Accession Number : AD0767212

Title :   Comparative Performance of Aviation Filters on the Human Contrast Sensitivity Function.

Descriptive Note : Final rept. Mar 71-Jun 73,

Corporate Author : INDIANA UNIV BLOOMINGTON DIV OF OPTOMETRY

Personal Author(s) : Everson,Ronald W. ; Levene,John R.

Report Date : JUL 1973

Pagination or Media Count : 73

Abstract : Grating targets of different spatial frequency and with square and sine wave luminance distributions were presented to male subjects who wore ophthalmic filters that are frequently used by aviators, namely, neutral gray, yellow, and rose-colored. Threshold light modulation that permitted detection of the grating pattern was determined. Average luminance levels from bright to dim were used. Although contrast sensitivity was found to vary with luminance level, it has not been possible to demonstrate the clear-cut superiority of one colored sunglass filter over another in this experiment. The differences that are seen are related to the luminous transmittances of the filter and not to their intrinsic colorations. (Author)

Descriptors :   (*ULTRAVIOLET FILTERS, *AVIATION PERSONNEL), OPTICAL FILTERS, EYEGLASSES, PERFORMANCE(ENGINEERING), THRESHOLDS(PHYSIOLOGY), LIGHT, OPHTHALMOLOGY

Subject Categories : Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE