Dyslexia

Dyslexia is a learning disability that manifests primarily (mainly) as a difficulty with written language, particularly with reading decoding, reading comprehension, and reading fluency. Those who suffer from dyslexia are often unable to view letters in their proper order, and some have described seeing "words fly off the page." In humans, dyslexia is often caused by a dominant right brain. In the Percy Jackson and the Olympians series, Percy Jackson, along with other demigods, suffer from dyslexia. This is explained to Percy by Annabeth, who informs him that their dyslexia is a result of demigods' brains being "hard-wired" to interpret ancient Greek not English. It is usually coupled with ADHD. Like all demigods read a word like "arithmetic" as "tahricietm" or similar.

While in layman terms, Dyslexia covers both reading and writing in technical/medical terms, it is limited to reading, the realted written learning disorder is Dysgraphia.

The Roman half bloods may also be dyslexic, but "hard-wired' to interpret Latin instead.