If you are over 40 and beginning to notice difficulty reading small print, you may have developed presbyopia, a common age-related condition that prevents you from clearly seeing near objects. It's one of the down sides of getting older, but it's good to know that developing presbyopia when you already need glasses for near sightedness doesn't mean you need to start switching between multiple pairs of glasses. This is because of multifocal lenses, which correct both problems, ensuring that you always see well.
Multifocals are much better than bifocals. Bifocals corrected poor near and far vision, but often things in between were blurry. To create something better, progressive lenses were developed, which offer and intermediate or transition part of the lens that allows your eyes to focus on distances that are in the middle. Progressive or no-line lenses are a type of multifocal lens made with a gently curved lens surface rather than a noticeable line distinguishing the two parts of the lens.
But, it can take some time to adjust to no-line lenses. While the subtle transition of progressive lenses results in a product that is aesthetically pleasing, the focal areas are quite small because the transitional areas also take up space.
Bifocals aren't entirely dated though; they are used to treat children and teenagers who have a hard time focusing when reading.
Even though it may appear to be an easy solution, avoid buying drug store bifocals. Most of these ''ready-made'' glasses have the same prescription in both lenses, which will not help a lot of people.
If your prescription or fit is off you could end up suffering from headaches, eye strain or even nausea. Presbyopia catches up to the majority of us by a certain age, but it doesn't have to be restricting. A simple pair of multifocals will make a world of difference.