A Lensometer is an optical instrument used by optometrists and opticians to measure the prescription of eyeglasses,

contact lenses, and other optical devices. It is also known as a lensmeter or a focimeter. The Lensometer measures

the parameters of a lens, including power, curvature, and axis, by analyzing the light that is refracted through it.

These measurements are essential in ensuring that glasses and contacts provide the correct amount of correction for

an individual's particular visual needs.