ENT Diagnostic Set WG-III 53x32x27cm,20pcs/ctn, 16/14kg Purpose: ENT diagnostic set is ... .FEATURES:Ophthalmoscope's lenses are polished with refined high quality optical glasses.Optical prism projects clear image on eye bottom due to ... ,±4,±5,±6,±8,±10,±12,±15,±20,-25,-30WG-III,Diopter compensation: ±1,±2,±3,±4,±6,±8,±10,±15 ... :1.5V x 2 "C"Type ENT Diagnostic Set WG-III