Two researchers in the US have taken a huge step forward in developing technology to help blind people see: they have made an artificial retina that restored normal vision in blind mice. And they have already worked out a way to make a similar device for monkeys, which they hope to quickly redesign and test for human use. Artificial retinas are not a new invention, however, the ones produced so far only produce rough visual fields where the user sees spots and edges of light to help them navigate...
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