[1] Univ New S Wales, Brien Holden Vis Inst, Sydney, NSW 2052, Australia
[2] Univ New S Wales, Sch Optometry & Vis Sci, Sydney, NSW 2052, Australia
[3] Prince Wales Hosp, Dept Ophthalmol, Sydney, NSW, Australia
[4] S Western Sydney Area Pathol Serv, Sydney, NSW, Australia
[5] Vis Cooperat Res Ctr, Sydney, NSW, Australia