Rod cells, or rods, are
photoreceptor cells in the
retina of the
eye that can function in less intense
light than can the other type of photoreceptor,
cone cells. Since they are more light-sensitive, rods are responsible for night vision. Named for their cylindrical shape, rods are concentrated at the outer edges of the retina and are used in
peripheral vision. There are about 120 million rod cells in the human retina.
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the photoreceptor cells in the retina which are responsible for peripheral and night vision (scotopic illumination).
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