Onchocerciasis, OcularOnchocerca volvulusRiversBlindnessIvermectinOnchocercaOnchocerciasisKeratitisFilarioideaNight BlindnessFilaricidesWolbachiaSimuliidaeBrugia malayiAntiparasitic AgentsBlindness, CorticalAnthelminticsCorneaRoss River virusVision, LowCataractVisually Impaired PersonsFresh WaterXerophthalmiaTrachomaEye Diseases, HereditaryVisual AcuityEye DiseasesWater MovementsWater Pollutants, ChemicalVision DisordersGlaucomaCataract ExtractionRefractive ErrorsWater PollutionVitamin A DeficiencyEye InjuriesElectroretinographyMacular Degeneration