- Bifocal intraocular lenses have two sharp areas of vision (focal points): at near (about 30 cm) and in the distance. In addition to the near and far range
- Trifocal intraocular lenses also have a range in the intermediate distance (around 70 cm) in which reading without glasses is possible. This intermediate distance is becoming more and more important due to the increase in new media such as laptops, tablets or smartphones.
- EDOF intraocular lenses (‘extended depth of focus lenses’) also can improve vision in exactly this area. Intraocular lenses that combine several technologies (trifocal EDOF lenses) also exist.
In order to reduce the side effects, other lenses have also recently come onto the market which are intended to increase the depth of field by modulating the optical wave front. There are various terms for this: EDOF monofocal IOLs, Premium monofocal IOLs, enhanced monofocal IOLs, monofocal Plus IOLs, Mono EDOF IOLs, IROF (increased range of vision) IOLs…
A combination of different lens models often offers an optimal solution.
Side effects of multifocal lenses
However, becoming -independent of glasses comes at a price; you have to accept side effects:
the special optical concept can reduce mesopic vision (contrast vision) and glare and halos around light sources can be perceived, especially in the dark. Therefore, these lenses are not suitable for professional drivers.
The decision which special lens is suitable for you (if any) will be made individually based on your personal needs.