Which nerve is responsible for eye movement and dilation of the pupil?

The oculomotor nerve is primarily responsible for controlling eye movements and the dilation of the pupil. As one of the cranial nerves, it innervates several extraocular muscles, which enable the eye to move in various directions. This nerve also carries parasympathetic fibers that are involved in pupil constriction and lens accommodation, allowing the eye to focus on near objects.

Understanding the role of the oculomotor nerve is crucial for recognizing its involvement in both motor and autonomic functions of the eye. The oculomotor nerve is part of the complex system that governs visual processing, which is essential for activities such as reading and focusing on objects at different distances.