Bifocal glasses are generally suited towards people that experience difficulty in reading a newspaper or a book, as their eyes have suffered a number of changes due to natural aging. In such cases, people need a set of particular reading glasses, which are designed for material reading.
Another dilemma is that some people might have myopia, but still need to switch to their regular prescription glasses, in order to deal with long distance vision. In such cases, a pair of glasses made with bifocal lenses can help you. However, some people might not be properly familiar with what bifocal lenses are. Here is what you need to know about them!
What are Bifocal Lenses?
Multifocal eyeglass lenses or more commonly known as bifocal lenses contain the power of two or more lenses, which can help people, cater with a number of different distances – after you lose the ability to set the focus of your eye after a certain time, due to natural aging. This is basically known as Presbyopia and can be dealt with the help of bifocal lenses.
Major Types of Bifocal Lenses:
1. Flat-Top Lenses
Providing definite transition between distant vision and reading, the flat-top lenses are one of the easiest types of lenses to adapt to and are also called the ‘D’ lens. The reason behind this is that the flat-top lens consists of a magnifying area in the lower bottom, which is turned towards the inside like the letter D and has a flat top!
2. Kryptok Lenses
Also known as the round lens by most professionals, the magnifying glass inside this type of lens at the lower bottom is in the shape of a complete circle. This lens can restrict seeing over the top, due to the round shape, and they offer less transition between reading and distance vision.
3. Curved-Top Lenses
Most commonly known as the C-style lens in the world of optical, the magnifying area in this lens is similar to that of the D-style lens. However, the top is slightly curved outside, which forms a shape like the alphabet C. Moreover, the corners which are on the segments are frequently marketed as peripheral vision.
4. Blended Lenses
The blended bifocal lenses, or more commonly known as the seamless or invisible bifocal is the type of lens, which is designed to conceal the transition, from the distance segment to the magnification segment. This process is basically achieved by inserting a blended range of 1mm to 2mm between each segment. However, as this range sometime distorts the perspective, it may not be as easy to adapt to, as the other types of bifocal lenses.
The Bottom Line
Bifocal lenses are majorly used in the form of reading spectacles and are being revamped in different categories, in order to provide users with the best experience possible. These lenses can help you read whatever you want, after you figure out your eyesight different from a renowned optician. Hence, make sure to read all about bifocal lenses, in order to find out if they are suitable in your case or not!