What are the cones and rods in the retina for?

Light perception: The retina has 10 layers and the bottom layer is made up of the rods-that perceive light and dark and movement, and the cones-that perceive color. Cones are mainly in our center vision and rods in the side vision. Light hits the rods and cones (called photoreceptors) and they convert the light signals into electro-chemical signals that are transmitted to the brain.

Vision: Rods are mostly in our outer retina and sense motion and night vision, but no detail. Cones are in the central retina and sense color and detail.