Lexic.us

Definition of Diopter

1. Noun. 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.

Definition of Diopter

1. n. An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.

Definition of Diopter

1. a measure of refractive power [n -S] : DIOPTRAL [adj]

Medical Definition of Diopter

1. An optical unit representing the reciprocal of the focal length (in metres) of a lens, in terms of the metre. A 1 diopter lens has a focal length of 1 metre, a 2-diopter lens has a focal length of 1/2 metre, etc. The diopter expresses the power as in spectacles or other weak lenses. (05 Aug 1998)

Lexicographical Neighbors of Diopter

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