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Oliver Sacks: What hallucination reveals about our minds


Oliver Sacks: What hallucination reveals about our minds
Oliver Sacks: What hallucination reveals about our minds
Duration: 18:48

Neurologist and author Oliver Sacks brings our attention to Charles Bonnet 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.