What is longsightedness?

Longsightedness is a natural and irreversible change in eyesight that can affect anyone, men and women alike, from the age of 40.
Because the crystalline lens, the eye’s natural lens, loses its elasticity, it becomes more difficult to focus.
Longsighted people have blurred vision close up (less than 60 centimeters), which is particularly difficult for reading – unless you have glasses that correct your sight properly.