JUNGLE VISION 4: AN EXPLORATORY STUDY ON THE USE OF YELLOW LENSES TO AID PERSONNEL DETECTION IN AN EVERGREEN RAINFOREST
Abstract
The purpose of the study was to explore the use of nonmagnifying yellow lenses to enhance personnel detection in the evergreen rainforest. Twelve US Infantry soldiers with normal vision, using spectacles fitted with yellow lenses, were each presented 45 randomly appearing human targets within a 180 deg. field of search. The targets, who were dressed in standard Army field clothes, stood motionless at predetermined distance markers facing the observer. Tests were conducted on three sites in the evergreen rainforest of the Canal Zone during the dry season (April 1965). Results were compared with those obtained from 18 additional observers with unaided vision, who were tested on the same sites and under the same conditions. The major effect of using the yellow lenses was to restrict rather than increase detectability of human targets. Perceptually, the lenses made the targets appear farther from the observers, resulting in significant distance overestimation. Detection times and practice effects were not affected by use of the lenses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1965
- Accession Number
- AD0622336
Entities
People
- C. M. Kindick
- D. A. Dobbins
- M. Gast