A contact lens that has technology that enables you to capture video and you can activate it literally with the blink of your eye? As interesting as it sounds, I'm going to pass. But that's what Sony's patent says its contact lens, in development, will do.
According to submitted patent plans, the lens will have embedded sensors that will be able to tell the difference between a normal blink and a blink to activate a recording device. Images and video would be stored within the lens, around the iris and piezoelectric sensors would convert eye movement into energy to power the lens.
I say this will never happen in our lifetime because at the moment, Sony's technology isn't small enough, but I probably would have said the same thing in the '90s about smartphones. But with healthy competition from Google (who are making a super contact lens of their own), this monstrosity could happen sooner than we think.