Progressive lenses change power smoothly from distance at the top to reading at the bottom, with no visible line, so they look like regular glasses and also cover middle distances like a computer screen. Bifocals have two zones separated by a visible line: distance on top and reading below, with a wider reading area but no intermediate zone. Progressives suit most people but take a week or two to adjust to; single-vision readers are simplest if you only need help up close.
Once close-up focus gets harder, usually in your 40s, you’ll need lenses that handle more than one distance. Here are the options.
Side by side
| Progressive | Bifocal | Reading glasses | |
|---|---|---|---|
| Zones | Distance, intermediate, near, blended | Distance and near | Near only |
| Visible line | No | Yes | No |
| Intermediate (screens) | Yes, narrow | No | No |
| Adjustment | 1 to 2 weeks | Quick | None |
| Price | Higher | Moderate | Lowest |
Progressive lenses
Power increases gradually from the top (distance) to the bottom (reading). They look like ordinary lenses and cover every distance. The trade-off is soft blur at the edges and an adjustment period.
Tips: choose a frame with enough lens height (often at least about 28 to 30 mm), point your nose at what you want to see, and wear them full time while adjusting.
Bifocals
A visible line divides a distance zone from a reading segment. They are easy to adapt to and give a wide reading area, but there’s no in-between zone for screens and the image “jumps” at the line.
Reading glasses
Single-vision reading lenses are simplest if your distance vision is fine. You take them on and off for close work.
Computer or office lenses
Designed for intermediate and near distances, with a wider screen zone than progressives. A good second pair for desk workers.
Ordering progressives online
You need your prescription with ADD power, your PD (ideally monocular), and sometimes fitting height. If a retailer can’t take fitting height, consider having progressives fitted in person.
Common questions
How long does it take to get used to progressive lenses?
Most people adjust within one to two weeks of wearing them full time. Move your head to look at things rather than just your eyes, and look through the lower part for reading.
Why are progressive lenses more expensive?
They are more complex to design and make, especially premium designs with wider clear zones and less edge distortion.
Can I wear progressives for computer work?
Yes, but the intermediate zone is narrow. Heavy computer users often add dedicated computer or office lenses.