Accession Number : ADB086902


Title :   Comparative Visual Performance with ANVIS (Aviator's Night Vision Imaging System) and AN/PVS-5A Night Vision Goggles under Starlight Conditions


Descriptive Note : Interim rept. Sep 1983-Mar 1984


Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX


Personal Author(s) : Miller, R E , III ; Provines, W F ; Block, M G ; Miller, J W ; Tredici, T J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/b086902.pdf


Report Date : Aug 1984


Pagination or Media Count : 25


Abstract : Experimental testing of 10 subjects wearing the AN/PVS-5A (II GEN) night vision goggles (NVG) and ANVIS (III GEN) NVG was conducted under field conditions of ambient starlight illumination (approx. 10-5 mL). The parameters measured were: 1) binocular visual acuity (BVA), 2) stereopsis (depth perception), and 3) a subjective forced choice test. Results showed that BVA was 20/124 and 20/86 for the II and III GEN NVG, respectively. This difference was statistically as well as clinically significant. The stereopsis test results were inconclusive and variable because of the limited sample size and relative inexperience of the subjects in using NVG. Neither BVA nor stereopsis with the NVG was found to be related to standard baseline measures of these parameters in the clinic. Even though the ANVIS has better gain, resolution and sensitivity, 6 out of 10 subjects preferred the AN/PVS-5A for viewing the subjective test. This seemingly paradoxical finding was surmised to be a result of the presence or lack of scene contrast due to the differential sensitivities in the II and III GEN photocathode tubes.


Descriptors :   *NIGHT VISION DEVICES , *VISUAL PERCEPTION , *GOGGLES , *VISUAL ACUITY , RESOLUTION , TEST METHODS , SENSITIVITY , GAIN , AIRCRAFT EQUIPMENT , NIGHT VISION , SPACE PERCEPTION , STARLIGHT


Subject Categories : Psychology
      Anatomy and Physiology
      Optical Detection and Detectors
      Human Factors Engineering & Man Machine System


Distribution Statement : APPROVED FOR PUBLIC RELEASE