Born in Bristol he was educated at Clifton College and Bristol medical school where he gained a scholarship. In 1913 he worked under Richardson Cross and Cyril Walker at the Bristol Eye Hospital, becoming an honorary surgeon in 1919. In 1921 he was appointed surgeon to the eye department of the Bristol General Hospital, and was a lecturer on ophthalmology in Bristol University from 1930 to 1948, when he retired from his public appointments. During the war of 1914-18 he was a temporary surgeon in the Royal Navy, serving as an ophthalmic surgeon in the Grand Fleet and being awarded an OBE for his research on gunlayers' eyesight. He was consultant ophthalmic surgeon to Stoke Park and Brentry Colonies and to the Ministry of Pensions. He was President of the South-Western Ophthalmological Society, and of the Bristol Medico-Chirurgical Society. His recreations included fishing and photography, and in his later years he took a great interest in gardening and philately. He married in 1918 Amy Constance Wadmore, a Royal Navy nursing sister, who died in 1930 leaving two daughters and a son all in the medical profession. His second marriage took place in 1938 to Anna Hermine Silberstein, by whom he had one daughter. Iles died on 19 March 1962 at 87 Pembroke Road, Bristol aged 81.