He is a medical microbiologist who has worked for many years in the area of contact lenses and the ocular surface. His laboratory focuses on development of drug delivery contact lenses and novel antimicrobials that have applications as antibiotics and disinfectants. They also develop new antimicrobial coatings that can be used to coat contact lenses and so reduce infections and inflammation during contact lens wear. They have taken several of these through to pre-clinical testing, and antimicrobial contact lenses through to Phase III clinical trials. Their research studies have led to the publication of 15 patents and over 570 peer reviewed papers. He has trained over 30 post-doctoral scientists and 72 post-graduate (PhD) students. He is currently supervising 2 associate professors, 1 senior lecturer, 1 lecturer and 8 post-doctoral scientists. He currently supervise 28 PhD students.