Senescence of spatial chromatic contrast sensitivity. II. Matching under natural viewing conditions
JOSA A, Vol. 22, Issue 1, pp. 60-67 (2005)
http://dx.doi.org/10.1364/JOSAA.22.000060
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Abstract
Age-related changes in the spatial chromatic contrast sensitivity function of detection, measured along S and L - M cone axes, were demonstrated in a companion paper [Hardy et al., J. Opt. Soc. Am. A 22, 49 (2005)]. Here senescent changes in chromatic contrast appearance were assessed by contrast-matching functions (CMFs). Luminance and chromatic CMFs (S and L - M axes) were compared for younger (age 18-31 yr) and older (age 65-75 yr) trichromatic subjects by using stimuli that were perceptually anchored to the same physical standard contrasts. Subjects matched the contrast of test gratings of various spatial frequencies (0.5-8 cycles per degree) to the standard stimuli under natural viewing conditions. Because of changes in the visual system with age, the standard stimuli were closer to threshold for older subjects; however, in general, the shapes of the CMFs were similar for both groups. The results suggest that the perception of relative contrasts across spatial frequencies is stable with age.
© 2005 Optical Society of America
OCIS Codes
(330.1720) Vision, color, and visual optics : Color vision
(330.5510) Vision, color, and visual optics : Psychophysics
Citation
Peter B. Delahunt, Joseph L. Hardy, Katsunori Okajima, and John S. Werner, "Senescence of spatial chromatic contrast sensitivity. II. Matching under natural viewing conditions," J. Opt. Soc. Am. A 22, 60-67 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-1-60
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