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How is Horner's syndrome diagnosed?

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Your doctor or an eye doctor (ophthalmologist) can do tests to see if you have Horner's syndrome.

They'll do a physical exam and ask about your medical history to find out if you've had any illness or injury that could have caused nerve damage.

Then they'll put drops in your eyes to see how your pupils react. If you have Horner's syndrome, one pupil won't widen or shrink as much as it should when the drops go in.

From: What Is Horner Syndrome? WebMD Medical Reference

SOURCES:

Mayo Clinic: "Horner syndrome."

National Organization for Rare Disorders: "Horner syndrome."

Genetics Home Reference: "Horner syndrome."

American Academy of Ophthalmology: "Horner syndrome."

Reviewed by Whitney Seltman on August 6, 2019

SOURCES:

Mayo Clinic: "Horner syndrome."

National Organization for Rare Disorders: "Horner syndrome."

Genetics Home Reference: "Horner syndrome."

American Academy of Ophthalmology: "Horner syndrome."

Reviewed by Whitney Seltman on August 6, 2019

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What tests are used to diagnose Horner's syndrome?

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