About the Authors

Farzana Sehrin

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Supervision, Validation, Writing – original draft, Writing – review & editing

Affiliation BRAC (Formerly: Bangladesh Rural Advancement Committee), Dhaka, Bangladesh

Ling Jin

Roles Formal analysis, Software, Validation, Writing – original draft, Writing – review & editing

Affiliation State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China

Kamrun Naher

Roles Data curation, Formal analysis, Methodology, Writing – original draft

Affiliation BRAC (Formerly: Bangladesh Rural Advancement Committee), Dhaka, Bangladesh

Narayan Chandra Das

Roles Data curation, Formal analysis, Investigation, Methodology, Supervision, Writing – original draft

Affiliation BRAC (Formerly: Bangladesh Rural Advancement Committee), Dhaka, Bangladesh

Ving Fan Chan

Roles Supervision, Validation, Visualization, Writing – review & editing

Affiliations University of KwaZulu Natal, Durban, South Africa, Centre for Public Health, Queen’s University Belfast, Belfast, Northern Ireland, United Kingdom

Dong Feng Li

Roles Formal analysis, Methodology, Writing – original draft, Writing – review & editing

Affiliation Centre for Public Health, Queen’s University Belfast, Belfast, Northern Ireland, United Kingdom

Susan Bergson

Roles Methodology, Project administration, Resources, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation VisionSpring, New York, New York, United States of America

Ella Gudwin

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Resources, Supervision, Writing – original draft, Writing – review & editing

egudwin@visionspring.org

Affiliation VisionSpring, New York, New York, United States of America

Mike Clarke

Roles Supervision, Validation

Affiliation Centre for Public Health, Queen’s University Belfast, Belfast, Northern Ireland, United Kingdom

Tai Stephan

Roles Formal analysis, Writing – review & editing

Affiliation Orbis International, New York, New York, United States of America

Nathan Congdon

Roles Formal analysis, Investigation, Methodology, Supervision, Validation, Writing – review & editing

Affiliations State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China, Centre for Public Health, Queen’s University Belfast, Belfast, Northern Ireland, United Kingdom, Orbis International, New York, New York, United States of America

Competing Interests

Sehrin, Jin, Naher, Chandra Das, Chan and Clarke declare no competing interests. Gudwin and Bergson report personal fees from VisionSpring, a social enterprise engaged in the distribution and sale of eyewear, outside the submitted work. Congdon is Director of Research for Orbis International, a non-governmental organization carrying out eye health programs in low and middle-income countries, outside the submitted work. Congdon also received salary support from Ulverscroft Foundation, a UK-registered charity, at the time of this work. Stephan is a Global Programs Manager for Orbis International outside the submitted work. None of these interests alters our adherence to PLOS ONE policies on sharing data and materials.