PresbyopiaRefractive ErrorsEyeglassesAccommodation, OcularRefraction, OcularMyopiaHyperopiaRetinoscopyVisual AcuityEast TimorLens, CrystallineRefractive Surgical ProceduresAstigmatismVision TestsSurgical EquipmentVision ScreeningCiliary BodyAxial Length, EyeEmmetropiaAnisometropiaBiometryEyeMydriaticsMicroscopy, AcousticStrabismusAmblyopiaAgingCyclopentolateVisually Impaired PersonsVision, LowOptometryPrevalence