To me, the contact lens type HUD in the Black Mirror episode "The Entire History of You" (https://en.wikipedia.org/wiki/The_Entire_History_of_You https://en.wik

To me, the contact lens type HUD in the Black Mirror episode "The Entire History of You" (https://en.wikipedia.org/wiki/The_Entire_History_of_You https://en.wikipedia.org/wiki/The_Entire_History_of_You) feels like the ideal solution as it's discreet. Wonder if it's technically possible...