title: A simplified methodology for the assessment of blindness and its main causes.
mesh_terms: D001766:Blindness / Q000453:epidemiology*; D004812:Epidemiologic Methods; D005128:Eye Diseases / Q000453:epidemiology; D005544:Forecasting; D014943:Global Health; D006306:Health Surveys; D006753:Hospital Records; D006801:Humans; D012042:Registries