Accession Number : AD0649882

Title :   SOME OBSERVATIONS AND MEASUREMENTS OF THE PANUM PHENOMENON.

Descriptive Note : Interim rept.,

Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s) : Gettys,Charles F. ; Harker,George S.

Report Date : 13 APR 1967

Pagination or Media Count : 42

Abstract : The angular separation between the 'binocular' and the 'monocular' line of Panum's limiting case was systematically varied under conditions in which the changes in seen relative depth could be quantified. Stereoscopic, equidistant, and anomalous depth localizations were seen. A criterion of variability of depth localization was utilized to differentiate the mechansim operative in determining the seen depth. When stereopsis is clearly present, depth in Panum's limiting case is predictable and reveals a one-to-one relationship with the angle of lateral separation of the stereoscopic stimuli, i.e., the odd line cooperates in free binocular vision with both of the paired lines to give 'true' stereoscopic depth. The range of angular separation over which Panum's limiting case will give rise to stereoscopic depth is increased by free eye movements well beyond the usually reported limits of Panum's retinal areas. (Author)

Descriptors :   (*SPACE PERCEPTION, PSYCHOPHYSICS), VISUAL PERCEPTION, EYE, MOTION, MEASUREMENT, RETINA, PERFORMANCE(HUMAN)

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE