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.

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.

Aug 29, 2025 · A diopter is a unit of measurement for the optical power of a lens or curved mirror. It describes how effectively a lens converges or diverges light rays, indicating its ability to bend …

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 …

A diopter is a critical unit of measurement in optics that quantifies the refractive power of lenses used in eyeglasses and contact lenses. It indicates the degree to which a lens must bend light …

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 …

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 …

Diopter strength refers to the optical power of a lens. It's commonly applied to reader-strength eyeglasses or bifocals, as well as telescopes & other magnifying lenses.

Dec 6, 2016 · 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.