December 2007
Volume 7, Issue 15
Free
Meeting Abstract  |   December 2007
Computer Model of Color Vision Circuit Parallels Psychophysical Responses to Single Cone Photoreceptor Stimulation by a 550 nm Wavelength Light
Author Affiliations
  • James Kuchenbecker
    Medical College of Wisconsin
  • Joseph Carroll
    Medical College of Wisconsin
  • Maureen Neitz
    Medical College of Wisconsin
  • Jay Neitz
    Medical College of Wisconsin
Journal of Vision December 2007, Vol.7, 77. doi:10.1167/7.15.77
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      James Kuchenbecker, Joseph Carroll, Maureen Neitz, Jay Neitz; Computer Model of Color Vision Circuit Parallels Psychophysical Responses to Single Cone Photoreceptor Stimulation by a 550 nm Wavelength Light. Journal of Vision 2007;7(15):77. doi: 10.1167/7.15.77.

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      © 2015 Association for Research in Vision and Ophthalmology.

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Adaptive optics allows for near diffraction-limited imaging of the photoreceptor mosaic in vivo. Hofer et al. (Journal of Vision 2005 (5)) used this technology, essentially in reverse, to deliver points of 550 nm light to the retina. We compared their psychophysical results to those from a computer implementation of a physiologically-based model of the circuit for color vision in which the cortex performs an operation on the LGN input analogous to that carried out by the midget ganglion-cell circuit on the cone signals. This forms cortical circuits that resolve the confound between diffuse colored lights and luminance edges without introducing cell-type specific L/M connections or Hebbian learning to inform the appropriate neural wiring. Circuits for color were imposed by the receptor mosaic and by post-receptoral elements early in the pathway as a consequence of indiscriminate comparisons of the activity of a cell with its neighbors. Retinal mosaics were created to match the L:M ratios of the subjects tested by Hofer et al. Retinal coordinates were randomly chosen for stimulation by the 550 nm stimuli. The computer model accounted for observed variations in color percepts within an observer and the individual differences in perceptions between observers with differing L:M ratios.

Kuchenbecker, J. Carroll, J. Neitz, M. Neitz, J. (2007). Computer Model of Color Vision Circuit Parallels Psychophysical Responses to Single Cone Photoreceptor Stimulation by a 550 nm Wavelength Light [Abstract]. Journal of Vision, 7(15):77, 77a, http://journalofvision.org/7/15/77/, doi:10.1167/7.15.77. [CrossRef]
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