Add your practice details to brand this guide and generate a shareable link for your patients. Your info is saved on this computer only.
Educational content only
This page is general patient education, not medical advice. It does not diagnose conditions, recommend specific treatments for you, or replace a conversation with your eye care provider. Always consult a qualified clinician before making decisions about your eye health.
Single vision, bifocal, trifocal, progressive — explained.
Once you need correction, the question becomes which lens design. Single-vision is one prescription throughout. Multifocal lenses (bifocals, trifocals, progressives, office lenses) handle multiple distances in one piece of glass. Here's the practical comparison.
Choose by lifestyle
Which lens type — by who needs what.
One distance
Single vision
Simplest, cheapest, sharpest at one distance. For children, young adults, or anyone whose visual needs sit mostly at one distance. Many adults keep a dedicated single-vision pair for driving or computer.
Old standard
Bifocals (lined)
Visible line between distance top and reading bottom. Cheap, clear in each zone. Some people prefer the obvious zone boundaries. The line and the lack of intermediate vision are the drawbacks.
Most common today
Progressives (no-line)
Smooth gradient — distance at top, intermediate in middle, near at bottom. Most modern multifocal choice. Adaptation takes 1-3 weeks. About 1 in 5 wearers doesn't adapt well; the rest love them.
For desk work
Office or computer lenses
Wider intermediate zone for screen-and-paper work, with only enough distance correction to walk around the office. Substantially more comfortable than standard progressives at a workstation.
Talk to your optical if
You're swapping between multiple pairs constantly, getting headaches with current lenses, or have a job with very specific visual demands (pilot, surgeon, jeweler). A skilled optician can match the right lens design to what you actually do all day.
Common questions
Honest answers to common questions.
Are progressives always better than bifocals?+
Not always. Progressives win on appearance and have intermediate vision built in. Bifocals win on field-of-view in each zone — no peripheral distortion. People who do narrow detail work at a specific distance sometimes prefer the wide clear zones of lined bifocals.
Do I need progressives if I only sometimes need reading help?+
Not yet. Many people start with separate reading glasses and use them only when needed. Progressives become more compelling when you're putting on readers more than a few times per day, or you don't want to keep finding them.
What are trifocals? Anyone still wear them?+
Trifocals add an intermediate strip between the distance and reading zones in a lined bifocal style. Less common now that progressives exist — but still preferred by some people who want clearly defined zones for distance, screen, and reading.
How do I know if I need office lenses?+
If you spend 4+ hours a day at a desk and your standard progressives feel narrow on the computer (you find yourself tilting your head up to find the sweet spot), office lenses will be a quality-of-life upgrade.
Can I get different lens types in the same pair?+
Not really — a single pair has one lens design. But you can absolutely own multiple pairs (single-vision distance + readers, or progressives + dedicated computer lenses) and many adults do.