If you're middled-aged and beginning to observe some difficulty reading books and newspapers, you may have developed presbyopia, a common age-related condition that prevents you from clearly seeing near objects. It's comforting to know that developing presbyopia when you already need glasses for near sightedness doesn't mean you now need multiple pairs of specs. This is all thanks to multifocal lenses, which help you with both problems, ensuring that you always see clearly.
Multifocals are much better than bifocals. Bifocals do fix poor near and far vision, but left everything in between a little blurred. In an effort to create something more helpful, progressive lenses were developed, which offer and intermediate or transition part of the lens allowing your eyes to focus on the area between near and far distances. Progressive lenses, which are also known as no-line lenses, are a type of multifocal lens made with a subtly curved lens surface rather than an obvious and harsh line separating both areas of the lens.
But, you might require a bit of time to adjust to no-line lenses. Even though the invisible transition of progressive lenses results in a product that is elegant, the focal areas are quite small because more lens space is used for the transitional areas.
Bifocals still have their uses though; they are used to treat children and teens who have a hard time focusing when reading.
Although it may seem like an easy fix, avoid buying pharmacy bifocals. Many of these types of glasses have the same prescription in both lenses, which will not help a lot of people.
A badly fitted pair of glasses can lead to headaches, eye strain or even nausea. During middle age, most people will not be able to dodge presbyopia. But it's important to know that the right lenses can make it a lot easier.