Affiliation: | aCornea and External Diseases Division, Asociación Para Evitar la Ceguera, Mexico City, Mexico;bDepartment of Ophthalmology, Asociación Para Evitar la Ceguera, Mexico City, Mexico;cDepartment of Ophthalmology, Miami Veterans Affairs Medical Center, Miami, Fla., USA;dCornea and External Diseases Division, Bascom Palmer Eye Institute, University of Miami, Miami, Fla., USA |