Ophthalmic Lens Clock Base Curve Opticians Lens Curvature Measure Gauge Tool

Description :

Professional to measure dioptric power of a lens and calculate the of curvature .

For use with both glass and .

Quickly identify and curve .

The precision scale is uncrowded and easy to read .

Convenient to use and easy to carry in .

Measuring Range : - 20mm

Material : metal

Size : approx . 6x1 . 2cm / 2 . 4x0 . 48 inch

Package Includes :

1x Lens Clock

Note :

Please allow 1 - 2cm ( . 4 - . 8 inch ) size difference due to measurement . Thank you !