Dr.parthasarathy memorial eye hospital on Instagram: "Relative Afferent Pupillary Defect (RAPD), also called a Marcus Gunn pupil, is an important sign doctors check during an eye examination. It occurs when one eye’s optic nerve or severe retinal pathways are not working properly, so the pupils respond unequally to light. When a light is shone in the healthy eye, both pupils constrict normally. But when the light is moved to the affected eye, the pupils paradoxically dilate instead of constricti

This is called a “Marcus Gunn” pupil and the test is the swinging flashlight test. Before I go on, this truly awesome video example is from @maxneurovet.  He has a membership to learn more about veterinary neurology on Skool too!  Check him out!ALSO 🎉The Ultimate Veterinary Notes bundle has a helpful section that dives further into PLR interpretation.  👉Comment “PLR” to learn more. EXPLANATION (and hopefully I got this right….)The lesion is in the “AFFERENT” pathway of the Right eye and the pa