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.

Just as charming as their namesake neighborhood (and romantic comedy), this top-rated pair of reading glasses checks all the boxes. Available as simple readers, bifocals, and progressives (with ...

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.

The potential savings on bifocals from eyeglasses from Zenni, EyeBuyDirect and Goggles4U is even greater than the savings for standard-vision glasses. Although LensCrafters doesn't offer ...