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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 17, Iss. 3 — Mar. 1, 2000
  • pp: 628–634

Effect of the short-wavelength-sensitive-cone mosaic and rods on the locus of unique green

Vicki J. Volbrecht, Janice L. Nerger, Sheila M. Imhoff, and Corey J. Ayde  »View Author Affiliations

JOSA A, Vol. 17, Issue 3, pp. 628-634 (2000)

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A primary goal of this study was to establish whether the magnitude of the short-wavelength-sensitive- (S-) cone signal into the yellow/blue (Y/B) mechanism was influenced by the absolute or the relative numbers of S cones. This was assessed by measuring the locus of unique green for various test sizes at four eccentric locations chosen to exploit differences in the underlying mosaic of S cones. In general, the locus of unique green was unaffected by test size, retinal quadrant, or rod input but was influenced by retinal eccentricity. The locus of unique green shifted to shorter wavelengths as retinal eccentricity increased from 1° to 8°. The data do not support a model whereby the S-cone signal is determined by the absolute number of S cones, but a model based on the relative number of S cones cannot be eliminated.

© 2000 Optical Society of America

OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1720) Vision, color, and visual optics : Color vision
(330.5510) Vision, color, and visual optics : Psychophysics

Original Manuscript: May 24, 1999
Revised Manuscript: September 8, 1999
Manuscript Accepted: September 22, 1999
Published: March 1, 2000

Vicki J. Volbrecht, Janice L. Nerger, Sheila M. Imhoff, and Corey J. Ayde, "Effect of the short-wavelength-sensitive-cone mosaic and rods on the locus of unique green," J. Opt. Soc. Am. A 17, 628-634 (2000)

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