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Uses for the contact lens camera range from facial recognition and picture-taking to getting directions or receiving warnings about oncoming vehicles. The image capture device would likely sync with a smartphone, allowing most of the heavy-duty processing and display to be done there.
There will come a time where electricity will fail, and power will not be around to run these things...and after years of relying upon it...what would you do without it?
You can't "google" how to live.