Optics. a unit of measure of the refractive power of a lens, having the dimension of the reciprocal of length and a unit equal to the reciprocal of one meter. Abbreviation: D
an instrument, invented by Hipparchus, to measure the apparent diameter of the sun or moon or to estimate the size or elevation of distant objects.
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A split-focus diopter is implemented, one of a few homages to De Palma’s Body Double.
The unit of power employed by spectacle-makers is termed the diopter or dioptric (see Spectacles).
Diopter, the unit in terms of which the power of a lens or curved mirror can be expressed.