Presbyopia

Age sight degradation or Presbyopia occurs when the elasticity of the eye lenses become weaker and staler, the older one becomes. Because the eye is normally programmed to focus on a distance further away the lenses are pressed together when they need to focus on objects nearby. This becomes more difficult when the eyes lenses lose their elasticity with age. At the end it means that it is more difficult for the eye to see things sharply from nearby. This is so called age sight degradation.

Presbyopia begins to develop in middle age and becomes increasingly worse making it increasingly important to use bi-focal contact lenses or reading spectacles. If one delays with this before long one notices that newspapers and books must be held at longer and longer distances so as to be read. For near sighted people this can mean that they sometimes need to remove their spectacles or contact lenses so as to read from normal distances.