AnisometropiaRefraction, OcularRefractive ErrorsRetinoscopyMyopiaAstigmatismHyperopiaAmblyopiaEyeglassesStrabismusVisual AcuityCorneal TopographyMydriaticsEsotropiaEmmetropiaAccommodation, OcularAxial Length, EyeAniseikoniaKeratomileusis, Laser In SituRefractive Surgical ProceduresLasers, ExcimerPhotorefractive KeratectomyBiometryMyopia, DegenerativeEyeCorneaCyclopentolateVision, BinocularVision TestsSingaporeExotropiaDominance, OcularKeratectomy, Subepithelial, Laser-AssistedVision ScreeningAnterior ChamberSensory DeprivationInterferometryCorneal Wavefront AberrationPupilPrevalenceDepth PerceptionKeratotomy, RadialCorneal PachymetryKeratoconusOptometryOcclusive DressingsArizonaPresbyopiaAge DistributionDiagnostic Techniques, OphthalmologicalLenses, IntraocularOcular Physiological PhenomenaLens Implantation, IntraocularTomography, Optical CoherenceSurgical FlapsFollow-Up StudiesCorneal TransplantationSex DistributionCorneal DiseasesAsian Continental Ancestry GroupBody Weights and MeasuresRetrospective StudiesCorneal StromaProspective StudiesKeratoplasty, PenetratingPhacoemulsificationContact Lenses