WHAT ARE BIFOCAL GLASSES?
How bifocal lenses are built
ADVANTAGES OF BIFOCALS
No need for separate distance and near glasses. Saves money and simplifies daily life.
Compared with progressives, bifocals often offer wider clear areas for distance and near, so many people adapt faster with less dizziness.
Usually less expensive than progressives—a practical option if budget is tight but you still need far and near in one pair.
The near segment is often wider than a progressive’s reading area—helpful for books and paperwork.
DISADVANTAGES OF BIFOCALS
Visible line on the lens — Others can see the segment line, which some find less attractive or “aging.”
No intermediate zone — Only far and near. Mid-range (about 50–80 cm), e.g. desktop monitors, is awkward; eyes must work harder.
“Image jump” — Crossing the line can cause a sudden shift in image position as power changes; unsettling at first.
Learning curve — You learn head and eye posture to use each zone—stairs and looking down need practice.
WHO BIFOCALS SUIT WELL
Harder to read small text or phones, but still need clear distance vision.
A wide near zone helps long reading sessions; bifocals often beat progressives here.
Lower cost than progressives while still fixing far + near in one pair.
BIFOCALS VS PROGRESSIVE LENSES
| Criterion | Bifocals | Progressives |
|---|---|---|
| Viewing zones | 2 (far, near) | 3 (far, mid, near) |
| Visible line | Yes | No |
| Cosmetics | Lower | Higher |
| Near zone width | Wider | Narrower |
| Adaptation | Usually faster | Often 1–2 weeks |
| Price | Lower | Higher |
| Intermediate vision | Not supported | Strong support |
Professional tip: If you mainly need distance + reading, bifocals are economical and effective. If you work long hours on a computer or switch distances often, progressive lenses are usually better. Visit Dien Bien Phu Eyewear for a detailed fitting consultation.
FAQ — BIFOCAL GLASSES
- Mostly for 40+ presbyopia. Young wearers usually use single-vision lenses unless an eye doctor recommends otherwise.
- The first 3–5 days you may notice odd feelings crossing the line; it usually settles. If dizziness lasts over a week, return for a recheck.
- Yes. Many bifocal designs pair with Transitions®-style tints for sun protection outdoors.
- Depends on lifestyle and budget. Mostly reading + distance → bifocals can be enough. Heavy computer use → progressives are often more comfortable.
Bifocal lenses
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