About Perceptual Dyslexia also known as Irlen Syndrome or Scotopic Sensitivity Syndrome

Dr. Paul R. Whiting PhD explains the basics of Perceptual Dyslexia also known as Irlen Syndrome or Scotopic Sensitivity Syndrome (SSS).

http://www.youtube.com/watch?v=3UDoK57GQ2o&playnext=1&list=PL59A981DA899...