[1] London School of Hygiene & Tropical Medicine,International Centre for Eye Health, Clinical Research Department
[2] Rwanda International Institute of Ophthalmology and Dr Agarwal’s Eye Hospital,Department of Non
[3] London School of Hygiene & Tropical Medicine,Communicable Disease Epidemiology
[4] University of Oxford,Nuffield Department of Primary Care
[5] Kitale Eye Unit and Trans Nzoia County,undefined
[6] MRC Tropical Epidemiology Group,undefined
[7] Department of Infectious Disease Epidemiology,undefined
[8] London School of Hygiene & Tropical Medicine,undefined
[9] NIHR BMRC at Moorfields Eye Hospital NHS Foundation Trust and UCL Institute of Ophthalmology,undefined
[10] Centre for Public Health,undefined
[11] Queen’s University Belfast,undefined
[12] Moorfields Eye Hospital NHS Foundation Trust,undefined