Presbyopia, or far-sightedness, is a common condition that often begins to develop in people who are 40 or older. If you already wear glasses for distance vision, and develop presbyopia, you won't have to carry a separate pair of reading glasses. Multifocal lenses, which correct problems with both near and far sight, allow you to see well at all times, with one pair of glasses.
Multifocals are far superior to bifocals. Bifocals do fix problems with both near and far vision, but often objects in between were blurry. In an effort to create something more helpful, progressive lenses were made, which offer a transition part of the lens that allows your eyes to focus on distances that are in the middle. Let's explain how this works. Progressive lenses are expertly curved, unlike a bifocal lens, which is sharply sectioned. For this reason, progressive lenses are also called no-line lenses. This provides not just clearer vision at near and far distances, but also good transitions between the two.
Progressive lenses, although better, may take a small period of time to get used to. Despite the fact that the invisible lens curve is more elegant, the lens's areas of focus are small, because they all need to fit.
While these days, these progressive lenses (or trifocals) are for presbyopia, bifocals are often employed to treat school-aged children and teens with eye problems such as eye teaming, or being unable to focus properly, which causes eye strain.
It's also important that you get fitted properly, and not turn to drugstore bifocals. Most of these ''ready-made'' glasses have the same prescription in both lenses, which will not help a lot of people.
If you've been fitted with the wrong prescription you could end up suffering from headaches, eye strain or even nausea. Unfortunately, presbyopia is a reality of getting older. But keep in mind that multifocal lenses can make all the difference.