[unwind]

Until someone develops active (LED-based) contacts with high enough resolution to really shock you, that's not a great risk.

I think the current research front is at around 2^8 or 2^9 pixels, perhaps. I'd feel pretty safe from being "eye-raped" by anything on such a display. Note that I mean total pixels, not "pixels squared", i.e. a couple of hundred pixels total.

Of course, a big always-on or annoyingly flashing block of color in your field of vision even with your eyes closed would be pretty annoying. But only until you've managed to take out the contact, which is not all that hard to do with some practice.

[showerst]

Unless they overlaid a big opaque black block while you were driving at high speed...

(Granted I'm sure they'll think about that during the design phase, and maybe not allow 100% opacity or something.)