Accession Number : AD0159358


Title :   PILOT STUDIES OF A SCOTOPIC SENSITIVITY TEST


Corporate Author : NAVAL MEDICAL RESEARCH LAB NEW LONDON CT


Personal Author(s) : FOOKS, GILBERT ; SWEENEY, EDWARD J ; DIMMICK, FORREST L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/159358.pdf


Report Date : 14 Jun 1957


Pagination or Media Count : 12


Abstract : A new test of night vision sensitivity has been devised, that is based on data obtained in a series of experiments reported by this Laboratory. Those findings indicated (1) that sensitivity in the visual field must be sampled in two dimensions; and (2) that size and brightness of the test areas can be used interchangeably. The present preliminary studies were designed to determine (1) whether a sampling procedure would give the same indication of the distribution of sensitivity as the more extended psychophysical techniques; (2) whether reliable differences in individual scotopic sensitivity were indicated; (3) whether multiple stimuli could be presented as a time-saving device; and (4) whether one or two testing sessions would give an adequate score. The results show (1) that the sensitivity scores correlate well with the psychophysical findings; (2) that significant individual differences in scoptopic sensitivity exist; (3) that multiple stimuli do not produce any decrement in the sensitivity scores; and (4) that two testing sessions serve to differentiate individuals adequately.


Descriptors :   *VISION , *VISUAL PERCEPTION , *EYE , TEST METHODS , SENSITIVITY , NIGHT VISION , PILOT STUDIES , PSYCHOPHYSICS


Subject Categories : Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE