Abstract
A series of rooftop and laboratory experiments was conducted to investigate the effects of aircraft cockpit window posts on eye accommodation and the detection of simulated contrails. A window post equal in width to the interocular distance of 6.35 cm and one approximately 5 cm wider had comparable effects on accommodation, pulling focus inward from its empty-field resting distance in each case. However, the wider post seriously derogated the probability of detecting portions of contrails that appeared in the sectors of monocular visibility on either side, relative to the near-perfect single-look detectability with the nominal standard post width.
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