Bifocal lenses are chosen because of their affordable price.
The two distinct, clearly visible dioptric areas are the disadvantage of bifocal lenses, as this visible separation can be both distracting and uncomfortable to wear, and in many cases can age the wearer. Nevertheless, there are cases where bifocal lenses are the best solution, depending on the price range, the type of visual defect and, of course, the area of use.
Bifocal lenses are increasingly being replaced by so-called progressive – multifocal lenses, which use much more advanced technology to offer a new option for everyday eyewear wear.
Bifocal lenses in plastic or glass
The bifocal lenses can be made of glass or plastic and can also be ordered in a light-darkening version. Surface hardening and anti-reflective coatings can be added for an even more perfect finish.
The ZEISS range also includes the so-called trifocal lens, where an intermediate dioptre is formed in an upper narrow band of the lower, or reading area, which provides sharp vision at intermediate distances, for example when working.
Bifocal lens types
There are several variations on the design of bifocal lenses, so it is important to note that the shape and size of the reading part may differ between the different types.
