How does a progressive lens differ from traditional bifocals?

Progressive lenses provide a smooth and continuous transition between different prescription strengths, allowing the wearer to see clearly at multiple distances—near, intermediate, and far—without any visible lines on the lens. This design mimics the natural vision experience, making it easier for users to shift their gaze across different ranges without having to adjust their head or change glasses.

The lack of a visible line is crucial, as it not only improves aesthetics but also enhances the functionality, making it easier for users to adapt to using the lenses. This seamless transition contrasts sharply with traditional bifocals, which have a distinct line separating the two different zones of vision, making the transition between near and distance vision more abrupt and potentially disorienting for some users.

In terms of cost and comfort, progressive lenses may vary in price and subjective comfort but the main distinguishing feature of progressive lenses lies in the seamless vision transition they provide, setting them apart from bifocals.