Myself, I've had ICL surgery (Implantable Collamer Lens) as vision correction in both eyes (I wasn't a good candidate for Lasik). With it includes 100% UVA/UVB blocking. It's basically a permanent contact lens implanted behind the iris and in front of the the natural lens. So, sadly, no ultrahuman UV vision for me. My only "bionic" ability is saving my natural lens and retina from UV exposure.
I dobt know if other people can see it looking at my eyes, but on certain low light conditions, I do see a subtle elongated 'X' sorta looks like a mostly transparent '>---<' at the bottom of my vision. From talking with my Doc, its a small side effect of how they fold the lense implant when they insert it to minimize the size of the incision in the cornea. I dont normally notice it, and since its on the peripheral, it is pretty easy to ignore.
