Scientists have discovered that simulating a limited number of neurons can cause visual hallucinations in mice.
The mad scientist use of this in people is obvious, but there are two very good things:
1. It could allow the creation of some really amazing visual prostheses, restoring sight to the blind.
2. It could eventually be used for some kind of advanced VR that didn't need any kind of external glasses at all.
But it's a long way from being tried in people. Mice don't even use their eyes as much as we do.
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