Definition: A bifocal is a lens that has two focal points, usually one lens for viewing distant objects, and one lens for viewing close objects. A bifocal may contain a visible line across the middle of the lens that separates the two focal portions. Depending on preference, a patient may choose from a variety of shapes for the near vision focal segment, including a half-moon or circular shape. Eye care professionals may prescribe a bifocal for presbyopia or other near-focusing disorders.
Also Known As: Multifocal lens
