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What hallucination reveals about our minds: Oliver Sacks on TED.com

Neurologist and author Oliver Sacks brings our attention to Charles Bonnett syndrome — when visually impaired people experience lucid hallucinations. He describes the experiences of his patients in heartwarming detail and walks us through the biology of this under-reported phenomenon. (Recorded at TED2009, in Long Beach, California. Duration: 18:48)

Twitter URL: http://on.ted.com/39

Watch Oliver Sacks’ talk on TED.com, where you can download this TEDTalk, rate it, comment on it and find other talks and performances from our archive of 500+ TEDTalks.

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