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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 29, Iss. 2 — Feb. 1, 2012
  • pp: A298–A305

Optics InfoBase > JOSA A > Volume 29 > Issue 2 > Page A298

A tritan Waldo would be easier to detect in the periphery than a red/green one: evidence from visual search

Rob N. Dalhaus and Karen L. Gunther  »View Author Affiliations


JOSA A, Vol. 29, Issue 2, pp. A298-A305 (2012)
http://dx.doi.org/10.1364/JOSAA.29.00A298


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Abstract

In a color naming task from 0° to 55° eccentricity, we found that red/green performance (n=10 subjects) declines around 40° eccentricity, 5° earlier than does tritan performance (main effect of color, p=0.009; eccentricity, p<0.001; interaction, p=0.005). In a feature visual search task (e.g., red target dot among green distractor dots; twelve 2.5° diameter dots; 0, 20, and 45° eccentricity; 12 subjects), performance was significantly more impaired for red/green than for tritan stimuli, especially in the periphery (main effect of color, p=0.007; eccentricity, p<0.001; interaction, p=0.003). This effect occurred even following a rod bleach. Our results are consistent with influences from both the retina (especially random rather than selective peripheral cone input to midget ganglion cells for red/green perception, and selective cone input to small bistratified cells for tritan perception) and the cortex (differential cortical magnification across the two chromatic axes).

© 2012 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

ToC Category:
Mesopic and peripheral color vision

History
Original Manuscript: July 12, 2011
Revised Manuscript: December 14, 2011
Manuscript Accepted: December 15, 2011
Published: February 1, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Rob N. Dalhaus and Karen L. Gunther, "A tritan Waldo would be easier to detect in the periphery than a red/green one: evidence from visual search," J. Opt. Soc. Am. A 29, A298-A305 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-2-A298

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