1. Vision Science Group, Discipline of Orthoptics, Graduate School of Health, University of Technology Sydney, NSW, Australia
2. Ophthalmology Department, Prince of Wales Hospital, Sydney, NSW, Australia
3. Department of Ophthalmology, University of New South Wales, Sydney, NSW, Australia
4. Marsden Eye Specialists, Sydney, NSW, Australia
5. Hamilton Glaucoma Centre, Shiley Eye Institute, University of California, San Diego, San Diego, CA, USA