PixelOptics' chief executive and founder. Blum hopes his high-tech glasses will eliminate a problem that's been plaguing folks ever since Benjamin Franklin invented bifocals in 1784: Wearing ...

Over-the-counter reading glasses can help. But if you’ve always worn glasses or contacts, then bifocals, trifocals, or progressive lenses may do the trick. They’re also called multifocals.

Researchers have developed a prototype that uses liquid crystals to change focus in an instant, thus preventing the eye strain induced by wearing conventional bifocal glasses. Focusing through ...

Bifocal glasses may be effective in slowing the progression of myopia (nearsightedness) in children with high rates of progression, according to a report in the January issue of Archives of ...