|MadSci Network: Neuroscience|
Actually, the color that the eye is most sensitive to is green (actualy blue-green), with a "spectral sensitivity" peaking at 500 nm (green). However, this green light sensitivity, detected by the rods in the periphery of the eye, is interpreted by the brain as "white," forming a black and white image. Rods are 10-100 times as sensitive to light (in terms of photons absorbed) as cones, which respond to three different colors of light, red, green and blue. Processing of color vision is extrmely complex, following a combination of two types of processing: color oponency and trichromatic processing. This occurs initially at the ganglion cell level (contained in the retina of the eye) and allows cells to differentiate between colors by using input from two sets of cones, thus differentiating between the two colors by being stimulated or inhibited. Ultimately, the brain can only perceive what the retina of the eye relays to it. While your brain does some "image enhancement" such as edge detection, it is still constrained by the sensitivities of each of its photoreceptors.
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