diopter

play
noun di·op·ter \dī-ˈäp-tər, ˈdī-ˌäp-\

Definition of diopter

  1. :  a unit of measurement of the refractive power of lenses equal to the reciprocal of the focal length in meters

Recent Examples of diopter from the Web

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Origin and Etymology of diopter

diopter (an optical instrument), from Middle French dioptre, from Latin dioptra, from Greek, from dia- + opsesthai to be going to see — more at optic


Medical Dictionary

diopter

noun di·op·ter
variants: or chiefly British

dioptre

\dī-ˈäp-tər, ˈdī-ˌäp-\play

Medical Definition of diopter

  1. :  a unit of measurement of the refractive power of a lens equal to the reciprocal of the focal length in meters


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