Laser Engagement Systems (LES) of the type recently developed by Xerox Electro-Optical Systems involve the intentional direction of pulsed laser radiation at humans. Since the hazard of ocular irradiance is obvious, it is imperative that such systems be eye safe to the point of insuring that no permanent retinal damage can be inflicted regardless of the tactical environment. The analysis developed in this paper considers the influence of power levels, pulse duration, multiple pulses, laser beam divergence, distributed and point source characteristics and, finally, the matter of retinal thermal relaxation. The results of this analysis are a series of constraints which must be placed upon the design of an LES system in order to insure human eye safety under all conditions.