Lasers present many safety threats, but the most common threat is damage to the eyes.
Many lasers emit invisible ultraviolet or infrared radiation. Supervisors need to report all users of Class 2 or above to the Laser Safety Officer for possible medical surveillance if an exposure problem is discovered. Laser devices require engineering controls to ensure safety. All Class 3 and 4 lasers require a combination of protective housing, area warning signs or remote firing capabilities. Be very careful when working with hand-held laser pointers.