Corneal epithelial injury thresholds for exposures to 1.54-um radiation

Russell L. McCally; Jennifer Bonney-Ray; C. Brent Bargeron

doi:10.1117/12.479760

20 June 2003 Corneal injury thresholds for exposures to 1.54-μm radiation

Russell L. McCally, Jennifer Bonney-Ray, C. Brent Bargeron

Proceedings Volume 4953, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment III; (2003) https://doi.org/10.1117/12.479760
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

Corneal epithelial injury thresholds have been determined for exposures to 1.54 μm infrared radiation having durations from 1 to 100 sec and beam diameters from 0.5 to 7 mm. For 1 sec exposures, measured thresholds range from 12 W/cm² (5 mm diameter beam ) to 67 W/cm² (0.5 mm diameter). For 2 sec exposures, they range from 9 W/cm² (7mm diameter) to 57 W/cm² (0.5 mm diameter). For 10 sec exposures, they range from 3.7 W/cm² (7mm diameter) to 33 W/cm² (0.5 mm diameter). For 100 sec exposures, they are 1.4 W/cm² (7mm diameter) and 3.7 W/cm² (2mm diameter). The dependence of the measured thresholds on laser beam diameter provides strong evidence supporting a critical temperature damage model. These measured thresholds are greater than 10 times the maximum permissible exposure (MPE) in ANSI Z-136.5-2000.

Citation Download Citation

Russell L. McCally, Jennifer Bonney-Ray, and C. Brent Bargeron "Corneal injury thresholds for exposures to 1.54-μm radiation", Proc. SPIE 4953, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment III, (20 June 2003); https://doi.org/10.1117/12.479760

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