THE EFFECTS OF REPEATED AND PROLONGED EXPOSURE TO HIGH CONCENTRATIONS OF OZONE ON THE VISION OF AIRLINE PILOTS.
Rept. for 23 June 60-15 May 61,
MINNESOTA UNIV ROSEMOUNT ROSEMOUNT AERONAUTICAL LABS
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Twenty-eight human volunteers were exposed to ozone concentrations of 33, 58, and 83 parts per hundred million, by weight, for a gross total of 709.75 hours in three and six hour periods. Twenty-two of the subjects completed the entire series of six experiments. These experiments were designed to determine if prolonged exposure to atmospheric ozone in concentrations expected to be present inside the cabin of future high altitude commercial aircraft, when outside air is being used for cabin pressurization and ventilation, has any direct or indirect influence on the visual parameters of flight personnel. Comparison of the pre and post exposure data indicated significant changes in lateral phoria, divergence, convergence, visual fields and night vision in the majority of subjects. The effects are considered to constitute a safety hazard for future commercial aviation, and further study is urgently recommended. Author