Which term describes an executive bifocal in terms of its boundary?

• A. A large ridge that runs across the entire width of the lens.
• B. A semicircular segment at the bottom
• C. A faint line at the top edge
• D. A small inset near the pupil

Answer: (A)

Executive bifocals are defined by a boundary that runs edge-to-edge across the lens, creating a very wide near-vision segment. That boundary appears as a prominent ridge spanning the full width, which is the hallmark of this style. The large, continuous boundary distinguishes it from other bifocals where the near portion is smaller or the boundary is only a partial line or a subtle mark. So describing the boundary as a large ridge that runs across the entire width best captures the characteristic feature of an executive bifocal.