Canadian Medical Guide > Diseases > Nervous System Diseases > Neurologic Manifestations > Pupil Disorders > Tonic Pupil Terms and Definitions

Tonic Pupil

Medical Definition:	A pupillary abnormality characterized by a poor pupillary light reaction, reduced accommodation, iris sector palsies, an enhanced pupillary response to near effort that results in a prolonged, "tonic" constriction, and slow pupillary redilation. This condition is associated with injury to the postganglionic parasympathetic innervation to the pupil. (From Miller et al., Clinical Neuro-Ophthalmology, 4th ed, pp492-500)
Also Called:	Tonic Pupil, Local,Tonic Pupil, Neuropathic
Previously Indexed:	Photic Stimulation (1972-1989),Pupil (1967-1989)

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