Actually, this is hardly surprising considering that the lens has to achieve a virtual technical miracle. It is expected to correct both far- and near-sightedness, and allow the user to enjoy perfect vision every step of the way, even in the transition ranges - certainly not an easy feat. To improve close-up vision, the strength (diopter) of the lens must be increased.
Consequently, all progressive addition lenses are more concave in the bottom portion. The top portion of the lens provides long-distance vision and the small section between the two – the so-called transition or progression area – ensures perfect vision at all progressive distances, for example when you look at a computer screen. As a result of the manufacturing process, the edges of this area are out of focus – and the severity of this differs depending on the quality of the progressive addition lens design and the level of customization.
Contact lenses are a very good alternative to glasses – yet there are still a few vision solutions that are only possible with good ol' glasses.
Customized lenses for driving make driving not only more relaxing, but also increase safety significantly. But what do consumers have to bear in mind when buying glasses for driving?
Something everyone thought impossible in the past: progressive lenses that are as individual as their wearers are now the measure of all things.
No problem: with four types of progressive lenses, it’s easy to select the right one for your needs