Rods detect night vision.

Rods detect night vision.

• A. Color
• B. Depth
• C. Motion
• D. Night vision

Answer: (D)

Rods are specialized photoreceptors in the retina that work best in very dim light, so they are the key players in night vision. They’re extremely sensitive to light, which lets you see in dark conditions, but they don’t detect color, so vision in low light is grayscale. In bright light, rods quiet down and cones take over for color and detail. While motion and depth involve multiple cues and pathways, the primary function attributed to rods is enabling vision when illumination is low, i.e., night vision.

Rods are specialized photoreceptors in the retina that work best in very dim light, so they are the key players in night vision. They’re extremely sensitive to light, which lets you see in dark conditions, but they don’t detect color, so vision in low light is grayscale. In bright light, rods quiet down and cones take over for color and detail. While motion and depth involve multiple cues and pathways, the primary function attributed to rods is enabling vision when illumination is low, i.e., night vision.