Question:medium
All of the following are seen in Argyll Robertson pupil EXCEPT:
All of the following are seen in Argyll Robertson pupil EXCEPT:
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Light near dissociation kills both light reflexes; the consensual normal claim is the odd one out.
Updated On: Jun 24, 2026
- Near reflex normal
- Direct light reflex absent
- Consensual light reflex normal
- Visual acuity normal
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The Correct Option is C
Solution and Explanation
The defining quirk of the Argyll Robertson pupil is light near dissociation, a hallmark of neurosyphilis. The pupil ignores a light stimulus yet still constricts crisply when the eyes focus on a near target. Keeping this rule in mind makes the true and false statements fall out cleanly.
Because the problem lies in the light reflex arc, every light driven response is blunted. That means both the direct response in the stimulated eye and the consensual response in the opposite eye are lost. Therefore the line claiming the consensual light reflex stays normal is incorrect, and since the question seeks the exception, that is the choice to mark.
The accommodation response survives, so a normal near reflex is correct, and the absent direct light reflex is correct. Vision itself is generally unaffected because the sensory visual pathway is intact, so normal visual acuity is also correct. The single wrong statement is the preserved consensual light reflex.
\[\boxed{\text{Consensual light reflex normal}}\]
Because the problem lies in the light reflex arc, every light driven response is blunted. That means both the direct response in the stimulated eye and the consensual response in the opposite eye are lost. Therefore the line claiming the consensual light reflex stays normal is incorrect, and since the question seeks the exception, that is the choice to mark.
The accommodation response survives, so a normal near reflex is correct, and the absent direct light reflex is correct. Vision itself is generally unaffected because the sensory visual pathway is intact, so normal visual acuity is also correct. The single wrong statement is the preserved consensual light reflex.
\[\boxed{\text{Consensual light reflex normal}}\]
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