Bifocals are horrendously obnoxious. These glasses have two different and very specific optical powers that can help people who have myopis, hyperopis, presbyopia, and/or astigmatism. Seeing as your field of vision has two different parts to it, these glasses quite frequently cause headaches for their users.
Although they have been around for a while, you may not have heard of the Superfocus glasses, which is an alternative to bifocals. The most obvious reason for this being their price tag which is over $700. They come in only one style, but all have a progressive slider that will allow you to adjust the lenses’ focal point so you can see either near or far over an entire area rather than a small portion. The magic behind these are two lenses, one flexible and one firm. In between the two lenses is a clear crystal fluid that will alter in shape as you move the slider about. Different shape means a different correction, which gives you crystal clear vision.