Both of these more traditional types of glasses have telltale lines in the lenses. Progressives have a seamless look. Sometimes they're called "no-line bifocals," but that's not quite right.

In the past, you could spot this type of lens by the line between the two sections. But today’s products often look seamless. Bifocals. The most common type of multifocal. The lens is split into ...

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 ...

In 1959, multifocal technology was revolutionized when French engineer Bernard Maitenaz invented the first progressive lens, the Varilux, and it was the first no-line bifocal of its kind.

A teacher demonstrated the effects of bifocal lenses on light. Video shows the lecturer passing laser light beams through eyeglasses at a school in Fushun City in Liaoning, China, on September 2.

Multifocal contact lenses for nearsighted patients correct for clear distance vision and include focal power that allows ...

The original Bifocal Lenses In Nearsighted Kids (BLINK) Study showed that having children with myopia wear high-add power multifocal contact lenses slows its progression. Now, new results from the ...