Abstract

Hue-discrimination functions were derived from hue-naming data (480620nm, 20nm steps) obtained in 4min intervals from 4min to 28min postbleach at 10° temporal retinal eccentricity. Hue-naming data were also obtained in the fovea. Hue-discrimination functions derived at the 4, 8, and 12min intervals were very similar to those derived in the fovea. As time postbleach exceeded 12min and rod sensitivity increased, the shape of the hue- discrimination functions changed. Most notably, the minimum between 560580nm disappeared and the just noticeable differences (JNDs) for the longer wavelength stimuli increased. The long-wavelength suppression in hue discrimination may be due to rod input in the magnocellular pathway interacting and affecting the long- wavelength sensitivity of the parvocellular pathway.

© 2011 Optical Society of America

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