What type of functions does the facial nerve (CN VII) NOT control?

The facial nerve (CN VII) is primarily responsible for controlling several important functions related to facial expression, taste sensation from the anterior two-thirds of the tongue, and glandular activities such as tear production (via the lacrimal glands) and salivation (via the submandibular and sublingual glands).

When considering the type of functions the facial nerve does not control, vision is clearly outside of its purview. The functions of vision are primarily managed by the optic nerve (CN II) and are associated with the eyes and the brain areas responsible for visual processing. The facial nerve does not influence the mechanics of vision or control any structures related to it, making it the clear answer.

In contrast, functions such as facial expressions, taste from the anterior tongue, and gland functions are all intricate roles of the facial nerve, reinforcing its critical position in both sensory and motor capacities within the cranial nerve framework.