Bifocal Lenses provide visual corrections for 2 fields of vision, which are Distance (always on the top portion of the lens) and Near (aka reading, which is always on the bottom portion of the lens)
Bifocal lenses are also known as Straight or Flat Tops segments. The Bifocal lenses will have a horizontal D shaped segment near the bottom of the lens that will contain the near vision power correction. We offer 2 sizes of bifocals, the FT-28mm segment and the FT-35mm segment. Please be aware that the Bifocal viewing areas and segment sizes cannot be changed. The top will always be the distance viewing area and the bottom will always be the reading viewing area.