The center of the retina contains a mixture of about 75 percent rods and 25 percent cones.

Name: The center of the retina contains a mixture of about 75 percent rods and 25 percent cones.
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The center of the retina, known as the fovea, actually contains a very high density of cones and very few rods. In fact, there are no rods at all in the very center of the fovea. The ratio of cones to rods varies in different parts of the retina, but in general there are more rods than cones overall.

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