May 2006
Volume 47, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2006
Investigation of Safety Exposure Range by 60 Ghz Millimeter–Wave for Rabbit Eyes
M. Kojima; Y. Yamashiro; H. Sasaki; J.–T. Qu; M. Hanazawa; K. Wake; S. Watanabe; M. Taki; Y. Kamimura; K. Sasaki
Author Affiliations & Notes
  • M. Kojima
    Kanazawa Medical University, Kahoku, Japan
    Department of Ophthalmology,
    Division of Vision Research for Environmental Health, Medical Research Institute,
  • Y. Yamashiro
    Kanazawa Medical University, Kahoku, Japan
    Division of Vision Research for Environmental Health, Medical Research Institute,
  • H. Sasaki
    Kanazawa Medical University, Kahoku, Japan
    Department of Ophthalmology,
  • J.–T. Qu
    Kanazawa Medical University, Kahoku, Japan
    Division of Vision Research for Environmental Health, Medical Research Institute,
  • M. Hanazawa
    National Institute of Information and Communications Technology, Tokyo, Japan
  • K. Wake
    National Institute of Information and Communications Technology, Tokyo, Japan
  • S. Watanabe
    National Institute of Information and Communications Technology, Tokyo, Japan
  • M. Taki
    Department of Electrical Engineering Graduate School of Engineering, Tokyo Metropolitan University, Tokyo, Japan
  • Y. Kamimura
    Department of Information Science, Faculty of Engineering, Utsunomiya University, Utsunomiya, Japan
  • K. Sasaki
    Kanazawa Medical University, Kahoku, Japan
    Division of Vision Research for Environmental Health, Medical Research Institute,
  • Footnotes
    Commercial Relationships  M. Kojima, None; Y. Yamashiro, None; H. Sasaki, None; J. Qu, None; M. Hanazawa, None; K. Wake, None; S. Watanabe, None; M. Taki, None; Y. Kamimura, None; K. Sasaki, None.
  • Footnotes
    Support  Committee to promote research o the possible biological efects of electromagnetic fields
Investigative Ophthalmology & Visual Science May 2006, Vol.47, 4077. doi:
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      M. Kojima, Y. Yamashiro, H. Sasaki, J.–T. Qu, M. Hanazawa, K. Wake, S. Watanabe, M. Taki, Y. Kamimura, K. Sasaki; Investigation of Safety Exposure Range by 60 Ghz Millimeter–Wave for Rabbit Eyes . Invest. Ophthalmol. Vis. Sci. 2006;47(13):4077.

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Abstract

Purpose: : Millimeter–wave bands have started to be used in various wireless applications such as data transmission and collision avoidance devices for cars in our life. This study was designed to investigate safety exposure range, ocular changes, progression and healing in rabbits by 60 GHz millimeter–wave exposure.

Methods: : The eyes of pigmented rabbits were exposed unilaterally to a 60 GHz millimeter–wave with lens antenna. Rabbits received systemic and topical anesthesia during exposure and ocular examinations. 10, 1,500, and 3,000 mW/cm2 for 6 minute exposures was given to investigate the effects of ocular changes. Ocular changes were evaluated by slit lamp, laser flare meter, and iris angiography.

Results: : Miosis and iris vasodilation but no corneal opacity was observed immediately after exposure with 3,000 mW/cm2. Corneal opacification and corneal epithelial damage were seen 1 to 7 days after exposure. Corneal opacification remained for over 7 weeks after exposure. Lens epithelial cell flat preparation showed cell damage in the pupil area 1 to 3 days after exposure. But lens was kept transparent. Through 1,500 mW/cm2 exposures, a half of rabbit in this group showed the same symptoms of 3,000 mW/cm2 exposure group. All ocular changes were healed within a week in the 1,500 mW/cm2 exposure group. No ocular changes were observed in the group of 10 mW/cm2 exposure.

Conclusions: : 10 mW/cm2 do not show any ocular changes in rabbit eyes. *This study was supported safety guideline study of Ministry of Internal Affairs and Communications of Japan.

Keywords: cataract • cornea: epithelium • radiation damage: light/UV 
© 2006, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
Copyright © 2025 Association for Research in Vision and Ophthalmology.
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