also known as multifocal LASIK, changes the shape of the eye's clear surface (cornea) to establish different zones for seeing at near to far distances.

This surgery corrects presbyopia, which causes near vision to blur as the eye's natural lens begins to stiffen, usually at around the age of 40. If you are nearsighted and have presbyopia, you may be able to see up close without your usual eyeglasses or contact lenses but not when you are wearing them.