The "Swinging Flashlight Test:" What Your Eye Doctor is Looking For
When the doctor shines a light in your eye, then alternates between eyes, what is he looking for? The doctor is commonly looking for the Marcus Gunn Pupil. What's that?
What is a Marcus Gunn Pupil?
| 1 / 7 | Next |
The Marcus Gunn Sign is a measurement of how the pupils in the eye react to a swinging light. When a bright light is swung from one eye to another, the pupil of the affected eye will constrict less. The Marcus Gunn Signs is also known as Relative Afferent Pupillary Defect.
By — Last Modified: 03/28/2012, First Published: 12/09/2011
