A dioptre (British spelling) or diopter (American spelling), symbol dpt or D, is a unit of measurement with dimension of reciprocal length, equivalent to one reciprocal metre, 1 dpt = 1 …

Oct 30, 2022 · A diopter is a unit that is used to calculate the focusing strength of a pair of glasses or contact lenses. It is the unit used for an optical prescription.

Dec 8, 2025 · The diopter is the standard unit of measurement used to quantify the optical power of a lens or curved mirror, which measures its ability to bend or refract light rays.

Apr 4, 2024 · The basic unit of measurement in optometry, diopters, is used to express the optical power of prescription lenses. They are made expressly to gauge the way a lens bends or …

Sep 10, 2024 · A diopter is a unit of measurement for a lens’s focusing power. Learn more about what a diopter measures and how diopters vary by prescription.

diopter, in optics, unit of magnifying power of a lens or lens system. Because the power of a lens is proportional to unity (one) divided by the focal length (see lens), the power of a lens in …

Feb 10, 2025 · A diopter is a unit that measures the refractive power of a lens or an optical system, describing how effectively it bends light to focus an image on the retina.

Oct 25, 2024 · Diopters (abbreviated as dpt) are the unit of measurement used to describe the refractive power of optical lenses. In the context of the eye and defective vision, diopters …

Sep 23, 2024 · A diopter is a unit that measures the optical power of a lens, which focuses light to improve vision. Think of it as a way to quantify how much correction your eyes require to see …

The meaning of DIOPTER is a unit of measurement of the refractive power of lenses equal to the reciprocal of the focal length in meters.