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Visual Hallucinations

August 24th, 2017


  • Interpretation

  • Simple visual hallucinations - flashes, dots, colours, patternsSuggestive of ocular pathology, seizure or migraine aura
  • Complex visual hallucinations - objects, animals, peopleSuggestive of Lewy body dementia or delirium, though can occur in severe psychosis
  • Autoscopic hallucinations: a visual hallucination of the patient's own self.
  • Anton's syndrome (cortical blindness): the patient reports that they are able to see and can describe the world around them, despite clear evidence that they are blindOccurs in the setting of bilateral occipital strokes
  • Causes of Visual Hallucinations

  • Sensory deprivation in normal people
  • Dementia with Lewy Bodies
  • Delirium
  • Severe psychosis
  • Anton's syndrome (cortical blindness)
  • Migraine aura
  • Seizure
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