Tom Lietman is an ophthalmologist at the University of California, San Francisco (UCSF). He is the Ruth Lee and Phillips Thygeson Distinguished Professor in the Departments of Ophthalmology and Epidemiology & Biostatistics. He is the Director of the Francis I. Proctor Foundation, an organized research unit at UCSF that was originally founded to eradicate trachoma.

Tom trained at Yale, Columbia, and Johns Hopkins before a cornea fellowship at Proctor/UCSF. He has collaborated with international colleagues on trachoma clinical trials in Egypt, Nepal, Ethiopia, and Niger. His research interests also include clinical trials for corneal ulcer treatment in Nepal and India, azithromycin for childhood mortality in Burkina Faso and Niger, and mathematical models of infectious disease transmission.