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by pluteoid
3783 days ago
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No – significant preprocessing of photoreceptor cell signals occurs in the eye, in the retina. The "raw" signals from the three cone types are processed into luminance and two color-opponent channels before being sent to the visual cortex. (While there are around 130 million retinal receptors, there are only approximately 1.2 million axons bundled in the optic nerve.) |
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