Okay so here’s how it goes. There will come a time, when you’re in your 40’s where you will be unable to read things up close. Maybe you have to take your glasses off for you to read. Maybe you might need to purchase cheap glasses from the pharmacy and put them on over your contact lenses too. But you’re starting to get annoyed because of all the on-and-off with the glasses. What to do? It’s time to consider getting bifocals. What are bifocals anyway? Curious about how these things work?
Bifocals are simply eyeglasses with two distinct optical powers. These special kind of glasses both have a correction for your distance vision on the top of the lens, and a correction to help you read on the bottom. When will you need to use it?
As children, teenagers, and young adults, our eyes have an efficient capacity to focus at near. As we get older, however, our ability to focus at near slowly decreases to the point where around 40 years of age we begin to notice that it takes a significant effort to read. It is at that point that you will begin to notice this effect, called presbyopia, which mainly involves feeling that your arms are not long enough to hold a newspaper or magazine at a position where you can read it clearly.
Bifocals are the most often recommended lenses because they provide wider lens areas for reading and other activities like using a computer. Also, there are many special-purpose bifocal lens designs available today, including special glasses for other tasks that require excellent intermediate and near vision.
Bifocals however, have been reported to cause headaches and dizziness to some users. The small field of view offered by the reading segment of bifocals can take some getting used to as well. Despite this, a lot of patients are typically satisfied with the simple use of bifocals.