Unlike what many people think, Dyslexia is not caused by vision problems. It is a Developmental Reading Disorder in which the brain has difficulty processing, or recognizing, symbols.
Many people with Dyslexia have overcome learning and reading difficulties such as Richard Branson in this Dyslexia Video.
Although Dyslexia presents as a lifelong problem, it is possible to treat it with with the help of an IEP and individualized tutoring.
If you think you or somebody you know may be dyslexic, it's important to have an assessment. There are websites that can offer an initial assessment and depending on the outcome may lead you to a more professional dyslexia test.