An instrument to measure the power and cylindrical axis of a spectacle lens. ... Synonym: focimeter, vertometer. ... Origin: Lens + G. Metron, measure ... (05 Mar 2000) ... 
Type: Term Pronunciation: lenz-om′ĕ-tĕr Definitions: 1. An instrument to measure the power and cylindric axis of a spectacle lens. Synonyms: focimeter, vertometer
lensometer An instrument for determining the optical centers and refractive power of spheres and lenses, to locate the axes of cylindrical lenses, and to measure the power and to locate the direction of prisms.phacometer, lensometer A device for measuring the optical characteristics of the lenses of the eyes.