About the Authors

Hannah Kuper

To whom correspondence should be addressed. E-mail: hannah.kuper@lshtm.ac.uk

Affiliation International Centre for Eye Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Sarah Polack

Affiliation International Centre for Eye Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Cristina Eusebio

Affiliation Cataract Foundation of the Philippines, Bacolod, Philippines

Wanjiku Mathenge

Affiliations International Centre for Eye Health, London School of Hygiene & Tropical Medicine, London, United Kingdom , Rift Valley Provincial Hospital, Nakuru, Kenya

Zakia Wadud

Affiliation Child Sight Foundation, Dhaka, Bangladesh

Allen Foster

Affiliation International Centre for Eye Health, London School of Hygiene & Tropical Medicine, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

HK, SP, and AF were responsible for the conception and design of the study. HK and SP carried out the training for the study, and CE, WM, and ZW were responsible for coordinating the acquisition of data. SP was responsible for data management. HK was responsible for analysis, interpretation of data, and drafting the article. The other authors revised it critically for important intellectual content. All authors gave final approval of the version to be published.