Bifocal/Progressive Lens

Bifocal/Progressive Lens is a multifocal vision solution commonly used in modern glasses, designed to provide users with clear vision at different distances. Bifocal lenses use the traditional bifocal design and are divided into two parts: farsightedness and nearsightedness. The upper part is designed for long-distance vision, while the lower part is used for close-up reading. This simple design was once widely popular for its economy and ease of use. However, the obvious dividing line in the lens may cause visual abruptness, especially when the wearer frequently switches between viewing distances, which may cause discomfort.
Compared with bifocal lenses, progressive lenses represent a more advanced optical design. Its most notable feature is that the lenses have no obvious dividing line, but a smooth transition of vision is achieved through progressive optical design. This design allows the wearer to switch between different viewing distances freely, from long distance to near distance, and even including medium distance, to obtain a clear visual experience. Progressive lenses effectively solve the dividing line problem of bifocal lenses, avoid the abrupt visual conversion between different focal lengths, and thus provide a more natural visual experience.
Progressive lenses are particularly suitable for users who need to frequently switch between multiple distances. For example, wearers who use computers for long periods of time, read or drive can benefit from the design of progressive lenses.