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 m−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.

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.

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 refracts light to …

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 diopters is …

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 to properly …

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 clearly.

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 indicate how strongly …

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.