Dioptre (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 patient's prescription indicated a dioptre reading of minus 3.50, which meant they were slightly nearsighted.
- The oculist measured the refractive power of the lens, expressing it in dioptres to create a precise prescription.
- A dioptre of one metre indicates that the focal length of the lens is one metre also.
- Using a phoropter, the eye doctor determines the dioptre reading of the patient's corrective lenses.
- The thin lenses were made to correct her myopia and were prescribed in dioptres, allowing for finer adjustments.