Rods are responsible for vision at low light levels, do not mediate color vision, and have low spatial acuity. Rods are more sensitive to light than cones. The cones are active at higher light levels and are capable of color vision and are responsible for high spatial acuity which results in sharp images. Rhodopsin is the light-sensitive pigment found in rods. Rhodopsin molecules break down into a protein called opsin and an organic compound called retinal that produces vitamin A. Iodines are the light-sensitive pigments of cone cells. They contain different proteins than those