Comparative Performance of Aviation Filters on the Human Contrast Sensitivity Function.
Final rept. Mar 71-Jun 73,
INDIANA UNIV BLOOMINGTON DIV OF OPTOMETRY
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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
- Human Factors Engineering and Man Machine Systems