Domingo Liotta University College of Medicine, Houston, Texas. 1962-64: Advanced Research Fellow of the American Heart Association. 1963-69: Co-Director of the Baylor-Rice Artificial Heart Program shared with Michael E. DeBakey and C. William Hall. Houston, Texas. 1964-71: Assistant Professor of Surgery, Baylor University College of Medicine, Chairman of the Department: Dr. Michael E. DeBakey, Houston, Texas. 1970-71: Director of Surgical Research, Texas Heart Institute, Chief of Cardiovascular Service Denton A. Cooley, Houston, Texas. 1971-74: Surgeon-in-Chief, Carlos Durand Public Hospital, Buenos Aires, Argentina. 1971-90: Surgeon-in-Chief, Service of Cardiovascular Surgery, Italian Hospital of Buenos Aires, Argentina. 1973-74: Secretary of State for Public Health, Argentina.
Rayner (company) London, Ridley performed the first IOL operation on the eye of a 45-year-old female patient. The operation was conducted in secret, done in two stages with the artificial lens permanently implanted three months later. In 1952 the first IOL implant was performed in the United States: a Ridley-Rayner lens was implanted at the Wills Eye Hospital in Philadelphia. Surgeons Turgut Hamdi MD and Warren Reese MD implanted a series of these lenses – some with good visual function results (reported in a review by Dr Charles Letocha in the "Journal of Cataract and Refractive Surgery" in 1999). A lens designed