The bifocal lenses are made from bilayer structures of liquid crystal (LC) cells and LC polymer. These lenses split light with a left-handed circular polarization (LCP) into two focused light ...

Left and right Diagram showing how left circularly polarized (LCP) light is converted by the bifocal lens into separated beams of LCP light and right circularly polarized (RCP) light. (Courtesy: Fan ...

Bifocals are two lenses in one. They’re shaped differently at the bottom and top to help you see close up or far away. They come in both eyeglasses and contact lenses.

Researchers have developed a new type of bifocal lens that offers a simple way to achieve two foci (or spots) with intensities that can be adjusted by applying external voltage. The lenses, which ...

Young nearsighted kids who wear bifocal contact lenses that slow uncoordinated eye growth do not lose the benefits of the treatment once they stop wearing the lenses, new research shows. The study ...

Progressive lenses are an update on bifocal and trifocal lenses. Both of these more traditional types of glasses have telltale lines in the lenses. Progressives have a seamless look.

Young nearsighted kids who wear bifocal contact lenses that slow uncoordinated eye growth do not lose the benefits of the treatment once they stop wearing the lenses, new research shows.

Bifocal glasses allow wearers to focus on both far and near objects by looking through different parts of the lens. It’s commonly said that Benjamin Franklin invented these lenses, but they have ...

Future VR headsets could use a new type of lens inspired by holographic devices. The bilayer bifocal lens relies on external voltage to change the intensities in the foci.