1 International Centre for Eye Health, London School of Hygiene & Tropical Medicine, London, UK.
2 School of Optometry and Vision Science, University of Auckland, Auckland, New Zealand.
3 The Fred Hollows Foundation, Melbourne, Australia.
4 International Agency for the Prevention of Blindness, London, UK.
5 Disability Health Research Center, Johns Hopkins University, Baltimore, Maryland, USA.
6 The Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
7 Department of Ophthalmology, University of Calabar, Calabar, Nigeria.
8 Africa Vision Research Institute, Durban, South Africa.
9 National Institute for Health Research Biomedical Research Centre for Ophthalmology at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology, London, UK.