1. Department of Optometry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
2. College of Optometry and Visual Science, University of Houston, Houston, Texas, USA
3. Centre for Eye Research Ireland, School of Physics, Clinical and Optometric Sciences, College of Sciences and Health, Technological University Dublin, Dublin, Ireland
4. School of Optometry and Vision Science, University of Waterloo, Waterloo, Canada
5. School of Optometry, University of Alabama at Birmingham, Birmingham, Alabama, USA
6. Eye Department, CCBRT Disability Hospital, Dar Es Salaam, Tanzania