1. Rural Clinical School, University of New South Wales, Port Macquarie, Autralia
2. School of Optometry and Vision Science, University of New South Wales, Sydney, Australia
3. Mark Wainwright Analytical Centre, University of New South Wales, Sydney, Australia
4. Port Macquarie Eye Centre, Port Macquarie, Australia
5. Department of Ophthalmology, Save Sight Institute, Sydney University, Sydney, Australia