A cranial nerve VI palsy will cause what type of deviation?

A cranial nerve VI palsy results in the weakness or paralysis of the lateral rectus muscle, which is responsible for abducting the eye (moving it outward). When this muscle is affected, the eye on the affected side cannot move outward properly. As a result, when a person with cranial nerve VI palsy attempts to gaze straight ahead (particularly at a distance), the affected eye will tend to drift inward toward the nose, leading to esodeviation. This inward turning is more notable during distance viewing because at near distances, the convergence (inward movement) of both eyes for focusing can mask the misalignment to some extent. Hence, the correct description of the type of deviation caused by a cranial nerve VI palsy is esodeviation that is worse when the patient is looking at distant objects.