This radiation can cause photokerato-conjunctivitis (arc-eye), which is
painful but does not usually result in permanent damage. Ultraviolet and
infrared promote the formation of cataracts. There are several means of preventing
eye damage. We may wearUVprotective goggles or we may use protective
shields both for eyes and the face. Even when the eyes are protected,
no one should ever stare directly into the beam.