DIOPTER Meaning and
Definition
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A diopter is a unit of measurement used to quantify the refractive power of a lens. Specifically, it measures the ability of a lens to converge or diverge light rays. One diopter is equal to the reciprocal of the focal length of the lens in meters.
In ophthalmology, diopters are commonly used to assess and correct various vision problems, such as nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. A negative diopter value indicates a concave lens, which is used to correct myopia by diverging incoming light rays and bringing them to a focus on the retina. On the other hand, a positive diopter value represents a convex lens that helps correct hyperopia by converging light rays and focusing them correctly on the retina.
Diopters are also utilized when prescribing reading glasses or magnifying lenses to enhance near vision. Additionally, they are integral in determining the power of contact lenses based on an individual's specific eye prescription.
The concept of diopters extends beyond vision correction and is relevant in other fields such as photography and optics. It is crucial for accurately measuring and discussing the power of lenses, telescopes, microscopes, and other optical devices. By providing a standardized unit of measurement, diopters enable precise communication and calculation of optical properties.
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A dioptric, the unit of refracting power of lenses, noting a lens whose principal focus is at a distance of 1 meter (39.3 inches).
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for DIOPTER
Etymology of DIOPTER
The word "diopter" has its roots in Greek. It comes from the Greek word "dioptrḗs", which means "transparent" or "to see through". This term was used in ancient Greece to refer to an optical instrument called a "dioptra", which was used for surveying and measuring angles. Over time, the term "diopter" came to be associated with the unit of measurement used to quantify the refractive power of lenses.
Similar spelling words for DIOPTER
- dipper,
- diptera,
- diphtheria,
- divider,
- diaper,
- dipped,
- dipterous,
- tiptoe,
- dote,
- depot,
- Dieter,
- dipteran,
- dirtier,
- dipteryx,
- dipteronia,
- dividers,
- dispute,
- dipteron,
- dope,
- deter,
- Di Pietro.
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