Many people begin to notice problems with reading small print and seeing close objects during their 40s. This is called presbyopia. If you already struggle with distance vision, and develop presbyopia, you won't need to start carrying and switching between two pairs of glasses. Multifocal lenses, which correct both myopia and presbyopia, help you see clearly at all distances with one pair of glasses.
Multifocals are far superior to bifocals. Bifocals corrected poor near and far vision, but left everything in between a little blurred. To rectify this problem, progressive lenses were developed, which provide wearers with a transition region allowing you focus on everything between near and far distances. Progressive or no-line lenses are a type of multifocal lens made with a subtle curvature across the lens surface instead of an obvious and harsh line separating the two parts of the lens. This provides not just clearer vision at near and far distances, but also good transitions in between.
However, you might need a bit of time to get used to no-line lenses. While the subtle transition of progressive lenses results in a product that is elegant, the lens's areas of focus are small, so they they're all able to fit.
Bifocals are still used though; they are used to treat kids and teenagers who have a hard time focusing when reading.
When being fitted for multifocal lenses, make sure it's with an eye care professional you trust. Multifocal lenses work best when they're customized to your unique eyes, prescription and line of vision.
If you've been fitted with an inaccurate prescription you could find yourself suffering from eye strain, discomfort and nausea. Unfortunately, presbyopia is just a part of our bodies' aging process. But don't forget; multifocal lenses can make all the difference.