anisocoria


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anisocoria

 [an-i″so-kor´e-ah]
inequality in size of the pupils of the eyes.

an·i·so·co·ri·a

(an-ī'sō-kō'rē-ă), [MIM*106240]
A condition in which the two pupils are not of equal size.
[aniso- + G. korē, pupil]

an·i·so·co·ri·a

(an-ī'sō-kōr'ē-ă)
A condition in which the two pupils are not of equal size.
[aniso- + G. korē, pupil]

anisocoria

Inequality in the size of the pupils of the eye.

anisocoria 

Condition in which the pupils of the eyes are not of equal size. Typically one pupil is abnormal and cannot either dilate or constrict. It may be physiological (e.g. in antimetropia) or it may be part of a syndrome, the most common being those of Adie's and Horner's. Physiological anisocoria remains constant irrespective of the level of illumination. Anisocoria can occur as a result of injury (e.g. to the iris sphincter muscle), inflammation (e.g. iridocyclitis), diseases of the iris, paralysis of the third nerve, angle-closure glaucoma, systemic diseases (e.g. diabetes, syphilis) or accidental drug instillation into the eye (if the drug or substance has anticholinergic properties the condition is then referred to as anticholinergic mydriasis or 'atropine' mydriasis). The search for the cause of anisocoria is facilitated by testing the pupil light reflexes and responses to locally instilled drugs (Fig. A14). See efferent pupillary defect; pupil light reflex; pupillometer.
Fig. A14 Anisocoriaenlarge picture
Fig. A14 Anisocoria
References in periodicals archive ?
As detection of anisocoria requires comparing both pupils, there were therefore 66 paired measurements for the detection of anisocoria.
We report results of cocaine testing and underlying etiologies as well as follow-up data in a cohort of patients younger than 18 years with anisocoria during an 8-year period.
Alacrima is the earliest and most consistent feature and other ophthalmological findings may include optic atrophy or pallor, high astigmatism, and anisocoria [92].
The patient was investigated with head computed tomography (CT) scan because of anisocoria. Cerebral hemorrhage could be excluded.
In this case, the anisocoria was irrelevant to the diagnosis, but, in an emergency situation, with limited history and requirement for urgent transfer and resuscitation, it has the potential to add uncertainty to the diagnosis and appropriate treatment strategy.
Hypoglobus and anisocoria (right-sided mydriasis) are clearly visible symptoms.
A previously healthy 40-year-old woman was referred to us by an ophthalmologist who noticed anisocoria with a small right pupil and a dilated left pupil.
Signs of neurosyphilis are multiple and include hyporeflexia, anisocoria, Argyll Robertson pupils, cranial neuropathy, Romberg sign, Charcot joint, hypotonia, optic atrophy.
The patients who had lateralizing signs, anisocoria, severe headache, vomiting, midline shift of more than 5mm on CT scans, depressed compound fractures and GCS of less than 13 were treated operatively.
On physical exam, he had bilateral conjunctival injection with right anisocoria. There were no other focal findings in the remainder of his head and neck examination.
Patients presenting with low GCS and anisocoria and computed tomography (CT) image showing significant lesions with evidence of uncal herniation [Figure 1] were immediately taken up for surgical evacuation [Figure 2].
He got his different-coloured eyes - caused by the condition anisocoria - through a fight over a girl.