Special Features:

Functions: measurements of a single lens or a pair of glasses, cylinder power measurement, cylinder axis measurement, and prism power measurement; measure scale: -15.00d to +15.00d divided numerical value 0.125d during 0.00d to +/- 10.00d and 0.25 during +/- 10.00d to +/- 15.00d; cylinder axle measuring scale: 0-180 degrees; prismatic degree measuring scale: 4 (prismatic degrees); divided numberal value: 1 (prismatic degrees); max. Diameter or measured lens: 80mm; focusing scale of eyepiece: +/- 5.00d; battery operated; portable

Properties:

A device for determining the optical properties of a lens, such as dioptric power, axis, and angle between cylinders. It may have a device for marking the lens. Does not include measure, lens, ophthalmic.