MyopiaMyopia, DegenerativeRefraction, OcularEyeglassesHyperopiaChild WelfareRefractive ErrorsDisabled ChildrenChild BehaviorSensory DeprivationEyeAccommodation, OcularAxial Length, EyeScleraTupaiidaeRetinoscopyEmmetropiaBiometryAstigmatismChild Health ServicesTupaiaChild RearingChild of Impaired ParentsLasers, ExcimerVisual AcuityChild, InstitutionalizedPhotorefractive KeratectomyChild Behavior DisordersChild PsychologyKeratomileusis, Laser In SituContact LensesDental Care for ChildrenChild, OrphanedParentsLensesPrevalenceKeratotomy, RadialChild Nutrition DisordersChild LanguageCorneal TopographyCorneaChild Nutritional Physiological PhenomenaOrthokeratologic ProceduresSingaporeCross-Sectional StudiesChild MortalityVitreous BodyRisk FactorsAge FactorsAsian Continental Ancestry GroupFollow-Up StudiesAnterior ChamberQuestionnairesMydriaticsMothersAnisometropiaProspective StudiesKeratectomy, Subepithelial, Laser-AssistedRefractive Surgical ProceduresParent-Child RelationsRetrospective StudiesCase-Control StudiesTreatment OutcomeLongitudinal StudiesBody Weights and MeasuresInfant, NewbornReadingTime Factors