NORD: Horner's Syndrome
- Offer the synonyms, a general discussion and further resources.
- http://www.rarediseases.org/search/rdbdetail_abstract.html?disname=Horner%27s%20Syndrome

Handbook of Ocular Disease Management - Horner's Syndrome
- An article about the signs, symptoms, pathophysiology, management and clinical pearls.
- http://www.revoptom.com/handbook/sect6g.htm

Family Practice Notebook: Horner's Syndrome
- The pathophysiology, causes and signs of horners syndrome.
- http://www.fpnotebook.com/NEU1.htm