June 2017
Volume 17, Issue 7
Open Access
OSA Fall Vision Meeting Abstract  |   June 2017
Color percepts elicited by stimulation of individual targeted cones
Journal of Vision June 2017, Vol.17, 25. doi:10.1167/17.7.25
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      Austin Roorda, Ramkumar Sabesan, Brian P. Schmidt, Lawrence C. Sincich, William S. Tuten; Color percepts elicited by stimulation of individual targeted cones. Journal of Vision 2017;17(7):25. doi: 10.1167/17.7.25.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

To study the circuits underlying color vision near the fovea, we developed a system with adaptive optics and high-speed eye tracking that enables tracking, targeting and stimulation of cones in living eyes. In two subjects with classified mosaics, cones stimulated with 543 nm light against a white background yield expected and unexpected percepts. Stimulated M cones yield either green or achromatic percepts, and the individual responses are pure - largely falling into color or achromatic reporting classes. L cones respond similarly, except the fraction of color-reporting cones yield red percepts. Similar results are found against a blue background, but the M cones convey distinctly blue percepts rather than green. What is unexpected is that the arrangement of the color and achromatic reporting cones are distributed in a way that is inconsistent with simple chromatically-opponent, center-surround midget ganglion cells. To understand how lateral interactions influence these percepts, we're measuring cone sensitivity thresholds against different adapting background conditions. Collectively, these studies shed light on how foveal cone signals are transformed by retinal circuitry.

Meeting abstract presented at the 2016 OSA Fall Vision Meeting

Footnotes
 Support: NIH R01EY023591, NIH R21EY021642, NIH T32EY07031, NIH T32EY007043, NIH K23EY022412, Fight for Sight Postdoctoral award, American Optometric Foundation William C. Ezell Fellowship, Burroughs Wellcome Fund
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