What is double deficit dyslexia

Double deficit dyslexia, also known as comorbid dyslexia, is a type of dyslexia in which an individual has two distinct types of reading impairment. This may include phonological dyslexia, in which a person has difficulty associating sounds with letters or groups of letters, and surface dyslexia, in which a person has difficulty recognizing familiar words. Double deficit dyslexia can make reading and spelling extremely challenging, as it involves two distinct difficulties that can compound one another. This type of dyslexia is thought to be relatively rare, and may be caused by a combination of genetic and environmental factors.