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 …

Relative afferent pupillary defect (RAPD) is a condition in which pupils respond differently to light stimuli shone in one eye at a time. This response is due to unilateral or asymmetrical disease of the retina or optic nerve (only optic nerve disease occurs in front of the lateral geniculate body).

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.

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, is a critically important ophthalmological examination finding that defines a defect ( pathology) in the pupil pathway on the afferent side.

Nov 9, 2017 · RAPD is an inexpensive yet powerful typing method for many bacterial species. Silver-stained polyacrylamide gel showing three distinct RAPD profiles generated by primer OPE15 for Haemophilus ducreyi isolates from Tanzania, …

Aug 15, 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.

Jun 6, 2023 · Relative Afferent Pupillary Defect (RAPD) is a curious condition that offers a unique display of visual physiology. Its signs are subtle, and while its symptoms may often be silent, it is a beacon pointing towards more profound ocular or neurological issues.

Jun 23, 2019 · The relative afferent pupillary defect (rAPD) is an important finding on the neurological exam, and is essentially characterized by alternating pupillary dilation and constriction as you move a bright light between the patient’s eyes.

Jul 5, 2024 · RAPD occurs when there is a difference in the amount of light reaching each eye, typically due to optic nerve or retinal dysfunction. When a bright light is shone into both eyes, the affected eye with RAPD will dilate instead of constricting, indicating a reduced or impaired pupillary light reflex.