Presbyopia
Presbyopia can be referred as an age-related farsightedness that can be observed in the people who are over 40 years of age. Lens in our eyes have a form that can transform. The lens in our eyes can transform by swelling by means of this special ability as objects come closer and it increase quality of eyesight. Near sight occurs in this way. After the age of 40, the eye starts to lose this ability gradually.