The nerve that transmits visual information from the retina to the brain is the

The nerve that transmits visual information from the retina to the brain is the

• A. Iris
• B. Cornea
• C. Optic nerve
• D. Lens

Answer: (C)

Vision starts with photoreceptors in the retina, and the signals they generate travel via retinal ganglion cell axons that come together to form the optic nerve. This nerve exits the eye and carries the information toward the brain, first synapsing in the lateral geniculate nucleus of the thalamus and then reaching the visual cortex for processing. The other structures listed—iris, cornea, and lens—are parts of the eye that control light entry and focus, not neural transmission. The optic nerve is the pathway that conveys the visual signal to the brain.

Vision starts with photoreceptors in the retina, and the signals they generate travel via retinal ganglion cell axons that come together to form the optic nerve. This nerve exits the eye and carries the information toward the brain, first synapsing in the lateral geniculate nucleus of the thalamus and then reaching the visual cortex for processing. The other structures listed—iris, cornea, and lens—are parts of the eye that control light entry and focus, not neural transmission. The optic nerve is the pathway that conveys the visual signal to the brain.