[1] International Centre for Eye Health,LondonSchool of Hygiene and Tropical Medicine,Keppel Street,London WC1E7HT,UK.
[2] Sightsavers International,UK.Medical Advisor
[3] Emeritus Professorof Preventive Ophthalmology,Institute of Ophthalmology,University College London,UK.
[4] 安徽省立医院眼科