Rods and cones

(Anat.)

the elongated cells or elements of the sensory layer of the retina, some of which are cylindrical, others somewhat conical.

rods and cones

The photoreceptor cells of the retina. They are between the pigment epithelium and the bipolar layer of neurons. The rods contain rhodopsin, which is stimulated by light; the cones contain one of three other photopigments, which are stimulated by various wavelengths of visible light (colors). See: cone (2); night vision; rod

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