There are many different variations of bifocal lenses available today, many of them fulfilling the same purpose or even multiple purposes.Bifocal eyeglass lenses contain two lens powers to help you see objects at all distances after you lose the ability to naturally change the focus of your eyes.
Bifocal Lenses are made up of two different power strengths in a single lens for distance and near vision. The upper and lower part of the lens is separated through a visible distinct line. There is no gradual distinction between the two. In addition, you have to look up and down to switch between the prescriptions you need. However, with a long-distance prescription at the top and near vision at the bottom.