It can be used to measure the radius of cornea's curvature
and dioptor.And it can also be to measure the axis and dioptor of cornea astigmatism.

Product parameters
Measurement Range Curvature Radius:5.5-11mm Dioptor:30-60D
Minimum Division:Radius:0.02mm,Dioptor:0.25D
Minimum Surface Required for Measurement:
R=5.5mm φ1.65mm, R=7.5mm φ2.36mm, R=11mm φ3.36mm
Whole packing Volume:0.264m^3
Carton Number:2
Total Weight:46kg