High-power lasers in the 1.3- to 1.4-um wavelength range: ocular effects and safety standard implications

Joseph A. Zuclich; David J. Lund; Peter R. Edsall; Bruce E. Stuck; Gordon T. Hengst

doi:10.1117/12.426706

17 May 2001 High-power lasers in the 1.3- to 1.4-μm wavelength range: ocular effects and safety standard implications

Joseph A. Zuclich, David J. Lund, Peter R. Edsall, Bruce E. Stuck, Gordon T. Hengst

Proceedings Volume 4246, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment; (2001) https://doi.org/10.1117/12.426706
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

This manuscript details recent studies ofocular effects ofpulsed and cw laser radiation at wavelengths of I .3 15 and 1.3 1 8 ?m, and compares corneal, lens and retinal damage thresholds. The results indicate that for the exposure conditions studied, relatively minor changes in pulsewidth and/or wavelength can substantially alter threshold levels and change the tissue site(s) exhibiting the lowest damage threshold. The discussion suggests that these data may be applied to re-assess laser safety standards in the near-IR to far-IR transition-region. Also discussed are unique aspects ofthe laser-tissue interaction for these penefrating wavelengths where the incident laser radiation is relatively evenly absorbed throughout the ocular medium and the retina. In such cases of "volurnefric" absorption obsewable manifestations of laser insult may be delayed (hours to days) and may ultimately involve inflammatory responses or other disruption oftissue not directly irradiated by the laser.

Citation Download Citation

Joseph A. Zuclich, David J. Lund, Peter R. Edsall, Bruce E. Stuck, and Gordon T. Hengst "High-power lasers in the 1.3- to 1.4-μm wavelength range: ocular effects and safety standard implications", Proc. SPIE 4246, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment, (17 May 2001); https://doi.org/10.1117/12.426706

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