Presbyopia is the eyes’ loss of ability to see clearly at normal reading distances, a normal part of the aging process. (Literally “old eye”, the over 40’s problem!) As the lens inside the eye naturally ages it becomes thicker and less flexible. This results in a loss of ability to change focus from distance to near as rapidly, and ultimately a need for reading glasses to maintain comfortable vision at near. Individuals who wear glasses for distance vision may choose to have bifocal or multifocal lenses to avoid having to have two pairs of glasses.