The Effect of Transient Weightlessness on Visual Acuity

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

Provenance: IIT

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