Eyeglass lenses for presbyopia
Presbyopia is the normal, age-related loss of near focusing ability that makes reading and other close-up tasks more difficult after age 40.
This means that the usual type of eyeglass lenses you've likely been accustomed to wearing, known as single vision lenses, no longer will work well for you.
Multifocal eyeglass lenses available for presbyopia correction include:
- Bifocals: Lenses with two powers – one for distance and one for near – separated by a visible line.
- Trifocals: Lenses with three powers for seeing at varying distances – near, intermediate and far – separated by two visible lines.
- Progressive lenses: These lenses have many advantages over bifocals and trifocals because they allow the wearer to focus at many different distances, not just two or three. Because they have no lines, progressive lenses allow a smooth, comfortable transition from one distance to another.