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Relative Afferent Pupillary Defect (RAPD) is a condition in which pupils respond differently to light stimuli shone in one eye at a time due to unilateral or asymmetrical disease of the retina or optic nerve (only optic nerve disease occurs in front of the lateral geniculate body). Swinging flashlight test or Marcus Gunn test is one of the most ...
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 ...
Sep 23, 2021 · Marcus Gunn pupil refers to the unequal pupillary response to light due to damage or disease in the retina or optic nerve. Examples include retinal detachment, retinal ischemia, optic neuritis, severe glaucoma, trauma, and tumor of the optic nerve, among other causes. If an individual has a Marcus Gunn pupil, the affected pupil will continue to ...
- 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 d...
- Marcus Gunn pupil can be caused by diseases of the retina, including retinal detachment (i.e. where the retina at the back of the eye pulls away fr...
- When a light is shone into an eye with a Marcus Gunn pupil, it will not constrict as much as an unaffected eye, signaling that there is an underlyi...
- The Marcus Gunn pupil can be detected by the swinging light test, a diagnostic test in which a flashlight is moved quickly between both eyes and th...
- Treatment of Marcus Gunn pupils is dependent on the underlying cause. If it is due to optic neuritis, it may improve without any treatment; however...
Aug 16, 2022 · Marcus Gunn pupil is a rare condition in which a person’s pupil does not respond to light correctly in one eye. It is also called Marcus Gunn syndrome or relative afferent pupillary defect (RAPD). In healthy eyes, pupils constrict (get smaller) in bright conditions and dilate (get bigger) in dark conditions. Both pupils constrict together ...
It might also be called relative afferent pupillary defect (RAPD), Gunn’s syndrome or Marcus Gunn sign. Types of Marcus Gunn pupil or RAPD. There are different ways to classify RAPD. Sometimes, professionals refer to a clinical grading system ranging from one to five based on how much your pupil contracts or dilates when exposed to light.
Jun 6, 2023 · Relative Afferent Pupillary Defect (RAPD), also known as Marcus Gunn pupil, is a condition characterized by an abnormal pupillary light reflex due to optic nerve dysfunction or asymmetrical visual pathway impairment. Its causes include a variety of conditions such as optic nerve damage, retinal diseases, or lesions affecting the visual pathway.
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What is a relative afferent pupillary defect (RAPD)?
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The ‘swinging light test’ is used to detect a relative afferent pupil defect (RAPD): a means of detecting differences between the two eyes in how they respond to a light shone in one eye at a time. The test can be very useful for detecting unilateral or asymmetrical disease of the retina or optic nerve (but only optic nerve disease that ...
