The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

The Effect of Transient Weightlessness on Visual Acuity

Report Number: WADD TR 61-184
Author: Pigg, Leroy D.
Author: Kama, William N.
Corporate Author: Behavorial Sciences Laboratory
Laboratory: Behavioral Sciences Laboratory
Date of Publication: 1961-03
Pages: 24
Contract: Laboratory Research - No Contract
Project: 7184
Task: 71586
AD Number: AD0261906

Visual acuity was measured on subjects while they were exposed to short periods of weightlessness aboard an aircraft flown through "zero-g" trajectories involving transition from 1 g to 2-1/2 g to zero g. Monocular and binocular acuity of near and far vision were measured on both Snellen and checkerboard targets. Control measurements were made on the ground and inflight at 1 g in counter-balanced sequence with the zero-g measurements. Results show that the weightless environment produced for this study has a detrimental effect on visual acuity as measured. The decrement is not considered to have practical significance.

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