eyeball tattoos?

has anyone heard of or seen this before?

one of my facebook freinds had his eyeballs tattooed i couldnt imagine doing that without being knocked out with general anystesia

i cant even handle eye drops let alone hours of needles poking into my eye

hows this even done outside of a surgery room?

ive seen hard core tats before but this is the craziest shit i ever saw

and before you say its photoshopped ..every 1 of his recent photos are like this

would any of u ever concider anything this...insane?