A nurse tilts her head back to read the small numbers on an IV bag with her current bifocals, causing neck strain. Which lens design should be discussed?

• A. Single-vision lens
• B. Progressive lens
• C. Double-segment bifocal lens
• D. Occupational lens

Answer: (C)

When you need to read small, close-up details, you want a lens that provides a clearly defined near viewing area in a predictable place. A two-segment bifocal has a distinct near segment built into the lower part of the lens. This dedicated near zone gives you a reliable magnified view for close tasks like reading numbers on an IV bag, without having to hunt for the right part of the lens. By using that specific reading area, you can maintain a more natural, upright posture and minimize the neck strain from tilting the head, since your eyes are trained to look down into the near segment at the typical working distance. In contrast, single-vision lenses don’t offer magnification for near work, progressive lenses blend distance, intermediate, and near zones but require careful gaze placement through a curved field, and occupational lenses optimize intermediate and near for work distances but are a broader solution not as focused on a fixed near reading segment.