THE EFFECT OF WAVELENGTH ON VISUAL ACUITY.
Final rept., 1 Oct 65-31 Sep 66,
EYE RESEARCH FOUNDATION BETHESDA MD
Pagination or Media Count:
Visual acuity was measured in monochromatic light at wavelengths between 440 and 660 nm. The test objects were gratings which filled a 1.5 degree circular field centered in a 30 degree neutral surround. Luminance contrast between adjacent bars was adjustable, and acuity thresholds were determined for different contrasts. It was found that acuity depends primarily on luminance contrast and only slightly on wavelength, so that the same luminance contrast yields similar acuity thresholds at all wavelengths provided that the test objects are equated in luminance. It is suggested that the dominant wavelength of a visual display system such as a cathode ray screen is relatively unimportant in the perception of fine detail. Instead, criteria such as grain size and available luminance are more important. Author
- Anatomy and Physiology