The Light Barrier: 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. She also complained of physical discomfort and constant difficulties with seeing and reading, even though she passed repeated vision exams. By chance, while looking for a solution to help her child, this mother encountered a controversial but scientifically proven solution that has already helped thousands. Her personal story shares with readers the latest information gathered from three continents and shows what can be done about this highly prevalent, commonly overlooked, but readily addressed problem.