Final answer:
The function of CN II (Optic) is to transmit visual information from the eye to the brain.
Step-by-step explanation:
The function of CN II (Optic) is to transmit visual information from the eye to the brain. It is responsible for carrying the signals received by the light-sensitive retina to the brain, where the processing of visual nerve impulses takes place. The optic nerve is made up of axons of retinal ganglion cells, which carry different qualities of visual signals, such as form, movement, depth, brightness, color, and fine detail.