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Argyll Robertson pupil (ARP)

 " ARP "

The acronym ARP can stand for  'accomodation reflex present'.
Thus in Argyll Robertson pupil (ARP) , accomodation reflex (near reflex) is present but light reflex is absent.
Argyll Robertson pupil results from damage to relay paths in tectum between the afferent and efferent tracts. In this region, the lesion is almost invariably syphilitic.

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