Senescence of spatial chromatic contrast sensitivity. II. Matching under natural viewing conditions

Peter B. Delahunt, Joseph L. Hardy, Katsunori Okajima, John S Werner

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)60-67
Number of pages8
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number1
StatePublished - 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Vision and Pattern Recognition


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