There are 12 pairs of nerves in the Central Nerve System, a left and a right nerve for each nerve type. Some control muscles and others control senses. The Visual Processing Center of the brain is the Occipital Lobe with different areas of the lobe affecting different areas in the visual field.
Four Cranial Nerve pairs control the eyes themselves, including; the Optic Nerve, the Oculomotor Nerve, the Trochlear Nerve and the Abducens Nerve.
CNII (Cranial Nerve 2), carries Vision to the brain. This nerve does not contain Schwann cells.
CN3, (Cranial Nerve 3) has two functions it controls:
CN IV (Cranial Nerve 4), controls eyeball movement, rotational, up, down, left and right.
Lateral Rectus Muscle: lateral vision - left to right