Alice in Wonderland syndrome, named after the novel written by Lewis Carroll also known as Todd's syndrome is a disorienting neurological condition which affects human perception. Sufferers may experience micropsia, macropsia, or size distortion of other sensory modalities. A temporary condition, it is often associated with migraines, brain tumors, and the use of psychoactive drugs. AIWS is fairly common in childhood, with many people growing out of them in their teens. It appears that AIWS is also a common experience at sleep onset.The most prominent and often most disturbing symptom is that of altered body image: the sufferer will find that they are confused as to the size and shape of parts of (or all of) their body.