AstigmatismMyopiaRefraction, OcularRefractive ErrorsCorneal TopographyHyperopiaMyopia, DegenerativeRetinoscopyVisual AcuityEyeglassesKeratoplasty, PenetratingAnisometropiaCorneaSuture TechniquesLasers, ExcimerKeratomileusis, Laser In SituCataract ExtractionCorneal DiseasesKeratoconusLens Implantation, IntraocularLenses, IntraocularKeratectomy, Subepithelial, Laser-AssistedCorneal Wavefront AberrationPhotorefractive KeratectomyAccommodation, OcularBiometryAberrometryKeratotomy, RadialEyeRefractive Surgical ProceduresVision ScreeningScleraSensory DeprivationPseudophakiaSuturesCorneal Surgery, LaserGlareLensesEmmetropiaContact LensesMydriaticsPhacoemulsificationEyelidsVision TestsCorneal TransplantationAmblyopiaAxial Length, EyeRetinopathy of PrematurityTupaiidaePhakic Intraocular LensesOphthalmologyNylonsAlbinism, OcularPterygiumCorneal PachymetrySingaporeOptometryAnterior ChamberCyclopentolateTupaiaPrevalenceStrabismusPostoperative ComplicationsFollow-Up StudiesCataract