Daniel Roberts Lloyd Hart was a consultant ophthalmologist in Brisbane, Queensland and the second president of the Australian College of Ophthalmologists. He was born in Brisbane on 14 October 1920, the sixth child of Percy Lloyd Hart, a barrister, and Margaret Beatrice Hart née Crombie, the daughter of a grazier. He attended Ascot State School in Brisbane to the age of 13 and then the Church of England Grammar School, also in Brisbane. At the age of 17 Hart began studying medicine at the University of Queensland, graduating from the shortened war course in 1943. He was a resident medical officer at Brisbane General Hospital and then, in 1944, joined the Second Australian Imperial Force, serving as a medical officer for the 65th Australian Infantry Battalion in the Pacific and then in occupied Japan. He was demobilised in 1947 with the rank of captain. He briefly returned to Brisbane, and then went to the UK, where he held a post at the Bristol Eye Hospital. He gained his diploma in ophthalmology in 1951 and became a fellow of the Royal College of Surgeons of England in 1952. In December 1952 he sailed home to Australia and took up appointments at the Royal Brisbane and Brisbane Children’s and Princess Alexandra hospitals. He also set up in private practice with his brother, James. He became a fellow of the Royal Australasian College of Surgeons in 1961. From 1960 to 1965 he was a member of the board of the Ophthalmic Research Institute of Australia and set up research into eye melanoma in 1966. In 1969 he became president of the Australian College of Ophthalmologists, serving until October 1970. After his retirement in 1997, he wrote *Fido & friends: a family story and the World War II of Queenslanders* (Brisbane, 2005), documenting his family history from the 1700s, his childhood in Brisbane, his service during the Second World War and his career in ophthalmology. He married Margaret Holcombe Smith, a Sydney physiotherapist, in 1950. They had three sons, David, Peter and Simon, and a daughter, Tempe. Predeceased by his wife in 2005, Hart died on 26 December 2019 at the age of 99.