Understanding Relative Afferent Pupillary Defect (RAPD) & Marcus Gunn pupil
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- Опубликовано: 2 авг 2024
- In this informative video, we dive deep into the fascinating world of Relative Afferent Pupillary Defect (RAPD) and its association with Marcus Gunn Pupil. Whether you're a medical professional, student, or simply curious about eye conditions, this video will provide you with valuable insights.
Argyl Robertson Pupil, named after the Scottish ophthalmologist Sir William Argyl Robertson, is a peculiar eye condition characterized by bilateral, small, and irregular pupils that react poorly to changes in light but constrict when the patient focuses on a nearby object. This unique behavior of the pupils is often referred to as "light-near dissociation." Argyl Robertson Pupils are associated with several underlying medical conditions, with neurosyphilis being one of the most well-known causes. These unusual pupils can also be seen in other neurological disorders. The presence of Argyl Robertson Pupils can be a valuable diagnostic clue for healthcare professionals, indicating the need for further evaluation to uncover the underlying cause. Understanding the characteristics and clinical significance of this phenomenon is essential in the fields of ophthalmology and neurology.
This video shall be a part of the series on abnormal pupillary reactions.
Topics Covered:
What is RAPD? - We'll explain the basics of Relative Afferent Pupillary Defect, its causes, and how it's diagnosed.
Marcus Gunn Pupil Explained - Gain a comprehensive understanding of Marcus Gunn Pupil, its symptoms, and how it's related to RAPD.
Clinical Significance - Discover why RAPD and Marcus Gunn Pupil are crucial in the field of ophthalmology and neurology.
Diagnosis and Assessment - Learn about the tests and techniques used to identify and quantify RAPD especially the swinging flash light test.
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IMPORTANT LINKS
Abnormal pupillary reaction #1 (Marcus Gunn Pupil):-
• Understanding Relative...
Abnormal pupillary reaction #2 (Wernicke's Hemianopic pupil )
• WERNICKE'S HEMIANOPIC ...
Abnormal pupillary reaction #3 ( ARGYL ROBERTSON PUPIL )
• PUPILLARY LIGHT REFLEX...
Abnormal pupillary reaction #4 (Adie tonic Pupil)
• PUPILLARY LIGHT REFLEX...
Abnormal pupillary reaction#5 (Understanding Light Near Dissociation)
LINK to Pupillary/ Light reflex pathway
• PUPILLARY LIGHT REFLEX...
#abnormalpupilseries
#neurophthalmology
#ophthalmology
#RAPD
#MARCUSGUNNPUPIL
TIMESTAMPS
00:13 Abnormal pupillary reaction series #1 RAPD
00:50 CAUSES of RAPD
02:40 Swinging flash light Test
06:03 REVERSE RAPD
08:55 GRADES OF RAPD
Most comprehensive video on RAPD 😊 Thank you ma'am
Wow, I have been looking for an understandable explanation on RUclips for half a day now. Could not find one that explained it so clearly. Thank you so so much. This is the epitome of a good teacher. Thank you.
You're very welcome!
Thank you thank you and thank you ❤❤❤❤❤❤❤
Thankyou so much TT thanks alot. I was soo confused
Glad it helped!
Thankyou sooo much mam
Good lekcher
In Marcus Gunn pupil is accomodation intact ??
Epic explanation mam👍👍👍
In reverse RAPD if RE has efferent defect and intact afferent why stimulation from RE will be less to the left side during concensual light refelx??
Hi Abhishek! From what I understood from your question; I think you are asking about the efferent and afferent status in RE
In RE both are affected..
To understand this we have to also understand the pupillary pathway.
Each afferent limb has two efferent limbs, one ipsilateral and one contralateral. The ipsilateral efferent limb transmits nerve signals for direct light reflex of the ipsilateral pupil. The contralateral efferent limb causes consensual light reflex of the contralateral pupil.
So here the RE Efferent is affected so no direct reflex. Now we need to check if afferent is also affected or not?
For this we rely on the other eye consensual response..
If the other eye consensual is absent, it means either the RE afferent is defective or LE efferent.
( You can exclude LE efferent defect as the pupil is nicely constricting to direct light...right?
So it means we have a RE afferent defect !
Left eye Right eye mismatch is there in the explanation vs the image that has been put up in the swinging light test slide
At what timing?
Was looking for this comment. She switched it up. It is clearly written that the LE is normal and the RE has the defect
Ma’am have you made a mistake in swinging flashlight test ? 3rd row RE you have written constrain consensually but it’s direct reflex only in right eye also. Please clear my doubt. Time3:35
When we carry out a swinging flash light test, we are conducting both direct and indirect test together .
But yes the labelling in the book is wrong, the RE is showing construction due to the direct reflex and the left eye is showing constriction due to indirect/ consensual response..
I hope that is clear😊
When we carry out a swinging flash light test, we are conducting both direct and indirect test together .
But yes the labelling in the book is wrong, the RE is showing construction due to the direct reflex and the left eye is showing constriction due to indirect/ consensual response..
I hope that is clear😊
Thank you ma’am