Bifocal Glasses Lenses

Bifocal Lenses:

Bifocal lenses simply divide the visual plane into two parts. Typically there is a visual range for reading and another for intermediate or longer distance depending on the person’s natural scale of vision. Typically glasses defined as bifocals use the upper portion of the lens for distance and the lower portion below the eye level for reading. Some styles include a horizontal break between magnifications while others use a circular shape embedded in the lens that is less noticeable.

Bifocals are fine for people with distinct visual needs but may be limited for those who have trouble focusing at varying distances. At times they may make intermediate objects, neither close nor far, appear blurry. They also can be somewhat distracting because the “lines” are always there even faintly in some styles. Many people adjust to bifocals after wearing them for awhile and learn to ignore the division breaks.