Presbyopia, or far-sightedness, is a common condition that usually starts to affect those over the age of 40. It's comforting to know that developing presbyopia when you already need glasses for distance vision doesn't mean you need to start switching between two pairs of specs. This is all thanks to multifocal lenses, which take care of both problems, ensuring that you always see well.
In the past, bifocals were the popular fix, but they weren't all that great; while they help you to focus on both near and distant objects, everything else is blurred. In an effort to create something more helpful, progressive lenses were invented. These provide wearers with a transition part of the lens that allows you focus on the area between things like the newspaper and far objects like road signs. Progressive or no-line lenses are a type of multifocal lens that have a gently curved lens, instead of an obvious and harsh line dividing both parts of the lens. This provides not only clearer vision at near and far distances, but also nice, comfortable transitions between the two.
These lenses, although better, can take a small period of time to get used to. While the gentle transition of progressive lenses results in a product that is elegant, the lens's areas of focus are small, because they all need to fit.
Even though these progressive lenses (sometimes called trifocals) are for presbyopia, bifocals are often used to aid young patients who have other issues such as eye teaming, or being unable to focus while reading, which causes eye strain.
When you go get fitted for multifocal lenses, it's crucial that you're attended to by an eye care professional you trust. Multifocal lenses are most beneficial when properly fitted to your eyes, needs and line of vision.
Glasses that aren't properly customized to you can lead to eye strain, discomfort and nausea. Unfortunately, presbyopia is a reality of aging. But keep in mind that multifocal lenses can make all the difference.