auto refractometer 1.high quality CE/ISO 2.classic style, competetive price 3.fast delivery time auto refractormeter #FA6000A specifications: Measuring RangeSpherical -20~+20D(VD=12)0.125DstepsCylinder -8~+8D 0.12D/0.25D stepsAxis 0~180°,1°stepsPupil Distance45~85mm,1mm stepsVertex Distance0mm,12mm,13.75mmMin.Pupil SizeØ2.2mmChartAuto fogDisplay5CRT MonitorPrintThermal PrinterPower Supply100~240V ...