There are no official types of dyslexia. But scientists and researchers have been looking into the possibility of dyslexia subtypes however these subtypes are like pieces of a pie. They are details in a story. They help schools and families find the right support for each individual with dyslexia.
Rapid Naming Deficit: These individuals have difficulty with rapid naming of things like letters, numbers and colors when they see them. They know the names but it takes them longer to name them in a row. This is related to challenges with processing seed.
Phonological Dyslexia: These individuals have difficulty breaking down the sounds of language and matching those sounds with written symbols. It is sometimes referred to as dysphonetic dyslexia and individuals are characterized by the difficulty they have decoding (sounding out) words.
Surface Dyslexia: These individuals might be fine at sounding out words however they struggle with sight words that are unable to be sounded out(father, for example) It takes more time to plant these words in visual memory. Surface dyslexia is also known as dysedetic dyslexia or visual dyslexia. Many people have both phonological and surface dyslexia.
Double Deficit Dyslexia: These individuals are struggling with 2 aspects of reading. Double Deficit is often use to describe people with dyslexia who have difficult identifying sounds as well as difficulty with naming speed.
More research is underway and will be important as we move forward to support people with dyslexia.