Diopter (Noun)
Meaning
A unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists.
Classification
Nouns denoting quantities and units of measure.
Examples
- The prescription for her glasses specified a correction of 2 diopters in the left lens and 1.5 diopters in the right lens.
- To correct his nearsightedness, the optometrist prescribed glasses with lenses of -3 diopters.
- A standard magnifying glass has a refractive power of about 2 diopters.
- Her myopia was severe, requiring lenses of -6 diopters to correct her vision.
- The contact lenses had a power of 1 diopter, which was sufficient to correct his mild astigmatism.