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Related Experiment Videos

The Argyll Robertson pupil.

H Stanley Thompson1, Randy H Kardon

  • 1Neuro-opthalmology Unit, Department of Opthalmology and Visual Sciences, University of Iowa Hospitals and Clinics, Iowa City, USA. thompson@ginniff.com

Journal of Neuro-Ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society
|July 18, 2006
PubMed
Summary
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The Argyll Robertson pupil, characterized by light-near dissociation, may stem from peripheral nerve damage rather than a central midbrain lesion. Further examination is needed to pinpoint the exact cause of this specific pupillary abnormality.

Area of Science:

  • Ophthalmology
  • Neurology

Background:

  • The Argyll Robertson (AR) pupil is defined by poor reaction to light and brisk constriction to near stimuli.
  • Traditional understanding attributes the AR pupil to dorsal midbrain lesions, sparing the near reflex pathway.

Purpose of the Study:

  • To investigate the underlying mechanism and precise localization of the syphilitic lesion causing the AR pupil.
  • To differentiate AR pupil from tonic pupils seen in Adie syndrome and other neuropathic conditions.

Main Methods:

  • Reviewing the diagnostic features of the AR pupil, including segmental iris sphincter constriction and tonic features.
  • Comparing the clinical presentation of AR pupils with those of Adie syndrome and tonic pupils.

Main Results:

Related Experiment Videos

  • The AR pupil typically lacks segmental iris sphincter constriction and tonic features, unlike typical tonic pupils.
  • The traditional dorsal midbrain lesion theory for AR pupils is questioned due to lack of consistent evidence in syphilis.

    • Conclusions:

    • The AR pupil's mechanism may involve peripheral denervation (ciliary ganglion or nerves) rather than a central midbrain lesion.
    • Screening patients with bilateral tonic pupils for syphilis is recommended until the AR pupil's localization is definitively established.