Dr. Jeffery J. Machat: I am Dr. Jeff Machat, Medical Director of Crystal Clear Vision. I have been performing laser vision correction for over 20 years. I have used 17 different laser models from seven different manufacturers and have helped educate and train doctors in 20 countries. Today I am going to try and explain to you the different types of LASIK surgery. As sophisticated as LASIK has become, the procedure itself can be understood very simply. Let me start with a few basic concepts. LASIK essentially takes the curve from your glasses or contact lenses and reshapes the inner layer of your cornea with that same curve to enable you to see clearly. If you think of your cornea, the front surface of your eye like a book that has about 550 pages; with LASIK the surgeon opens the book at page 100, then removes 50 or so pages, depending upon your prescription. Then the book is closed and looks completely untouched. So when you think of the LASIK procedure, there are two steps that utilize this concept. The first step is to create that corneal flap, which is like opening the book. We can create the flap with either a mechanical blade or a femtosecond laser. In the second step, we treat your prescription, which is removing pages from the book. This can be accomplished with either a standard laser pattern or a customized or wavefront-guided pattern. The cost of the procedure, the rates of success varies significantly depending on which technique is performed for both the creation of the corneal flop and the pattern selected for treating you prescription. When a femtosecond laser created flap is combined with a customized laser pattern, this is commonly referred to as custom all-laser LASIK. This is the procedure I would have performed on my own eyes, but you should speak with your doctor about the best option for you.