The lens inside the eye changes shape when we look at an object up close. When we focus on a near object, the lens becomes thicker and as we look into the distance, the lens becomes thinner. As we get older, the lens may start to lose some functionality. This may lead to presbyopia.
Presbyopia occurs when the lens inside of the eye loses its flexibility and the symptoms begin to occur around the age of forty, and include blurred vision with near tasks such as reading or the classic "my arms are too short" syndrome. Patients may also notice difficulty changing focus from near to far.
Nearsighted (myopic) people may be able to read better by taking off their distance glasses. Patients that are not myopic will eventually need reading glasses or bifocals for improved near vision. An eye exam will determine the strength of lens needed to improve the near vision.