LENS KNOWLEDGE · DESIGN
Single vision, progressive or bifocal?
Start with the viewing task. Lens design describes how the prescription is arranged across the lens; material and coating are separate choices.
What is the difference?
| Design | Viewing arrangement | A useful dispensing question |
|---|---|---|
| Single vision | One prescribed viewing distance or task. | Is this pair intended for distance, reading or a specific task? |
| Progressive | Distance, intermediate and near areas in one lens, with a gradual change in power. | Which activities and working distances matter most to the wearer? |
| Bifocal | Distance correction with a distinct near segment. | Which segment style and fitting position suit the prescription and frame? |
Choose the design before the finish
A progressive design and an anti-reflection coating answer different questions. The design addresses viewing distances; a coating changes surface properties. The same design may be offered with different materials or finishes, depending on availability.
Use the frame and routine together
Discuss the wearer’s normal tasks, chosen frame and fitting measurements. A dispensing decision needs more than a product name. Confirm the manufacturer’s fitting requirements and available combinations before ordering.
Prepared by Hubble Vision · Updated 13 November 2026
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