Medicine:Mechanical anisocoria

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Mechanical anisocoria
Iris Dilator Muscle 012909.jpg
Iris Dilator Muscle

In mechanical anisocoria, this is the result of damage to the iris dilator muscle, which may be caused by trauma, angle-closure glaucoma, surgery such as cataract removal, or uveitis (inflammation of the eye). Slit lamp examination is often used as a diagnostic aid: damage to the dilator muscle is indicated by anisocoria when light intensity is lowered.[1] Anisocoria refers to a common eye condition in which the two pupils differ in size.


  1. Mechanical Anisocoria. "Causes of Anisocoria". Medscape. Retrieved 3 November 2015.