Eighty-one members of girls' basketball teams were exposed to ultraviolet light while sitting in the bleachers of a school gymnasium. A mercury high-intensity discharge lamp lighting the bleacher area had a hole in its outer envelope that allowed the emission of ultraviolet light. Sixty-nine (85%) of the 81 girls were affected; 49 (71%) had symptoms of conjunctivitis and 63 (91%) had symptoms of erythema.
(JAMA 240:1980-1981, 1978)
Halperin W, Altman R, Black K, Marshall FJ, Goldfield M. Conjunctivitis and Skin ErythemaOutbreak Caused by a Damaged High-Intensity Lamp. JAMA. 1978;240(18):1980-1981. doi:10.1001/jama.1978.03290180054025