Eyeglasses that accommodate two viewing zones, one for seeing objects that are near and one for distance. Bifocal lenses may have a well-defined single visible line separating the two viewing zones, or be blended as in "no line" or progressive add lenses.

Lenses containing upper and lower segments, each with a different power.

Bifocal Lenses are useful in affording the patient 2 vision corrections. One for distance and the other reading.

A type of multifocal lens with lines that provide (correction for both distance and near vision.) two fields of vision: distance and near. There is no correction for viewing at the intermediate distance.

also known as multifocal lenses, contain two or more kinds of correction by providing the wearer with simultaneous distant and near vision. [back to the top

Lenses containing two focal lengths, usually arranged with the focus for distance above and near focus below.