Perceptual Dyslexia, is it real? Also known as Irlen Syndrome or Scotopic Sensitivity

Dr. Paul R. Whiting PhD addresses the concern of whether Perceptual Dyslexia also known as Irlen Syndrome or Scotopic Sensitivity Syndrome (SSS) is a real condition.

http://www.youtube.com/watch?v=9OD3m1z8gdI