You are assessing the pupils of a patient who hit his head after falling from the top of a tractor trailer. What pupillary finding suggests a closed head injury?

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The left pupil constricts to light but the right pupil does not is known as an afferent pupillary defect or Marcus Gunn pupil. This finding suggests a closed head injury, specifically damage to the optic nerve or retina. It is important to further evaluate the patient for other signs of head trauma and consider imaging studies to assess for intracranial injuries.

You Are Assessing the Pupils of a Patient Who Hit