Question

What is the significance of light sensitive cells the rods and the cones .what is blind spot?

Answer 1

Answer:

Rods are responsible for vision at low light levels (scotopic vision). They do not mediate color vision, and have a low spatial acuity. Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity. The central fovea is populated exclusively by cones.

Answer 2

Answer:

The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for colour vision. In a dim room, however, we use mainly our rods, but we are "colour blind." Rods are more numerous than cones in the periphery of the retina.