Presbyopia, the Greek word for “aging eye,” is a condition that causes near vision to fade with age, making it difficult to see things up-close. Presbyopia is the most prevalent eye condition in America, affecting most people after the age of 40 and everyone by their early 50s. While some lenses are used to see clearly at a distance after cataract surgery, multifocal and accommodating lenses are especially designed to combat the effects of presbyopia for clear distance vision plus a full range of intermediate and near vision, reducing the need for corrective lenses or even reading glasses.
Multifocal implants, like the ReStor and Tecnis multifocal lenses, allow focusing to occur at multiple distances by using light that enters in different parts of the eye. These advanced presbyopic lenses have the potential to reduce or eliminate patients’ need for corrective lenses altogether.
Multifocal lenses are made up of concentric circles, which vary to allow the eye to focus at different distances. The center of the lens provides distance power, with each surrounding ring being used to stabilize vision at intermediate and close range.