traumatic mydriasis

Is Traumatic Mydriasis Permanent? Traumatic mydriasis: Direct blunt trauma to the sphincter muscle of the iris can cause traumatic mydriasis. Symptoms include eye pain, blurry vision and photophobia. Contusion of the muscle results in a transient mydriasis, while tears to the muscle fibers can cause permanent injury. How long does traumatic mydriasis last? transient traumatic