One family's journey to understand a barrier to reading that may affect millions of children and adults worldwide. Countless children with Irlen syndrome, involving sensitivity to aspects of light, have been misunderstood as lazy, slow, inattentive, dyslexic, ADHD, or just plain "troubled," when, in fact, what they suffer from is a correctable problem. Rhonda Stone's daughter Katie was struggling at school, despite hours of help each night with homework...