Rods and cones can see two different colors. Rods see black and white, and cones see in color. The brain is what combines both images, so that you see all colors. Other parts of the eye carrying significance are the lateral rectus, medial rectus, superior rectus, inferior rectus, inferior oblique and superior oblique. Each one of these has a job.
Lateral rectus moves the eye vertically.
Medial rectus moves the eye medially. The superior rectus rolls the eye upward, while the inferior rectus rolls the eye downward. The inferior oblique turns the eye laterally, and the superior oblique turns the eye to each side. Working together these parts help you see. Depth is a very important topic as well when discussing the eye.