What are multifocal lenses?
Before, if someone had trouble seeing clearly up close and far, they always had to carry two pairs of glasses. However, multifocal glasses provide perfectly clear vision at all times.
Thus, multifocal glasses are constructed with a progressive correction from the top of the lens to the bottom. The correction at the top of the lens is minimal and allows you to see objects in the distance clearly. On the other hand, the correction at the bottom is maximum and is particularly useful for reading up close.
The precursor to multifocal glasses were bifocal glasses. This type of glasses also has a reading segment, but the distinction is clearly marked. Wearers of these glasses are often annoyed by the abrupt transition between the part intended for distance vision and the part intended for reading.
Benefits
As mentioned before, you no longer need to carry reading glasses all the time. Multifocal glasses should not be exchanged. These glasses allow you to see from a distance or read without problems.
In addition, multifocal glasses have a gradual transition between the far and near part. So you don't suffer from frame skips. In addition, this makes multifocal glasses more aesthetically pleasing to the eyes of many wearers.
Multifocal glasses also have an intermediate zone, namely in the middle of the lenses. This zone is known as the 'progressive zone'. Here you can clearly see medium distances, such as screens, billboards, etc.
Possible disadvantages
Sometimes people have problems adjusting to multifocal glasses. Indeed, it may take a few days to adapt to the glasses, which may go hand in hand with slight dizziness. In addition, the perception of distances and depths may be temporarily altered.
The peripheral areas of multifocal glasses can also get in the way. These are the areas at the ends of the glasses offering less clear vision. This causes wearers to often move their heads from left to right when reading or working on a screen.
Additionally, take into account that in general, multifocal lenses are more expensive than single or bifocal lenses. It goes without saying that prices vary depending on the brand but also depending on the quality.