Base curve radius
Base Curve Radius (pronunciation: /beɪs kɜːv ˈreɪdiəs/) is a term used in optometry and ophthalmology to describe the curvature of the back surface of a contact lens. It is typically measured in millimeters and is one of the key parameters in lens fitting.
Etymology
The term "base curve radius" is derived from the English words "base" and "curve", and the Latin word "radius". "Base" refers to the foundational aspect of the curve, "curve" refers to the rounded shape, and "radius" refers to the distance from the center of a circle to its circumference.
Related Terms
- Diopter: A unit of measurement used in optometry to determine the optical power of a lens.
- Keratometry: The process of measuring the curvature of the cornea, often used in conjunction with determining the base curve radius.
- Cornea: The clear front surface of the eye, which along with the lens, refracts light to help the eye focus.
- Lens (optics): A piece of glass or other transparent substance with curved sides for concentrating or disseminating light rays.
See Also
References
External links
- Medical encyclopedia article on Base curve radius
- Wikipedia's article - Base curve radius
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