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How can you tell if brain injury or disease is causing your pupils to appear large?

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Pressure that builds inside your brain after a head injury, stroke, or tumor can damage the muscles in your iris that normally make your pupils open and close. One or both of your pupils can become fixed in the dilated position and can’t react to light. If that happens, you should see a doctor right away. If you've had a head injury, your doctor or nurse might shine a light into your eye during the exam to see if your pupils get smaller.

From: Why Do My Pupils Look Big? WebMD Medical Reference

SOURCES:

American Academy of Ophthalmology: "Pharmacologic Dilation of Pupil," "What Can Cause A Fixed Pupil?" "What to Expect When Your Eyes Are Dilated."

Benjamin, W., Borish, I. , Butterworth-Heinemann, 2006. Borish's Clinical Refraction

Headway: the Brain Injury Association: "Treatment and Recovery."

Lee, Andrew G., et al. Slack Inc., 2009. Curbside Consultation in Neuro-ophthalmology: 49 Clinical Questions,

Mayo Clinic: "Traumatic brain injury: Tests and diagnosis."

Moorfields Eye Hospital: "Anatomy of the eye."

The Discovery Eye Foundation: "Pupils Respond to More Than Light."

University of Illinois Extension: "Warning Signs and Symptoms of Common Illegal Drugs."

University of Maryland School of Medicine: "Anticholinergic or Sympathomimetic."

Reviewed by Whitney Seltman on August 6, 2019

SOURCES:

American Academy of Ophthalmology: "Pharmacologic Dilation of Pupil," "What Can Cause A Fixed Pupil?" "What to Expect When Your Eyes Are Dilated."

Benjamin, W., Borish, I. , Butterworth-Heinemann, 2006. Borish's Clinical Refraction

Headway: the Brain Injury Association: "Treatment and Recovery."

Lee, Andrew G., et al. Slack Inc., 2009. Curbside Consultation in Neuro-ophthalmology: 49 Clinical Questions,

Mayo Clinic: "Traumatic brain injury: Tests and diagnosis."

Moorfields Eye Hospital: "Anatomy of the eye."

The Discovery Eye Foundation: "Pupils Respond to More Than Light."

University of Illinois Extension: "Warning Signs and Symptoms of Common Illegal Drugs."

University of Maryland School of Medicine: "Anticholinergic or Sympathomimetic."

Reviewed by Whitney Seltman on August 6, 2019

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How can you tell if an eye injury is causing your pupils to appear large?

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