If a person wanting bifocals walks tall, which seg height adjustment is appropriate?

• A. Lower
• B. Maintain
• C. Raise
• D. No change

Answer: (A)

Seg height is about aligning the reading portion of a bifocal with the wearer’s natural line of sight when they look down to read. For someone who stands tall, their eyes sit higher in the frame, so the comfortable downward gaze to read naturally lands the near segment a bit lower in the lens. Lowering the segment brings the reading area into the user’s usual viewing zone, making near work easier without needing to tilt the head or look through the wrong part of the lens. Raising or leaving it unchanged would misalign the near portion with their line of sight, leading to less comfortable or less accurate reading.