Ophthalmic Lens Clock Base Curve Optician Lens Measure Radian Apparatus With Box

Curve Optician Lens Measure Features : Zero calibration Vertical positive degree measurement Vertical measurement opposite degree Two numerical subtraction lens radian number Specification : Measuring Range: 0-20mm Reading: 0.25 Measure Scope: 20 Size: 6 x 5 x 1.3cm Box Size: 7.5 x 8.7 x3.2cm Package includeds : 1 x Measuring Lens Radian Apparatus 1 x Nasal Type Adjustment Material 1 x Paper Ruler Details pictures :