What hallucination reveals about our minds

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.

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By TED
(Source: youtube.com; September 18, 2019; https://tinyurl.com/dxug7fm)
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