iridoplegia

ir·i·do·ple·gi·a

(ir'i-dō-plē'jē-ă), Paralysis of the musculus sphincter iridis. Synonym(s): iridoparalysis [irido- + G. plēgē, stroke]

ir·i·do·ple·gi·a

(ir'i-dō-plē'jē-ă) Paralysis of the musculus sphincter iridis.
Synonym(s): iridoparalysis. [irido- + G. plēgē, stroke]

iridoplegia

Paralysis of the sphincter muscle of the iris resulting in a dilated pupil. The iridoplegia can be partial as in Argyll Robertson pupil, or complete in which case the pupil does not react to light or to a near object. It may be due to trauma, drugs (e.g. cocaine instilled in the eye) or a systemic disease (e.g. neurosyphilis).