Presbyopia, or far-sightedness, is a common condition that usually starts to affect people who are 40 or older. It's one of the harsher realities of aging, but it's good to know that developing presbyopia when you already wear glasses for distance vision doesn't mean you need to start switching between multiple pairs of specs. Multifocal lenses let you see clearly all the time, correcting both issues with just one pair of glasses.
At one point, bifocals were widely prescribed, but they have a significant shortcoming; even though they correct problems with both near and distant objects, middle distance is blurred. In an effort to create a better product, progressive lenses were made. These offer and intermediate or transition region which lets you focus on the area between things like the newspaper and street signs. Let's explain how this works. Progressive lenses feature a gradual curvature, unlike a bifocal lens, which is sharply divided. Because of this, progressive lenses are also called no-line lenses.
However, you may need some time to get used to these lenses. While the subtle lens curve results in a product that is aesthetically pleasing, the lens's areas of focus are small, so that there's also room for transitional areas.
While these days, these progressive lenses (sometimes called trifocals) are for presbyopia, bifocals are still used to treat young patients who experience eye problems like eye teaming, or being unable to focus while reading, which causes headaches.
Even though it may seem like a quick fix, avoid purchasing pharmacy bifocals. A lot of these types of glasses are one-size-fits-all, which means that the both lenses contain the same prescription and are not customized for the wearer.
A badly fitted pair of glasses can lead to eye strain, discomfort and headaches. During middle age, most people will not be able to dodge presbyopia. But it's important to know that the right lenses can make all the difference.