| Her beady eyes narrow and her caterpillar brows furrow together over the thick rims of her bifocals. |
| In 1760, Benjamin Franklin instructed a London firm to make him spectacles with two types of lenses fitted together, thus inventing bifocals. |
| The plastic marvel even had a sort of visor that folded out to keep the drops off Marge's thick bifocals. |
| He put on a pair of glasses with clear, thick lenses that looked like bifocals. |
| Franklin invented the lightning rod, bifocals, the Franklin stove, and an artificial arm. |
| So our aim is to restore the ability to change the focus in older people, so that they don't need reading glasses or bifocals. |
