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Refractive ErrorsMyopiaHyperopiaRefraction, OcularEyeglassesRetinoscopyAstigmatismAccommodation, OcularVision ScreeningVisual AcuityAxial Length, EyeEmmetropiaAnisometropiaBiometryEyeMydriaticsStrabismusVision TestsAmblyopiaCyclopentolateVisually Impaired PersonsVision, LowOptometryPresbyopiaRefractive Surgical ProceduresVision DisordersEye DiseasesCorneal TopographySensory DeprivationPupilSingaporeEsotropiaAnterior ChamberLensesBlindnessContact LensesCorneaPrevalenceAberrometryCataractMyopia, DegenerativeKeratomileusis, Laser In SituKeratotomy, RadialLens, CrystallineInterferometryPhotorefractive KeratectomyEast TimorLasers, ExcimerLens Implantation, IntraocularAge DistributionExotropiaVitreous BodyBelizeAsian Continental Ancestry GroupSex DistributionDiagnostic ErrorsAlbinism, OcularDiagnostic Techniques, OphthalmologicalTropicamideVision, OcularOptics and PhotonicsCross-Sectional StudiesChoroidIndiaContact Lenses, HydrophilicTomography, Optical CoherencePhotographyRefractometryOphthalmologyRetinopathy of PrematurityConvergence, OcularDiplopiaVision, MonocularOcular Physiological PhenomenaCataract ExtractionUrban PopulationArizonaVision, BinocularPseudophakiaFovea CentralisReproducibility of ResultsPhacoemulsificationIntraocular PressureNystagmus, CongenitalScleral DiseasesGlaucomaOptic DiskLenses, IntraocularDepth PerceptionLos AngelesWeights and MeasuresAphakia, PostcataractRetinaRural PopulationAlbinism, OculocutaneousScleraQuantitative Trait, HeritableKeratoconusTwin Studies as Topic