Rod contributions to color perception: Linear with rod contrast

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Abstract

At mesopic light levels, an incremental change in rod activation causes changes in color appearance. In this study, we investigated how rod mediated changes in color perception varied as a function of the magnitude of the rod contrast. Rod-mediated changes in color appearance were assessed by matching them with cone-mediated color changes. A two-channel four-primary colorimeter allowed independent control of the rods and each of the L-, M- and S-cone photoreceptor types. At all light levels, rod contributions to inferred PC, KC and MC pathway mediated vision were linearly related to the rod incremental contrast. This linear relationship could be described by a model based on primate ganglion cell responses with the assumption that rod signals were conveyed via rod-cone gap junctions at mesopic light levels. © 2008 Elsevier Ltd. All rights reserved.

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Cao, D., Pokorny, J., Smith, V. C., & Zele, A. J. (2008). Rod contributions to color perception: Linear with rod contrast. Vision Research, 48(26), 2586–2592. https://doi.org/10.1016/j.visres.2008.05.001

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