Bifocals are a type of optical lens that are designed to correct both near and far vision. They are typically used by people who have presbyopia, a condition that causes difficulty focusing on objects that are close up. Bifocals are usually made of two different lenses that are fused together, with the top part of the lens designed for distance vision and the bottom part for near vision. Bifocals can also be made with progressive lenses, which provide a gradual transition between the two focal points. Bifocals are a popular choice for people who need vision correction, as they provide a more natural viewing experience than single-vision lenses. They are also more affordable than other types of lenses, such as trifocals or multifocals. Some companies that offer bifocals include Essilor, Hoya, Zeiss, and Nikon. These companies offer a variety of bifocal lenses, including progressive lenses, as well as frames and other accessories. Show Less Read more
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