In Children can be manifest by below expected reading abilities in an otherwise normal child.
All current research indicates that dyslexia is a disorder of language.
A defect in language processing causes the reading disability. Vision problems DO NOT cause reading difficulties. Because reading disorders are due to a primary language dysfunction, they should be treated as such. Treatment requires a multidisciplinary approach involving educators, psychologists and physicians. The link between vision and reading is so logical that people have thought a vision abnormality must cause the reading problem.