Visual hallucinations of the pattern type.
D005556:Form Perception / Q000502:physiology*; D006212:Hallucinations / Q000503:physiopathology*; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D014793:Visual Cortex / Q000503:physiopathology*; D014795:Visual Pathways / Q000503:physiopathology