The International Dyslexia Association defines dyslexia as, “...a specific learning disability characterized by difficulties in word reading and/or spelling that involve accuracy, speed, or both and vary depending on the orthography…” Dyslexia is not a vision problem, but often exists in conjunction with other visual problems such as strabismus, binocular vision dysfunction and tracking disorders. These concurrent visual processing disorders can exacerbate the symptoms of dyslexia, making the current dyslexia interventions less efficacious. By treating the visual inefficiencies, any other interventions will become more effective.
References:
COVD’s White Paper on Vision and Dyslexia
Vision based Learning Problems; The Role of the Optometrist on the Multidisciplinary Team