Are you having trouble reading small print? If you're close to middle-age, you might have presbyopia. It's one of the negative aspects of aging, but it's good to know that having presbyopia when you already need glasses for near sightedness doesn't mean you need to start switching between multiple pairs of glasses. Multifocal lenses will allow you to have good vision always, tending to your presbyopia and myopia with just one pair of glasses.
In the past, bifocals were widely prescribed, but they have a significant flaw; while they correct problems with both near and distant objects, everything else is blurred. To correct this problem, progressive lenses were invented, which give you and intermediate or transition part of the lens that allows your eyes to focus on the area between near and far distances. Progressive lenses, which are also known as no-line lenses, are a type of multifocal lens featuring a subtle curvature across the lens, rather than a noticeable line dividing both areas of the lens. This makes for not just clearer vision at near and far distances, but also good transitions in between.
These lenses, although better, can require some time to get used to. Even though the gentle transition of progressive lenses is more aesthetically pleasing, the focal areas are quite small because the transitional areas also inhabit space.
While these days, multifocal lenses (also called trifocals) are for presbyopia, bifocals are still employed to aid children or adolescents with issues like eye teaming, or being unable to focus properly, which in turn, can lead to eye strain.
Although it may appear to be an easy solution, it's best to steer clear of pharmacy 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.
A badly fitted pair of glasses can lead to eye strain, discomfort and even migraines. During middle age, most people will not be able to avoid presbyopia. But it's comforting to know that the right lenses can make all the difference.