Then there are about 5.5 million cones that respond to brighter light and make possible detailed color vision. Some cones are most sensitive to red light, others to green and others to blue. Their combined response enables you to see all the colors in this magazine. When all three types of cones are excited equally, the color you see is pure white.

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Your retina has millions of neurons, called cones, which are sensitive to green, red, or blue