Over 20 years ago I had the RK procedure, which helped for a long time. But the last 5 years my vision was again going downhill, to where I could not see to function without glasses. Many doctors do not want to do post-RK work. Dr. Wang performed LASIK, and the result is near biblical. I went from 20/500 to to 20/25.  Thank you Dr. Wang for your work.