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MYDRIASIS |
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topical mydriatics, eg. atropine, homatropine, tropicamide, cyclopentolate
sympathomimetic drugs, anti-cholinergic drugs, eg. tricyclic antidepressants 3rd nerve lesion (pupil may not be dilated with an incomplete lesion) Holmes-Aide syndrome ['myotonic pupil'; dilated pupil responding sluggishly to light; absent tendon reflexes]phaeochromocytoma retrobulbar neuritis / optic atrophy congenital |
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IN UNCONSCIOUS PATIENT: |
temporal lobe herniation due to raised ICP (3rd nerve palsy)intra-cranial bleeding, tumour or abscess (3rd nerve palsy)tricyclic anti-depressant overdose cocaine ecstasy and other amphetamines |
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