There's an episode of Charlie Brooker's Black Mirror in which people can play back memories directly to their eyes.
The ability to do so ends in tragedy and horror after one man goes through every interaction his wife had with another man to piece together an affair.
He confronts the other man and demands to view his interactions with his wife. It's as depressing as it sounds.
Well now that technology is within grasp. South Korean tech giant Samsung patented contact lens which can record footage, take photos and project augmented reality on to eyes, controlled by something as simple as blinking.
The patent was filed in 2014 but revealed just days ago meaning Samsung may have been working on the tech for a while now.