Are you over 40 and struggling to read small print? You might have developed presbyopia, a common condition affecting those who are approaching middle age. But developing presbyopia when you already wear glasses for distance vision doesn't mean you need to start switching between two pairs of specs. Multifocal lenses, which correct problems with both near and far sight, let you see clearly at all times, with one pair of glasses.
In the past, bifocals were the obvious solution, but they weren't perfect; while they help you to focus on both near and distant objects, everything in between is blurred. In an effort to create a better product, progressive lenses were made. These offer a transition region that allows you focus on everything between things like the newspaper and street signs. Progressive or no-line lenses are a type of multifocal lens that have a subtly curved lens, rather than an obvious and harsh line separating both parts of the lens.
However, you might take some time to adjust to these lenses. Despite the fact that the invisible lens curve is more elegant, the lens's areas of focus are small, so they they're all able to fit.
Bifocals still have their uses though; they are used to treat kids and teens who have a hard time focusing when reading.
It's also crucial to get fitted properly, and avoid drugstore bifocals. Many of these ''ready-made'' glasses are one-size-fits-all, which means that the prescription is the same in both lenses and are not customized for the wearer.
If you've been fitted with the wrong prescription you could end up suffering from headaches, eye strain or even nausea. During middle age, most of us will not be able to dodge presbyopia. But it's important to know that good, multifocal lenses can make it a lot easier.