Many people develop problems with close vision during their 40s. This condition is known as presbyopia. Fortunately, this doesn't mean that those who already have glasses for nearsightedness need to own two pairs of glasses and continually change them. This is all thanks to multifocal lenses, which take care of both problems, making sure you always see clearly.
In the past, bifocals were widely prescribed, but they were far from all that great; while they correct problems with both near and distant objects, everything else is blurred. In an effort to fix this issue, progressive lenses were developed, which give you and intermediate or transition part of the lens allowing 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 distinguishing both parts of the lens. This makes for not just better vision at near and far distances, but also good transitions in between.
But, it can take a bit of time to adjust to these lenses. While the invisible transition of progressive lenses is more elegant, the focal areas are quite small because more lens space is used for the transitional areas.
Even though these progressive lenses (or trifocals) are for presbyopia, bifocals are often used to aid school-aged children and teens with eye problems like eye teaming, or being unable to focus properly, which causes eye strain.
Multifocal lenses are most beneficial when they're customized to your specific requirements. When you're ready to get fitted, make sure it's with a professional you can trust.
If you've been fitted with the wrong prescription you could end up suffering from headaches, eye strain or even nausea. Presbyopia affects the majority of us when we reach middle age, but there are ways to make it less inconvenient. A good pair of multifocals will ensure that your quality of life isn't affected.