Ten years ago, it was difficult to imagine that a blind person could regain his sight with the help of prostheses. Our heroes were able to. Grigory and Antonina underwent surgery to insert an implant into the retina of the eye. After a long rehabilitation, they successfully use the new "bionic" vision. Antonina can even read text written in large letters. Today, science is on the threshold of another amazing technology. An implant for the visual cortex is being tested before our eyes. So far, on monkeys. Dramatic stories in the film alternate with scientific conversations about the structure and meaning of vision.

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