National RAAB; Sample size: 3731; Reference: Gallarreta M, Furtado JM, Lansingh VC, Silva JC, Limburg H. Rapid assessment of avoidable blindness in Uruguay: results of a nationwide survey. Rev Panam Salud Publica. 2014;36(4):219–24 and Silva, J. National surveys of avoidable blindness and visual impairment in Argentina, El Salvador, Honduras, Panama, Peru, and Uruguay. Rev Panam Salud Publica 2014;36(4):214–8.