Mesopic rod and S-cone interactions revealed by modulation thresholds

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
Andrew J ZeleBeatrix Feigl

Abstract

We analyzed mesopic rod and S-cone interactions in terms of their contributions to the blue-yellow opponent pathway. Stimuli were generated using a four-primary colorimeter. Mixed rod and S-cone modulation thresholds (constant L-, M-cone excitation) were measured as a function of their phase difference. Modulation amplitude was equated using threshold units and contrast ratios. This study identified three interaction types: (1) a linear and antagonistic rod:S-cone interaction, (2) probability summation, and (3) a previously unidentified mutual nonlinear reinforcement. Linear rod:S-cone interactions occur within the blue-yellow opponent pathway. Probability summation involves signaling by different postreceptoral pathways. The origin of the nonlinear reinforcement is possibly at the photoreceptors.

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Citations

Aug 20, 2015·Documenta Ophthalmologica. Advances in Ophthalmology·Andrew J ZeleJan Kremers
Feb 7, 2015·Frontiers in Psychology·Andrew J Zele, Dingcai Cao
Apr 4, 2014·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Andrew J ZeleDingcai Cao
Apr 1, 2018·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Amithavikram R HathibelagalAndrew J Zele
Aug 22, 2020·Translational Vision Science & Technology·Cord HuchzermeyerJan Kremers
Jul 16, 2021·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Samir UpretyPrakash Adhikari

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