Which structure contains rods and cones?

Which structure contains rods and cones?

• A. Iris
• B. Cornea
• C. Retina
• D. Lens

Answer: (C)

Rods and cones are the photoreceptor cells that detect light and color. They reside in the retina, the light-sensitive tissue lining the back of the eye. When light reaches the retina, these cells convert it into electrical signals that travel through the retinal layers to the optic nerve and onward to the brain for visual processing. Rods handle low-light and peripheral vision, while cones handle daylight and color vision, and both types are confined to the retina. The iris controls pupil size, the cornea is the clear front surface that helps focus light, and the lens further focuses light onto the retina—none of these contain rods and cones. Hence, the structure that contains rods and cones is the retina.

Rods and cones are the photoreceptor cells that detect light and color. They reside in the retina, the light-sensitive tissue lining the back of the eye. When light reaches the retina, these cells convert it into electrical signals that travel through the retinal layers to the optic nerve and onward to the brain for visual processing. Rods handle low-light and peripheral vision, while cones handle daylight and color vision, and both types are confined to the retina. The iris controls pupil size, the cornea is the clear front surface that helps focus light, and the lens further focuses light onto the retina—none of these contain rods and cones. Hence, the structure that contains rods and cones is the retina.