When your pupils contract when exposed to bright light is this a simple reflex?

Yes, the contraction of pupils when exposed to bright light is a simple reflex. This reflex is called the pupillary light reflex. It is an involuntary response that is mediated by the autonomic nervous system. When bright light hits the retina, it causes the pupil to constrict in order to reduce the amount of light entering the eye and protect the retina from damage. The pupillary light reflex is an important part of the body's overall defense mechanism against bright light.