Corneal damage thresholds for multiple-pulse exposures to 2.02 μm radiation from a Tm:YAG laser

R. L. McCally, C. B. Bargeron

Research output: Contribution to journalConference articlepeer-review

Abstract

Corneal epithelial damage thresholds were determined for exposures to sequences of pulses from a Tm:YAG laser (wavelength 2.02 μm). Pulse repetition frequencies were 1, 10, 20, and 100 Hz and individual pulse durations were 0.300 sec at 1 Hz, 0.025 sec at 10 and 20 Hz, and 0.005 sec at 100 Hz. Threshold damage is correlated by an empirical power law of the from Ith = CN in which Ith is the threshold irradiance and N is the number of pulses. The constant C differs depending on the pulse repetition frequency and individual pulse duration. The exponent α varies between 0.22 and 0.29. For some exposure conditions the empirical power law underestimates the damage threshold for small numbers of pulses.

Original languageEnglish (US)
Pages (from-to)97-103
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4246
DOIs
StatePublished - Jan 1 2001
EventLaser and Noncoherent Light Ocular Effects:Epidemiology, Prevention, and Treatment - San Jose, CA, United States
Duration: Jan 22 2001Jan 22 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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