• Binocular vision allows a person to distinguish distances.
• The cornea and lens refract light on the retina.
• The iris regulates the amount of light entering the eye.
• In the retina, sensory cells become irritated and carry information as impulses along the optic nerve to the brain.
• Visual perception occurs in the brain.
• Refractive errors can be corrected with glasses.
• Keywords: vision, binocular vision, lens, retina, optic nerve, refractive error.