What is Presbyopia?

Presbyopia is the natural age-related decline in vision that usually begins at age 40 and older. Similar to a camera lens, the cornea and lens of the human eye bundle light rays and focus them at a focal point on the retina, resulting in a sharp image transmitted to the brain. The lens of the eye can change shape to focus on objects at different distances. As we age, the lens becomes less flexible and loses its ability to change shape and adjust focus. As a result, we have difficulty seeing sharply at all distances and eventually require reading glasses or contact lenses.