dioptry (Meaning)
Webster
dioptry (n.)
A dioptre.
Synonyms & Antonyms of dioptry
No Synonyms and anytonyms found
dioptry Sentence Examples
- The dioptry (D) is a unit of measure for the refractive power of a lens.
- The power of a lens is measured in diopters, which are the reciprocal of the focal length in meters.
- A positive diopter indicates a converging lens, while a negative diopter indicates a diverging lens.
- The higher the diopter value, the stronger the lens.
- Diopters are used to measure the refractive power of eyeglasses, contact lenses, and intraocular lenses.
- People with nearsightedness (myopia) need glasses or contact lenses with negative diopters to correct their vision.
- People with farsightedness (hyperopia) need glasses or contact lenses with positive diopters to correct their vision.
- Astigmatism is a condition in which the cornea is not perfectly round, resulting in a need for glasses or contact lenses with cylindrical diopters.
- Presbyopia is a condition in which the lens of the eye gradually loses its ability to focus, resulting in a need for reading glasses or bifocals with positive diopters.
- Dioptry is also used in ophthalmology to measure the power of intraocular lenses implanted during cataract surgery.
FAQs About the word dioptry
A dioptre.
No synonyms found.
No antonyms found.
The dioptry (D) is a unit of measure for the refractive power of a lens.
The power of a lens is measured in diopters, which are the reciprocal of the focal length in meters.
A positive diopter indicates a converging lens, while a negative diopter indicates a diverging lens.
The higher the diopter value, the stronger the lens.
