What is Lens Replacement Surgery? Basically, it is the process of replacing the eye’s damaged lenses with new ones. It is similar to cataract surgery, only the procedure involves replacing the faulty lens with a new, clear one. It can correct astigmatism and should last for approximately 100 years. The end result is improved vision and the elimination of glasses. However, the procedure does come with a few distinct differences. Before you decide to undergo this procedure, be sure to know what you should expect. Here is a brief overview of the procedure. Depending on your eye condition, you may need to undergo several procedures to get the results you want.