IOI and Combat Blindness International established a clinical and research ophthalmology resident trainee rotation partnership with the Department of Ophthalmology University of São Paulo (DO USP) in São Paulo, Brazil. This program invites a Brazilian ophthalmology resident to perform an unpaid externship at DOVS for a 5-week rotation. They observe clinical practice in various DOVS ophthalmology clinics and operating rooms, participate in all didactic teaching opportunities already available to the DOVS resident and fellow trainees, and complete a research project with guidance by an assigned DOVS faculty mentor.