☀️ Features:
This is an accurate lens clock to calculate base curves.
Used to measure base curve of ophthalmic lens.
Differentiate an Aspheric lens from Spherical one.
The scale will give you the focal length。
Works very accurate and easy to calculate when doing the lenses

☀️ Specifications
Measuring Range: 0-20mm
Reading: 0.25
Measure Scope: +/-20
Size: 80 x 100 x 28mm
Weight: 142.5g

☀️ Package Include:
1×Lens Clock Base Curve Measurement

❤️✉If you have any question about the products, please feel free to contact us,we will deal with the issue immediately and carefully until you are satisfied.