A lot of people start to have problems with reading small print and seeing close objects during their 40s. This condition is known as presbyopia. It's comforting to know that 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 let you see clearly always, correcting both issues at once.
Before mulifocals, bifocals were the obvious solution, but they weren't perfect; even though they correct problems with both near and distant objects, everything else is blurred. In an effort to create something more helpful, progressive lenses were invented, which provide wearers with and intermediate or transition region that allows your eyes to focus on distances that are somewhere in the middle. Progressive lenses, which are also called no-line lenses, are a type of multifocal lens featuring a subtle curvature across the lens, rather than a noticeable line dividing the two areas of the lens.
However, it can take a bit of time to get used to these lenses. Even though the gentle transition of progressive lenses results in a product that is elegant, the lens's areas of focus are relatively small, so that there's also room for transitional areas.
Bifocals are still used though; they are helpful for kids and teens who have a hard time focusing when reading.
Multifocal lenses are most helpful when they're made to work with your specific requirements. When you're ready to get yours, 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 eye strain, discomfort and headaches. Unfortunately, presbyopia is a reality of our bodies' aging process. But keep in mind that multifocal lenses can make all the difference.