Marcus Gunn pupil, also known as a relative afferent pupillary defect (RAPD), occurs when the pupil only contracts or dilates slightly instead of immediate shrinking when light shines on it. A Marcus Gunn pupil doesn’t typically have symptoms of its own while It’s often an indicator of other ocular conditions. The current article briefly discusses this ophthalmic condition. Marcus Gunn pupil is named after Robert Marcus Gunn, a Scottish ophthalmologist from the 1800s. There are different severities of Marcus Gunn pupil including: Mild RAPD: The affected pupil shows a weak initial contraction before dilating to a larger size.
Moderate RAPD: The affected pupil shows an unchanged contraction before dilating. Severe RAPD: The affected pupil dilates to a larger size immediately. Symptoms that may accompany Marcus Gunn pupil include blurry vision, vision loss, and headache. Therefore, a…
