How are bifocals different from regular glasses?
Very simply, bifocal spectacles will help you see objects far away and close up, with no middle ground. While bifocal lenses used to have a visible line separating the near and distance prescriptions, they now come with an invisible, seamless transition between two distinct focal areas.
Who actually invented bifocals?
Why can I suddenly see better without my glasses?
If you think that you are reading better lately without your glasses on, see your optometrist or ophthalmologist. If your near vision is suddenly better than ever, chances are that your distance vision may be worse. Sometimes, when second sight occurs, what is really going on is that you are becoming a bit nearsighted.
What purpose do bifocals serve?
Bifocals are glasses that have both a correction for your distance vision on the top of the lens, and a correction to help you read on the bottom. These lenses have a very large area devoted to your distance vision, with a smallish insert or segment that allows you to focus on objects up close.
Why did Benjamin Franklin create the bifocals?
Benjamin Franklin (1706-1790), one of the Founding Fathers as well as an author, printer, and scientist, invented bifocals because he suffered from presbyopia, a condition that means “age of sight” and that makes it harder for the eye to adjust to seeing objects at different distances as one ages.