Brain enables sight without light

Even in total darkness, people often see glimmers of their own hands moving

DARKNESS VISIBLE  A volunteer wears an eye-tracking device as she reenacts a study, in which blindfolded people could vaguely see their hands moving in total darkness. Researchers say the feat may be possible because of connections between the brain’s motion and visual senses.

J. Adam Fenster/Univ. of Rochester 

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