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An instrument to measure the power and cylindric axis of a spectacle lens.
Synonym(s): focimeter, vertometer
[lens + G. metron, measure]


(len-zom′ĕt-ĕr) [ lens + -meter]
A device that measures the refractive power of a lens.


An optical instrument for determining the vertex power, axis direction and optical centre of an ophthalmic lens (Fig. F8). The instrument can be either manual or automated. Syn. Lensometer (a tradename); vertexometer; Vertometer (a tradename). See lens measure; neutralization; back vertex power.
Fig. F8 Focimeter (Shin Nippon)enlarge picture
Fig. F8 Focimeter (Shin Nippon)
References in periodicals archive ?
In addition, refraction data acquisition from an auto refractometer, auto ref-keratometer, lensmeter and phoroptor via a serial RS-232C is possible.
Tenders are invited for Supply of computerized lensmeter machine as per Technical specification enclosed as annexure.
It is always useful to repeat the refraction and measure the current spectacle correction with a lensmeter to assess whether there is a difference.
The VISX laser has used a lensmeter to infer the amount of correction and the Summit laser has used nothing but a power meter," according to Craig Beyer, D.
RODENSTOCK INSTRUMENT'S new AL5000 automatic lensmeter is the latest generation of lensmeters with touch sensitive control and a high definition screen.
s ophthalmic lens processing subsidiary, Gerber Coburn, introduced several new products at the Optical Laboratory Association (OLA) Exhibition and Conference, Indianapolis, IN, November 21-23, 2002: the Eclipse Surface Blocker(TM), Hercules high-volume, backside coater, Dimetrix finish blocker and lens verification device, Metrix-Lab lensmeter, DFS II surfacing pad system, enhanced SL2 generator, and GeminiZ(TM) for the CR39 process.