Definition of Dioptre. Meaning of Dioptre. Synonyms of Dioptre

Here you will find one or more explanations in English for the word Dioptre. Also in the bottom left of the page several parts of wikipedia pages related to the word Dioptre and, of course, Dioptre synonyms and on the right images related to the word Dioptre.

Definition of Dioptre

Dioptre
Dioptre Di*op"tre, n. [F. See 2d Dioptric.] (Optics) A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.

Meaning of Dioptre from wikipedia

- A dioptre (British spelling) or diopter (American spelling) is a unit of measurement of the optical power of a lens or curved mirror, which is equal to...
- The Four Prism Dioptre Reflex Test (also known as the 4 PRT, or 4 Prism Dioptre Base-out Test), is an objective, non-dissociative test used to prove the...
- for a constant head tilt or turn. Prism correction is measured in prism dioptres. A prescription that specifies prism correction will also specify the "base"...
- the form of the elastic lens using the ciliary body (in humans up to 15 dioptres in the mean). Fish and amphibians vary the power by changing the distance...
- optical power is the inverse metre (m−1), which is commonly called the dioptre. Converging lenses have positive optical power, while diverging lenses...
- this condition is MP0 = (0.25 m)Φ + 1, where Φ is the optical power in dioptres, and the factor of 0.25 m represents the ****umed near point (¼ m from the...
- reciprocal centimetre or inverse centimetre (symbol: cm−1), and, in optics, the dioptre. Quantities measured in reciprocal length include: absorption coefficient...
- fixation, visual acuity and cooperation For accurate (within two prism dioptres) numerical recording that will provide a point of reference for ****ure...
- A dioptra (sometimes also named dioptre or diopter, from Gr****: διόπτρα) is a classical astronomical and surveying instrument, dating from the 3rd century...
- power. In humans, the refractive power of the cornea is approximately 43 dioptres. The cornea can be reshaped by surgical procedures such as LASIK. While...