Definition of Dyslexia by the International Dyslexia Association:



The Texas Education Code 38.003 defines dyslexia as follows:

Dyslexia means a disorder of constitutional origin manifested by difficulty in learning to read, write, and spell despite conventional instruction, adequate intelligence, and socio-cultural opportunity. Related disorders include disorders similar to or related to dyslexia such as developmental auditory imperceptions, dysphasia, specific developmental dyslexia, developmental dysgraphia and development spelling disability.