Share Email Print

Proceedings Paper

Corneal damage thresholds for multiple-pulse exposures to 2.02-um radiation from a Tm:YAG laser
Author(s): Russell L. McCally; C. Brent Bargeron
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Corneal epithelial damage thresholds were determined for exposures to sequences of pulses from a Tm:YAG laser (wavelength 2.02 ?m). 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 lawof the form '1th= CN?, in which '1th 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 a varies between 0.22 and 0.29. For some exposure conditions the empirical power law underestimates the damage threshold for small numbers of pulses.

Paper Details

Date Published: 17 May 2001
PDF: 7 pages
Proc. SPIE 4246, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment, (17 May 2001); doi: 10.1117/12.426708
Show Author Affiliations
Russell L. McCally, Johns Hopkins Univ. and Johns Hopkins Univ. Medical School (United States)
C. Brent Bargeron, Johns Hopkins Univl. (United States)

Published in SPIE Proceedings Vol. 4246:
Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment
Bruce E. Stuck; Michael Belkin M.D., Editor(s)

© SPIE. Terms of Use
Back to Top