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| __NOTOC__
| | #REDIRECT [[Mydriasis]] |
| {{Infobox_Disease |
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| Name = {{PAGENAME}} |
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| Image = Pupillary dilation.jpg |
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| Caption = Pupillary dilation |
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| }}
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| {{Search infobox}}
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| {{CMG}}
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| ==Overview==
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| The action of the iris dilator muscle is controlled by the sympathetic system, which in turn controls '''pupillary dilation'''. The superior cervical ganglion is the source of the third order neuron and follows the internal cartoid artery brances.<br> Sympathetic activity that goes unopposed can cause unequal pupil size.
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| ==Causes==
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| ===Causes in Alphabetical Order<ref>Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016</ref><ref>Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X</ref>===
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| *[[Acute Closed Angle glaucoma]]
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| *[[Adie's tonic pupil]]
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| *Adregenic agents
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| *[[Benign episodic mydriasis]]
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| *[[Coma]]
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| *[[Congenital mydriasis]]
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| *Drug withdrawal
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| *[[Hallucinogens]]
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| *[[Seizure]]s
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| *[[Serotonin syndrome]]
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| *Systemic [[anticholinergics]]
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| *[[Third nerve palsy]]
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| *[[Trauma]]
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| == Diagnosis ==
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| === History and Symptoms ===
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| *Complete history with special attention to:
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| :*neurologic
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| :*Ophthalmologic
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| :*Otolaryngologic
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| === Physical Examination ===
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| === Eyes ===
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| *Pupil size (light & dark)
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| *Pupil response to light and convergence
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| *Lid position
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| ===MRI===
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| *MRI to check for [[third cranial nerve palsy]]
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| ==Treatment==
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| ===Medical Therapy===
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| *[[Adie's pupil]] - Pilcarpine .125% BID-QID
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| *Migraines - pain meds, antidepressants, anticonvulsants, beta blockers, calcium channel blockers
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| ===Primary Prevention===
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| *Remove causative medication
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| *Sunglasses to decrease light sensitivity
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| ==References==
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| {{reflist|2}}
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| {{WikiDoc Help Menu}}
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| {{WikiDoc Sources}}
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| [[Category:Ophthalmology]]
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| [[Category:Signs and symptoms]]
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| [[Category:Neurology]]
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| [[Category:Physical examination]]
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| [[Category:Emergency medicine]]
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