Define Rods and cones. Rods and cones synonyms, Rods and cones pronunciation, Rods and cones translation, English dictionary definition of Rods and cones. the elongated cells or elements of the sensory layer of the retina, some of which are cylindrical,
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Rods are responsible for dimly lit vision, whereas cones are for high acuity, central vision, and color vision. Cones are highly enriched in the center of the retina, called the macula, in humans and some birds. Cone photoreceptor degeneration is the ultimate cause of clinically significant ...
Each eye contains about 120 million rods(杆), which provide somewhat blurry black and white vision. These are the windows of night vision; once adapted to the dark, they can detect a candle burning ten miles away. Color vision in each eye comes from six to seven million ...