How do progressive lenses work?

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Progressive lenses do away with the "middle-age stigma" of wearing bifocals while giving wearers a seamless solution to their vision problems.

Bifocals

When many people in their 40s develop a problem with visual focus called presbyopia, bifocals compensate by placing a magnifying lens section in the lower half of the eyeglass lenses, usually showing as a visible horizontal line, according to All About Vision.

Multifocals

Progressive lenses use a precisely shaped lens that contains multiple focal points, or "zones," instead of placing one lens inside another as in traditional bifocals.

Viewing Zones

Multifocals place the near-vision zone at the bottom of the lens and the intermediate-vision zone at the center for reading computer displays. The upper half focuses on distance viewing.

Cosmetic Advantages

Since presbyopia afflicts middle-aged people, wearing obvious bifocals can cause age-related embarrassment. Progressive lenses do away with the dividing lines that advertise the wearer's need for bifocals.

Convenience

Wearers of progressive lenses can enjoy watching a film, working at computer or reading a book with equal ease by simply glancing upward, downward or straight ahead to view each item in proper focus.

Source:

All About Vision: Progressive Lenses Come of Age

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How do progressive lenses work?

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