How The Human Eye and Brain Work Together To See Color 4 3
The human eye and brain work together to change visible light into color. Special light receptors in the eye's retina transmits messages along the optic nerve to the brain's occipital lobe, which produces the familiar sensations of color . Here's how it works.
Considered to be part of the brain itself, the retina is covered by millions of light-sensitive cells, some shaped like rods and some shaped like cones. These photo receptor cells process the light striking the retina into nerve impulses and pass them along to the brain via the optic nerve. Rods are most highly concentrated around the sides of the retina. There are over 120 million of rod cells in each eye. Cones are concentrated in the middle of the retina. There are over 6 million cone cells in each eye.
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