1. Centre for Public Health, Queen’s University Belfast, Northern Ireland, UK
2. College of Health Sciences, University KwaZulu Natal, Durban, South Africa
3. Cochrane Eyes and Vision, International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, UK
4. Ophthalmic Research Center, Research Institute for Ophthalmology and Vision Science, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. Who Collaborating Centre for the Eye Care and Prevention of Blindness, Iran
6. Centre for Ophthalmology and Visual Science, Lions Eye Institute, University of Western Australia, Perth, Australia
7. Department of Noncommunicable Diseases, Vision and Blindness Prevention Programme, World Health Organization, Geneva, Switzerland