Little bit of background.  I started wearing glasses at the age three.  By the time I was 50 I was wearing tri-focals, which did not work very well.  Dr. Wang performed Lasik surgery and corrected by distance and mono vision.  I only needed reading glasses with 1.0 strength to read perfectly.  My vision gradually deteriorated with age to the point where I needed 2.5 readers and distance was no longer clear.  Dr. Wang performed Lasik a second time 11 years later.  Now I have perfect vision once again!  I could not be happier with the results.  Dr. Wang and his entire staff are very kind, professional, helpful, and extremely skillful!