IDNLearn.com is the perfect place to get answers, share knowledge, and learn new things. Ask your questions and receive accurate, in-depth answers from our knowledgeable community members.

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