11 Facts About Dyslexia

Dyslexia was known until the 1960s as Word Blindness, and currently known as a reading disorder and is a disorder characterized by reading below the expected level for one's age.

Dyslexia is believed to be caused by the interaction of genetic and environmental factors.

Dyslexia that develops due to a traumatic brain injury, stroke, or dementia is sometimes called "acquired dyslexia" or alexia.

Dyslexia is diagnosed through a series of tests of memory, vision, spelling, and reading skills.

Dyslexia is separate from reading difficulties caused by hearing or vision problems or by insufficient teaching or opportunity to learn.

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Dyslexia is the most common learning disability and occurs in all areas of the world.

Dyslexia is a heterogeneous, dimensional learning disorder that impairs accurate and fluent word reading and spelling.

Dyslexia is a neurodevelopmental disorder, subcategorized in diagnostic guides as a learning disorder with impairment in reading .

British Dyslexia Association defines dyslexia as "a learning difficulty that primarily affects the skills involved in accurate and fluent word reading and spelling" and is characterized by "difficulties in phonological awareness, verbal memory and verbal processing speed".

Dyslexia was clinically described by Oswald Berkhan in 1881, but the term dyslexia was coined in 1883 by Rudolf Berlin, an ophthalmologist in Stuttgart.

Dyslexia used the term to refer to the case of a young boy who had severe difficulty learning to read and write, despite showing typical intelligence and physical abilities in all other respects.