---
title: What are bifocal lenses?
description: "Bifocal lenses contain two distinct optical powers in one spectacle lens, usually for distance and near vision. They are a traditional way of correcting presbyopia when distance correction is also needed. ## Design The upper part of the lens is…"
url: "https://bluefinvision.com/knowledge-base/topics/eye-health/what-are-bifocal-lenses/"
updated: "2025-12-12"
category: Eye Health
---

# What are bifocal lenses?

Bifocal lenses contain two distinct optical powers in one spectacle lens, usually for distance and near vision. They are a traditional way of correcting presbyopia when distance correction is also needed.

## Design

The upper part of the lens is set for distance, while a visible segment at the bottom provides near power. Wearers look through the appropriate portion depending on the task.

- Segments can be round or D-shaped, with various sizes
- The dividing line is visible but often becomes less noticeable with use
- Intermediate distances such as computer screens may not be optimally covered
- Lens coatings and materials can be chosen to reduce weight and reflections

## Advantages and Considerations

Bifocals offer clear distance and near zones without the peripheral distortions seen in some varifocals, but they do not provide a continuous range of focus. Some people prefer or adapt more easily to this clear separation.

- Particularly helpful for tasks requiring quick switching between near and distance
- May be less suitable for frequent intermediate work unless designed accordingly
- Driving and steps should be approached with care while adapting
- Regular review ensures segment height and powers stay appropriate