The retina is a light-sensitive layer of tissue lining the inner surface of the eye; it receives light and sends the image to the brain. The eye is like a camera. The lens in the forward part of the eye focuses light on the retina. You can consider the retina something like the film in a camera.
Placed on the back section of the eye, the retinais the inner layer and contains nerve fibers and light-sensitive cells...
There are two types of light-sensitive cells in the retina: rods and cones..
The rods are responsible for vision in low light conditions, even though they are sensitive to all visible wavelengths of the spectrum; they contain only one pigment and cannot distinguish colors.
The cones are responsible for color vision, as well as sharp vision. Each cone is sensitive to the wavelengths of one of the three primary colors, read, green or blue, in bright light conditions.
When the light rays fall on the retina, the rods and cones are stimulated and produce electrical pulses which are the beginning for the creation of more nerve pulses to the nerve cells, of which they are extensions. These nerve pulses are transmitted to the brain through the optic nerve. The chromophore cells behind the rods and cones absorb light rays and prevent their reflection within the eye.
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