Feb 4, 2025 · Marcus Gunn pupil, also referred to as a relative afferent pupil defect (RAPD), is a rare condition in which an individual’s response to light is different than expected in only one eye.

A relative afferent pupillary defect (RAPD), also known as a Marcus Gunn pupil (after Robert Marcus Gunn), is a medical sign observed during the swinging-flashlight test [1] whereupon the patient's pupils excessively dilate when a bright light is swung from the unaffected eye to the affected eye. The affected eye still senses the light and ...

Marcus Gunn pupil, a type of relative afferent pupil defect, may mean optic nerve or retinal damage. Your provider finds Marcus Gunn pupil by using the swinging flashlight test.

Aug 25, 2023 · Marcus Gunn pupil (MGP) is the term given to an abnormal pupil showing aberrant pupillary response in certain ocular disorders. In literature, the term is often used synonymously with Marcus Gunn phenomenon or relative afferent pupillary defect (RAPD).[1]

Jun 25, 2013 · The Marcus Gunn pupil, named after a Scottish physician is important to learn. Here we show you how to use a flashlight to test for it and what causes this pupillary defect.

A relative afferent pupillary defect (RAPD) also known as a Marcus Gunn pupil, is a critically important ophthalmological examination finding that defines a defect ( pathology) in the pupil pathway on the afferent side.

Jul 11, 2023 · Marcus Gunn pupil is a rare condition that affects the eyes, causing each to respond differently when a light is shone into them. Treatment typically focuses on the cause of Marcus...

Oct 18, 2017 · Marcus Gunn pupil is when the eye's pupil only slightly contracts or dilates when light shines over it, instead of shrinking immediately like it should.

Jun 18, 2023 · A Marcus Gunn pupil, also known as a relative afferent pupillary defect (RAPD), is a non-specific sign on physical examination that indicates partial optic nerve dysfunction. It is mainly due to unilateral optic neuropathy (e.g. optic neuritis), or …

Marcus Gunn pupil refers to an abnormal response of the pupil to light, which indicates a problem with the optic nerve or its pathway. It is most commonly detected during a clinical examination known as the "swinging flashlight test."