Question

The pupil opens and closes automatically in response to light.What part of your nervous system controls this response and is it voluntary or involuntary

Answer 1

Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve. Involuntary reflex reaction to exposure or inexposure to light—in low light conditions a dilated pupil lets more light into the eye. :)