The retina is connected to the brain by which nerve?

The retina is connected to the brain by which nerve?

• A. Olfactory nerve
• B. Optic nerve
• C. Trigeminal nerve
• D. Vagus nerve

Answer: (B)

The retina communicates with the brain through the optic nerve, which is the cranial nerve dedicated to vision. Retinal ganglion cells send their axons to form this nerve, carrying visual information from each eye toward the brain. From there, the signals travel through the optic chiasm and on to pathways in the visual cortex for processing. The other nerves have different roles—olfactory for smell, trigeminal for facial sensation and chewing, and vagus for autonomic control—so they don’t carry visual information from the retina.

The retina communicates with the brain through the optic nerve, which is the cranial nerve dedicated to vision. Retinal ganglion cells send their axons to form this nerve, carrying visual information from each eye toward the brain. From there, the signals travel through the optic chiasm and on to pathways in the visual cortex for processing. The other nerves have different roles—olfactory for smell, trigeminal for facial sensation and chewing, and vagus for autonomic control—so they don’t carry visual information from the retina.