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Samuel C. Yiu, MD, PhD, is an associate professor of ophthalmology at the Wilmer Eye Institute. He specializes in cornea and external eye diseases, cataracts and refractive surgery. In addition, he is a nationally and internationally recognized specialist in ocular surface diseases and ocular surface reconstruction surgery. He has been named the one of the Best Doctors in America in the past and most recently in 2013.

Dr. Yiu received his MSc (applied biometry) and PhD (physiology and biophysics) from the University of Southern California. He then completed a post-doctoral fellowship in lacrimal physiology at the Schepens Eye Institute at Harvard Medical School and went on to earn his M.D. from the University of Alberta in Canada. Dr. Yiu completed an internship and his ophthalmology residency at Dalhousie University in Halifax, Nova Scotia and a fellowship in cornea, external disease and refractive surgery at the University of Southern California's Doheny Eye Institute. After serving as the director of Doheny's Ocular Surface Center and co-director of Doheny's cornea division, Dr. Yiu joined the Wilmer faculty in 2011 and spent two years as the chief of the cornea division at King Khaled Eye Specialist Hospital (KKESH), Wilmer's affiliate hospital in Riyadh, Saudi Arabia.