[1] King Saud Univ, Coll Appl Med Sci, Dept Optometry & Vis Sci, Riyadh, Saudi Arabia
[2] Univ New South Wales, Sch Optometry & Vis Sci, Sydney, Australia
[3] Univ Auckland, Fac Med & Hlth Sci, New Zealand Natl Eye Ctr, Dept Ophthalmol, Auckland, New Zealand