GENERAL HISTOLOGY

Detailed explanation-1: -Cranial nerves III (CNIII) (oculomotor), IV (trochlear ), and VI (abducens ) control the position of the eyeballs; CNIII influences the position of the eyelids and the size of the pupils.

Detailed explanation-2: -The oculomotor nerve, also known as the third cranial nerve, cranial nerve III, or simply CN III, is a cranial nerve that enters the orbit through the superior orbital fissure and innervates extraocular muscles that enable most movements of the eye and that raise the eyelid.

Detailed explanation-3: -Cranial Nerves 2 & 3-Pupillary Light Reflex The afferent or sensory limb of the pupillary light reflex is CN2 while the efferent or motor limb is the parasympathetics of CN3. Shine a flashlight into each eye noting the direct as well as the consensual constriction of the pupils.

Detailed explanation-4: -The abducent nerve enervates a muscle, which moves the eyeball.