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Developed in the early 1960s primarily by British artist Brion Gysin, the Dreamachine is a device designed to create visual hallucinations when viewed through closed eyelids. It is made of a light bulb suspended inside a perforated cylinder mounted on a record player. When it revolves, the light is said to flash at the same frequency as brain waves during relaxation, creating an intense visual experience while the viewer’s eyes remain closed. Why is it dangerous for about one in 10,000 people? Discuss
Source: The Free Dictionary