The following video is about Wave Design.  I use many  methods   to get optimum results for my patients. However, Wave is one of my favorite approaches.

Wave design is excellent for patients who have higher prescriptions and/or  moderate astigmatism.  The difference between Wave and the other fitting techniques is that Wave generally  more closely matches the curve of the cornea.  I believe, this allows us to get faster molding.  We can also do more sophisticated molds.  With astigmatic corneas we can actually mold the cornea to a different extent in one plane vs. another.

Washington Diplomat Article on Refractive Procedures (Including Ortho-K!)

Here's a great article comparing  all the refractive procedures of Lasik, Lasek, PRK and Ortho-K: