Economy Lens Clock

The Economy Lens Clock measures ±20D with ball tips and includes a hard protective case for durability and precision.

Designed for accurate front and back surface measurements of optical lenses
Measures lens power with a range of ±20 diopters (D), ensuring precise readings for opticians and optical technicians
Features ball tips for safe and accurate contact with lens surfaces
Includes a hard protective case, offering secure storage and easy portability
Simple calibration process:
1. Remove cover from pins
2. Press all three pins against a hard, flat surface
3. Adjust the center pin clockwise or counter-clockwise until the dial is exactly on 0, depending on whether it reads on the positive or negative side of 0. (Note: If the dial is in the + side of 0, turn the center pin clockwise until it is exactly on 0. If the dial is in the – side of 0, turn the center pin counter-clockwise until it is exactly on 0.)