Progressive Lenses vs Bifocals vs Single Vision — Which Do You Need?
After age 40, your eyes lose the ability to focus at multiple distances — a condition called presbyopia. You need one correction for distance, another for reading, and eventually a third for intermediate (computer) distance. The question is not if you need multifocal correction, but which type. Here is an honest comparison of every option.
The Four Options at a Glance
| Type | Zones | Appearance | Best For | Cost (Online) |
|---|---|---|---|---|
| Single Vision Readers | 1 (near only) | Normal; need separate distance glasses | Occasional reading only | $7-30 |
| Bifocals | 2 (distance + near) | Visible line across lens | Clear near/distance distinction | $30-80 |
| Trifocals | 3 (distance + mid + near) | Two visible lines | Specific mid-range tasks | $60-120 |
| Progressives | Infinite gradient | No visible lines — looks like single vision | Cosmetic preference, seamless vision | $30-300 |
Single Vision Readers — The Simplest Option
If you only need help with small print and are happy wearing no glasses (or your distance glasses) the rest of the time, over-the-counter reading glasses are all you need. They are cheap ($7-30 for quality pairs), available without a prescription, and you can have multiple pairs in different rooms. The main drawback: constant on-and-off as you switch between reading and distance tasks.
Bifocals — The Tried-and-True
Bifocals have a visible horizontal line separating the distance lens (top 70%) from the reading segment (bottom 30%). They provide the widest reading area of any multifocal design, and the line serves as a tactile reference — you always know which zone you're looking through. The main drawbacks: visible line (cosmetic concern for many), and an 'image jump' when your eyes cross the line. Most people adapt within 2-3 weeks and stop noticing.
Progressives — The Modern Standard
Progressive lenses (Progressives in the US, Varifocals in the UK) eliminate the visible line, providing a seamless gradient from distance (top) to reading (bottom). The trade-off: peripheral distortion in the lower outer corners that creates a 'swim' effect, especially in cheaper conventional progressives. Premium digital free-form progressives minimize this distortion with computer-designed lens surfaces. Adaptation: 1-4 weeks for most people. Not everyone adapts — about 5-10% of first-time progressive wearers go back to bifocals.
How to Decide
- Choose readers: Occasional reading, mostly contact lenses or LASIK for distance, budget-conscious
- Choose bifocals: You read extensively (wide reading zone matters), cosmetic appearance is secondary, you've tried progressives and couldn't adapt
- Choose progressives: You want invisible multifocals, you do varied tasks at multiple distances, you're willing to adapt
- Budget tip: Order a cheap pair of each type online ($30-50 each) to try both before investing in expensive progressives