Anisocoria (Unequal Pupils)
August 18th, 2017
Anisocoria
Look For
- Unequal pupils.
Ask about whether the patient has had unequal pupils in the past, or if they have an old ID photo to compare to.
Causes of Anisocoria
- Physiological (20% of the population)
- Migraine
- Post-ictal
- Horner's syndrome (unilateral)
- Drugs applied to one eye - pilocarpine, tropicamide, cocaine
- Intraocular conditions - glaucoma, retinal detachment
- Oculomotor (III) nerve lesion - nerve trauma, nerve compression, optic neuritis, Guillain barré
- Adie's tonic pupil
- CNS lesion - head trauma, intracranial tumour, subarachnoid haemorrhage, ischaemic stroke, multiple sclerosis
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