They say the eyes are the window to the soul. Well, maybe. They also happen to be the first organ we (perhaps, unknowingly) examine whenever we encounter a patient. This week on the program, we build on the prior episode about anisocoria (featuring Dr. Ali Hamedani, episode 74) and discuss the examination of the pupil, and all that these 3-5 millimeters of tissue can teach us. Plus, some Dad jokes at the end... Produced by James E. Siegler. Music courtesy of Chris Haugen, Daniel Birch, and Lee Roosevere. Unless otherwise mentioned in the podcast, no competing financial interests exist in the content of this episode. Sound effects by Mike Koenig and Daniel Simion. BrainWaves' podcasts and online content are intended for medical education only and should not be used for clinical decision making. Be sure to follow us on Twitter @brainwavesaudio for the latest updates to the podcast. REFERENCES Bouffard MA. The Pupil. Continuum (Minneap Minn). 2019;25:1194-1214. Liu G, Volpe NJ and Galetta S. Neuro-Ophthalmology: Diagnosis and Management: Elsevier; 2018. https://www.amazon.com/Liu-Volpe-Galettas-Neuro-Ophthalmology-Management/dp/032334044X