Final answer:
The nerve responsible for the oculocardiac reflex is the vagus nerve.
Step-by-step explanation:
The nerve responsible for the oculocardiac reflex is the vagus nerve. This reflex occurs when pressure is applied to the eyeball, causing a decrease in heart rate. The sensory component of the reflex travels through the trigeminal nerve, which carries somatosensory information from the face, or through the optic nerve if the stimulus is bright light. The motor response travels through the facial nerve and innervates the orbicularis oculi on the same side.