Cranial Nerve II is associated with which sensory function?

Cranial Nerve II, also known as the optic nerve, is primarily responsible for the sensory function of vision. It carries visual information from the retina in the eye to the brain, where it is processed to form images. This nerve is crucial for allowing individuals to perceive their environment through sight, enabling activities like reading, recognizing faces, and reacting to visual stimuli.

The other options provided do not accurately describe the function of Cranial Nerve II. For instance, the sense of smell is associated with Cranial Nerve I (olfactory nerve), voice and speech functions are related to Cranial Nerves IX (glossopharyngeal) and X (vagus), while eye movement is governed by several other cranial nerves, specifically Cranial Nerve III (oculomotor), IV (trochlear), and VI (abducens). Therefore, Vision aligns specifically with the role of Cranial Nerve II, establishing it as the correct answer to the question.