Why pupils are constricted in Argyll Robertson?
The Argyll Robertson pupil occurs when a disease interferes with the light reflex pathway, thereby inhibiting the pupil’s natural response to bright light. Specifically, Argyll Robertson pupils don’t constrict in response to light but do constrict to focus on a nearby object.
What are Argyll Robertson pupils?
The Argyll Robertson (AR) pupil has been defined as a pupil that is small and constricts poorly to direct light but briskly when a target within reading distance is viewed (“light-near dissociation”).
Which reflex is present in Argyll Robertson pupil?
They are a highly specific sign of neurosyphilis; however, Argyll Robertson pupils may also be a sign of diabetic neuropathy….
| Argyll Robertson pupil | |
|---|---|
| Risk factors | A highly specific sign of neurosyphilis |
| Diagnostic method | Pupillary light reflex and accommodation reflex tests |
What is Holmes Adie syndrome?
Definition. Holmes-Adie syndrome (HAS) is a neurological disorder affecting the pupil of the eye and the autonomic nervous system.
What is Holmes Adie pupil?
Adie syndrome, or Holmes-Adie syndrome, is a rare neurological disorder affecting the pupil of the eye. In most patients the pupil is larger than normal (dilated) and slow to react in response to direct light. Absent or poor tendon reflexes are also associated with this disorder.
What is a Marcus Gunn pupil?
Marcus Gunn pupil (MGP) is the term given to an abnormal pupil showing aberrant pupillary response in certain ocular disorders. In literature, the term is often used synonymously with Marcus Gunn phenomenon or relative afferent pupillary defect (RAPD). [1] After exposure to bright light, a normal pupil constricts.
What is reverse Argyll Robertson pupil?
Inverse Argyll Robertson Pupil (IARP), absence of pupillary constriction to near stimuli with retention of pupillary light reflex, has rarely been described. Chrousos and colleagues (1985) reported a child with absence of complete near reflex triad.
What is Adie’s pupil?
Adie syndrome is is a neurological disorder affecting the pupil of the eye and the autonomic nervous system. It is characterized by one eye with a pupil that is larger than normal that constricts slowly in bright light (tonic pupil), along with the absence of deep tendon reflexes, usually in the Achilles tendon.