takahashi, K. Sasaki; The Acute Effects of Millimeter–Wave Exposure to the Eye . Invest. Ophthalmol. Vis. Sci. 2005;46(13):831.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: Millimeter–wave (MMW) bands have just started to be used in various wireless applications in our daily life. The ICNIRP has determined a safety range within the relatively wide range of 1.5 to 300 GHz. This study developed an experimental system that examined the effect of 60GHz to the eye. Methods: The eyes of pigmented rabbits were exposed unilaterally to a 60 GHz MMW (3W) with either horn (–3 dB beam width: 19.5mm) or lens (–3 dB beam width: 6.0mm) antenna. Ocular changes were evaluated by slit lamp, laser flare cell meter or specular microscope. To adjust the exposure area, XY laser indicators and thermography were used. Results: In the eye vicinity exposure by the horn antenna, the rabbits' eyes were closed due to blepharedema within 5 minutes of MWW exposure. This blepharedema inhibited the penetration of MMW into the eye, so no ocular injury developed. In the exposure by the lens antenna, corneal epithelial and endothelial injuries, iris hemorrhage, miosis, and ocular inflammations were induced. Even when the eye was exposed by the lens antenna, the avoidance response of the rabbit and blepharedema were generated when the exposure area included the eye lid. Conclusions: In ICNIRP, the biological effect position is the skin and eyeball surface by MMW exposure. This system is useful for investigating ocular injury by MMW or to get clear evidence of defense guideline data for eye injury generation by MMW.
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