Pupillary Disorders

PUPIL CONSTRICTION - CAUSES (contd)

The Argyll-Robertson pupil

Small pupils irregular in shape, which do — -"*" not react to light but react to accommodation.

They respond inadequately to pupillary dilator drugs.

Argyll-Robertson pupils are usually synonymous with syphilitic infection, but they may also result from any midbrain lesion - neoplastic, vascular, inflammatory or demyelinative. The Argyll-Robertson pupil has also been described in diabetes and in alcoholic neuropathy as well as following infectious mononucleosis. The lesion could lie in the midbrain, involving fibres passing to the Edinger-Westphal nucleus, in the posterior commissure, or alternatively, in the ciliary ganglion. A central lesion seems most likely.

Investigative approach: - look for associated signs of neurosyphilis - blood serology - VDRL, Captia G.

Drugs

Parasympathomimetic drugs - Carbachol, phenothiazines and opiates produce miosis. N.B Do not confuse with small pupils, normally occuring in the elderly.

Was this article helpful?

0 0
Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.

Get My Free Ebook


Post a comment