Accession Number : ADA310099

Title :   Night Vision Goggle Field-Expedient Visual Acuity Adjustment Procedures: Initial Experiment.

Descriptive Note : Final rept. Jul-Dec 95,

Corporate Author : ARMY RESEARCH INST FOR THE BEHAVIORAL AND SOCIAL SCIENCES ALEXANDRIA VA

Personal Author(s) : Dyer, Jean L. ; Young, Keith M. ; Watson, Scott A. ; McClure, Nancy R.

PDF Url : ADA310099

Report Date : MAY 1996

Pagination or Media Count : 46

Abstract : The third-generation image intensification technology in night vision goggles (NVGs) used by ground forces provides at best 20/40 or 20/45 visual acuity. These acuity levels cannot be achieved unless soldiers adjust their NVGs properly. Documentation available to soldiers does not address optimum adjustment techniques developed by the aviation community nor does it address what can be used in the field to achieve a good setting. We examined the effectiveness and utility of 15 different objects commonly available to soldiers to determine which provided the best visual acuity readings with the AN/PVS-713 NVGs. After training and practice acuity improved by 25% over the baseline assessment. No large differences in readings occurred among the objects. However, a more definitive picture emerged when the average readings were combined with measures of variability and soldier preferences. The initial recommendation is to use one of the following objects for NVG adjustment: trec trunk, vehicle, vehicle trail, stars, blue chem light, or an infrared chem light. Not recommended are bright and/or red light sources, white paper, and trees silhouetted against the night sky. Problems in assessing acuity with NVGs are also discussed

Descriptors :   *NIGHT VISION DEVICES, *AVIATION GOGGLES, *VISUAL ACUITY, ARMY PERSONNEL, ARMY TRAINING, INFANTRY, RED(COLOR), LIGHT SOURCES, BASE LINES, DOCUMENTS, VISION, STARS, NIGHT SKY.

Subject Categories : Anatomy and Physiology
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE