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).
References in periodicals archive ?
Mydriatic pupil observed in the iris which appears to have a normal structure is named congenital mydriasis or familial iridoplegia. Other causes which lead to bilateral mydriasis include toxic conditions (atropine intoxication, Parkinson drugs, antidepressants, carbonmonoxide intoxication, cocaine), conditions secondary to morbidities (migraine, schizophrenia, hyperthyroidism, coma) and Parinaud oculoglandular syndrome.
The apamin has been implicated in the development of ophthalmoplegia (secondary to neuroparalysis of the third cranial nerve), iridoplegia, optic neuritis, papilledema and optic atrophy (2).