Dr. Tzelikis completed his residency at São Geraldo Eye Hospital, Federal University of Minas Gerais (UFMG), Brazil, followed by a fellowship in cataract and refractive surgery at the same institution. From November 2003 to October 2004, he worked toward a subsequent fellowship in cornea, external disease, and refractive surgery at Wills Eye Hospital in Philadelphia. Dr. Tzelikis is currently a member of the cataract and refractive service at Hospital Oftalmológico de Brasília (HOB) and the cataract and refractive surgery service at São Geraldo Eye Hospital.