1. Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, California
2. Aravind Eye Care System, Madurai, India
3. Aravind Eye Care System, Pondicherry, India
4. Aravind Eye Care System, Coimbatore, India
5. Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, California 5Department of Ophthalmology, University of California, San Francisco, San Francisco, California
6. Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, California 6Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California
7. Francis I. Proctor Foundation, University of California, San Francisco, San Francisco, California 5Department of Ophthalmology, University of California, San Francisco, San Francisco, California 6Department of Epidemiology and Biostatistics, University of