How many people are affected with dyslexia? How common is it?
Dyslexia is thought to be one of the most common language-based learning disabilities. It is the most common cause of reading, writing, and spelling difficulties. Of people with reading difficulties, 70-80% are likely to have some form of dyslexia. It is estimated that between 5-10% of the population has dyslexia, but this number can also be as high as 17%. The symptoms of dyslexia range from mild to severe. Because dyslexia may not be recognized and diagnosed in some individuals, they do not receive the necessary treatment; others may not disclose that they are diagnosed. These mitigating factors make the prevalence of dyslexia difficult to precisely determine.
