Presbyopia, or far-sightedness, is a common condition that often starts to develop in people who are 40 or older. But having presbyopia when you already wear glasses for near sightedness doesn't mean you now need multiple pairs of glasses. Multifocal lenses let you see clearly always, tending to your presbyopia and myopia with just one pair of glasses.
In the past, bifocals were the obvious solution, but they weren't all that great; even though they correct problems with both near and distant objects, everything in between is blurred. To create something better, progressive lenses were developed. These give you and intermediate or transition region which lets you focus on distances that are somewhere in the middle. How does this work? Well, progressive lenses are specially curved, unlike a bifocal lens, which is harshly divided. Because of this, progressive lenses are also called no-line lenses.
These lenses may require some time to get used to. Despite the fact that the subtle lens curve results in a product that is elegant, the lens's areas of focus are small, so that there's also room for transitional areas.
Bifocals aren't entirely dated though; they are helpful for kids and teenagers who have a hard time focusing when reading.
Even though it may appear to be an easy solution, it's best to steer clear of 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 even migraines. During middle age, most people will not be able to dodge presbyopia. But it's good to know that good, multifocal lenses can make all the difference.