The fourth common refractive vision problem which clauses blurring is called presbyopia occuring in almost everyone over age forty.

This is the problem of not being able to see up close (e.g. to read) even if the vision is normal at distance with or without distance glasses or contact lenses. As the lens inside the eye becomes older, near objects, for example a book, become harder to see even if distant objects are clear. The lens is not able to focus on objects or print which are close to the eye. At this point, reading glasses become necessary. There are surgical techniques being developed to correct presbyopia.

In Dr. Nepple's opinion, there is no reliable or sufficiently safe laser or other surgical technique for the satisfactory correction of presbyopia. However, there are options and compromises which are satisfactory for many presbyopic people over 40 years of age considering laser vision correction.

One option is Monovision, which is discussed in the sections under Laser Vision Correction.

For Information about: