7 reasons why your pupils may be dilated

4. Head and Eye Injury Can Cause Mydriasis

Eyes are delicate, and it’s not surprising to learn that they can be easily injured with long-lasting consequences including mydriasis. An injury that penetrates the eye can damage the nerves that control pupil dilation.A head injury can affect the eyes. Pressure on the brain can easily affect the eye in many ways, including dilation. Damage to the third cranial nerve, which controls eye muscles, can result in mydriasis as well. Physicians who are treating injury victims will closely monitor their eyes for signs of additional injury that may require surgery. Surgery can often repair eye damage. Follow-up care includes wearing eyepatches, medication, and eye drop treatment.