A few people have objected to this title and for this reason I offer you this explanation. In the early days of dyslexic research, dyslexia was known as word blindness, word blindness clinics were established in the UK.
If you would like more information on this please refer to The Evolution of research on dyslexia by Gayan. This document will give you a complete picture of dyslexic research up to 2001.
Orton the founding father of dyslexia research coined the phrase “Strephosymbolia” this is Greek for twisted symbols. I believe that “Strephosymbolia” is a better description than the word dyslexia which is also Greek for difficulty with words.
In reality the word dyslexia in meaningless. Basically it is saying you have difficulty with reading and writing.
I hope that every one agrees that no one can read a book with their eyes closed. There is no phonological signal transmitted from the pages that can be read phonologically. This means reading is primarily a visual process. Therefore sight is primary if you can’t see the text you will not be able to read it. Every thing else associated with reading and writing is secondary. Time and time again subjects have complained that they can’t see the text or that it appeared to be moving or distorted which explains the early use of term word blindness.