Discover a wealth of information and get your questions answered on IDNLearn.com. Join our interactive community and get comprehensive, reliable answers to all your questions.

The pupillary light reflex involves shining direct light into the eye to cause constriction of the pupil. This pupillary constriction is primarily due to which of the following?
- Parasympathetic Input
- Somatic Reflex
- Referred Pain
- Sympathetic Input