• Bifocals

  • Bifocals - Lenses with Two Focal Lengths and Visible Line

    Bifocals have two focus distances (near and far) in one lens; the lenses have a visible line.  They are commonly prescribed to people with presbyopia (who also require a correction for myopia, hyperopia, and/or astigmatism).

  • Bifocals are for you if you need two separate prescriptions, one to see clearly at a distance and another prescription to see close. You are  both nearsighted and farsighted.  A small portion in the lower part of the bifocal lens contains the power required to correct your near vision. The rest of the lens usually is for your distance vision.

    The lens segment devoted to near-vision correction can be one of several shapes:

    • Half-moon — also called a flat-top, straight-top or D segment
    • Found segment
    • Narrow rectangular area, known as a ribbon segment
    • Full bottom half of a bifocal lens, called the Franklin, Executive or E style

    Most presbyopes these days choose line-free progressives. BUT, conventional lined bifocals have a big advantages over progressives - bifocals usually provide wider lens areas for reading and computer work than progressives.

  • It may take first-time bifocal wearers some time to adjust to the lenses. You'll need to learn how to move your eyes between the distance and reading portions of the lens. You may find an “image jump” that occurs at the visible line between the distance and the reading areas obtrusive, especially if you have mobility issues and must look down when walking. We suggest wearing them as much as possible to get used to them.

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