FLIGHT CREW EXPOSURE TO OZONE CONCENTRATIONS AFFECTING THE VISUAL SYSTEM

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Abstract
To estimate the potential for O3 effects on the human visual system in flight, O3 concentrations in Boeing 747-100 cockpits were measured during routine flights between London [England, UK] and the USA. O3 may have beneficial and harmful effects but further studies of the visual system responses to O3 are necessary before the effects of 0.030 ppm mean O3, 0.200 ppm maximum O3, and 0.261 ppm h average cumulative O3 exposure can be effectively evaluated. Unexpectedly high O3 concentrations were encountered at altitudes below 18,000 feet and, at times, the O3 concentration decreased as flight level was increased. The clinical, operational [hazard to flight crew] and policy implications are discussed.

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