|George Giles in his characteristic bow tie and 1960s spectacles|
As Giles wrote in the preface to his Practice of Orthoptics he was prone to 'living on the job'. At various times he was Senior Examiner of the BOA, Senior Staff refractionist, Senior Orthoptist and Lecturer at the London Refraction Hospital, consultant to a cadet ship - the Incorporated Thames Nautical Training College (HMS "Worcester"), Registrar of the Joint Council of Qualified Opticians, Technical Adviser to the London Optical Company, Honorary Secretary of the West and North West London and Middlesex Local Association, member of the GOC, President of the International Optical League, a Fellow of the American Academy of Optometry, a Fellow of the Illuminating Engineering Society, Fellow of the Royal Microscopical Society and an Ernest Aves Medallist. He also qualified as a barrister of Lincoln's Inn. Giles edited the Dioptric Review and The British Journal of Physiological Optics. He co-designed the Giles-Archer Colour Vision Unit and various orthoptic instruments, many of which are represented in the BOA Museum collection.
Characteristically, his book on the Practice of Orthoptics begins with an historical survey including a discussion and illustration from Bartisch's Ophthalmodouleia, as found in the rare books collection of the BOA Library, and an account of the work of F.C. Donders and Claude Worth. Like Sutcliffe, he benefited greatly from the knowledge and assistance of the BOA Librarian Margaret Mitchell.