Bifocal and progressive lenses have their own advantages. Both are a way of correcting vision. But what a bifocal lens offers, progressives may not. Obviously because they are different. However, many people are still confused about which ones to consider. So, let’s take a glance at a list of differences or differentiating factors between bifocal lenses and progressive lenses.
Bifocal lenses correct two areas of vision- near and distant. This means the top portion is used to view distant objects while the lower part is used for closer vision and can be of varied shapes:
On the other hand, progressive lenses are technologically advanced lenses that offer a smooth vision because it is divided into three segments. The top area is for distant vision, the intermediate area is apt for computer users and the bottom part is for near vision. When you lower your eyes downward, you can easily read a book or a newspaper and when you look up, you can see distant things and when your eyes focus at the centre, the intermediate section helps you to easily view the computer screen.
Hence, the primary difference between bifocals and progressives is that the latter offers a seamless vision, eliminating the problem of image jump.
In bifocal lenses, there are two basic types- translating and simultaneous with each one having further multiple designs. While the translating bifocals let your pupil to alternate between the two power sections (distant and near) when you see upwards or downwards, the simultaneous lenses allow you to look through near and distant powers at the same time. Like, when you look downwards to read a book, the lower section makes the words appear larger and easy to read.
In progressives, the most common type is a set of concentric circles of lens powers suggested for viewing all distances.
#3. Pros and Cons
Benefits of bifocal lenses:
Drawbacks of bifocal lenses:
Benefits of progressive lenses:
Drawbacks of progressive lenses:
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