Abstract
In the investigation of various factors which can adversely influence the proper functioning of the visual apparatus in the aerospace environment, the study of space-cabin atmosphere composition and contamination has been largely neglected. Visual effects of the more classical contaminants have been little investigated. This paper discusses these contaminants as well as the effects of ozone on certain visual parameters, in view of the fact that under influence of solar and cosmic radiations ozone may be formed from liquid and gaseous oxygen supplies on board spacecraft. Based upon the observed physiological effects of small doses of positive and negative free air ions, it is hypothesized that, in the ionized state, some gaseous and volatile human metabolic waste products may have entirely different properties than they have in the ordinary state, and may affect vision. Until definitely proven otherwise, this possibility must be accepted and investigated.
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