CIE 138-2000 CIE Collection in photobiology and photochemistry 2000

his volume contains short Technical Reports prepared by various Technical Committees within Division 6.-\n--\n-138/1 Blue Light Photochemical Retinal Hazard-\n-The results of studies of acute photochemical retinal injury, frequently referred to as the blue light hazard (BLH) are described in this technical report. The BLH results from a photochemical injury to the human retina and is termed by ophthalmologists photoretinitis. The studies were performed by a number of scientists, these works provided the basis for threshold limit values (TLV) and the BLH action spectrum recommended by the American Conference of Governmental Industrial Hygienists (ACGIH) in the 1970's, and more recently, after completion of the work of TC 6-14, by the International Commission on Non-Ionizing Radiation Protection (ICNIRP).-\n--\n-The potential for photoretinitis resulting from viewing the sun, tungsten-halogen lamps, high intensity discharge lamps, xenon short-arc lamps, welding arcs, etc., is provided in this report. Means and methods to evaluate potential BLH were studied by the CIE committee and one technique employing the ACGIH TLV is proposed for general use.-\n--\n-Both national and international standards for eye protectors exist. The recognized international standard (ISO 4850: Personal Eye Protectors for Welding and Related Techniques - Filters - Utilization and Transmittance Requirements) is followed internationally. It is concluded that actual specifications for maximal blue-light transmittance may be a desirable addition to future editions of eye protection standards. Keywords: actinic radiation effects, photobiology, ultraviolet radiation