Are there more rods or cones in the retina?

Are there more rods or cones in the retina?

• A. Cones
• B. Equal numbers
• C. Rods
• D. Cannot determine

Answer: (C)

Rods outnumber cones in the retina. In humans, there are about 120 million rods compared with roughly 6–7 million cones. This means rods are far more numerous. Rods are spread more widely across the peripheral retina, where they provide high sensitivity and motion detection in dim light. Cones, on the other hand, are concentrated in the fovea at the center of the retina and are responsible for high-acuity, color vision in bright light. So, the larger number of rods explains why there is more rod photoreceptor tissue overall.

Rods outnumber cones in the retina. In humans, there are about 120 million rods compared with roughly 6–7 million cones. This means rods are far more numerous. Rods are spread more widely across the peripheral retina, where they provide high sensitivity and motion detection in dim light. Cones, on the other hand, are concentrated in the fovea at the center of the retina and are responsible for high-acuity, color vision in bright light. So, the larger number of rods explains why there is more rod photoreceptor tissue overall.