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Refractive ErrorsAmblyopiaMyopiaHyperopiaRefraction, OcularEyeglassesAnisometropiaStrabismusVisual AcuityRetinoscopyVision ScreeningAstigmatismMydriaticsAccommodation, OcularSensory DeprivationVision TestsAxial Length, EyeEmmetropiaEyeBiometryEsotropiaOptometryCyclopentolateVision, LowVisually Impaired PersonsVision DisordersVision, BinocularPresbyopiaEye DiseasesRefractive Surgical ProceduresCorneal TopographySingaporePupilBlindnessAnterior ChamberLensesContact LensesContrast SensitivityPrevalenceCorneaCataractVision, MonocularDepth PerceptionOrthopticsExotropiaAberrometryMyopia, DegenerativeOcclusive DressingsOphthalmologyVision, OcularKeratomileusis, Laser In SituDominance, OcularKeratotomy, RadialPhotorefractive KeratectomyLens, CrystallineLasers, ExcimerInterferometryEast TimorAge DistributionSensory ThresholdsLens Implantation, IntraocularSex DistributionOcular Physiological PhenomenaVitreous BodyBelizeAsian Continental Ancestry GroupDiagnostic ErrorsAlbinism, OcularDiagnostic Techniques, OphthalmologicalTropicamideCross-Sectional StudiesFixation, OcularCataract ExtractionOptics and PhotonicsFovea CentralisTomography, Optical CoherenceChoroidBandagesIndiaContact Lenses, HydrophilicForm PerceptionPhotographyReproducibility of ResultsRefractometryRetinopathy of PrematurityConvergence, OcularDiplopiaPerceptual DisordersUrban PopulationArizonaPseudophakiaVisual FieldsPsychophysicsFollow-Up StudiesPhacoemulsificationRetrospective StudiesProspective StudiesRetinaIntraocular PressureNystagmus, Pathologic