Another reflex associated with the cranial nerve III is the accommodation reflex. At rest, the lens is thin, to allow the eye to focus on far objects. To focus on near objects, the lens must thicken, by a process called accommodation, as described in Chapter 7.

What part of the brain controls accommodation?

One of these, located in the frontal cortex, sends motor commands to neurons in the oculomotor nucleus controlling the… The ciliary effect is called accommodation (focusing the lens for near or far vision), and the rectus effect is called convergence (moving the entire eyeball).

Which cranial nerve is responsible for movement of eyeball and power of accommodation?

The oculomotor nerve is the third cranial nerve (CN III). It enters the orbit through the superior orbital fissure and innervates extrinsic eye muscles that enable most movements of the eye and that raise the eyelid.