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light, and therefore heat, constitutes a potential hazard to thepersonnel who use it. 14N o reference is made, of course, to the use of the laser inpornography, but one must assume that the hazards are notmitigated by the fun factor.O. S. Heavens summarizes the dangers of the laser as they arewidely recognized by authorities in the field:W hat are the ways in which laser radiation will affectbiological material?. . . First, the high intensity in a laserbeam may produce heating, so producing a bum or evencomplete volatilisation of the material. Secondly, the laserbeam may generate high-intensity acoustic (sound or ultrasonic)waves which may. . . damage material in the neighbourhoodof the laser s h o t. . . Thirdly, the large electric field associatedwith the intense beam may affect the biological material.Fourthly, a pressure wave may spread out from the point ofimpact. O ur present understanding of many of these effects isat a very primitive level. . . I5N ehrich, Voran, and Dessel stress the foolishness involved inunderestimating the danger of any laser, however weak:It cannot be emphasized too strongly that there are manydangers in laser operations. Even the least powerful laser beamm ust be treated as potentially dangerous. It is not necessary,for example, to look directly into the laser beam in order tosustain eye damage. Accidental reflections from such things aswristwatch crystals, metal watch bands, buttons, jewels, oreven a glossy enamelled surface may reflect a portion of thebeam into someone’s eye. 16Mallow and Chabot emphasize that “[electrocution is a realpossibility. Indeed, four documented electrocutions from laserrelatedactivities have occurred in the United States. ” 17 In additionto citing dangers to eyes and skin and the possibility of electricalaccidents, John F. Ready warns against another threat commonlymentioned in the literature on lasers: “there are hazards. . . from