If the sight of someone being needled with a normal tattoo is enough to make your eyes water, then it might be best to look away now.
For body-art enthusiasts have developed a new technique that gives a whole new meaning to beauty being in the eye of the beholder.
What is thought to be the first ever "eyeball tattoo" has been inflicted on a man in Toronto - good news, perhaps, for anyone who ever dreamed of having blue eyes.
The tattooer injected ink into the eyeball of volunteer Pauly Unstoppable using a needle, until his eye was completely blue.
Just in case you weren't yet feeling squeamish enough, bear in mind that it took more than 40 tries before the eye was filled with ink.
The blue substance used was mixed with antibiotic eyewash.
The experiment was carried out for Canadian company ModProm, with those taking part insisting that Pauly would not go blind.
Pauly himself declared: "I really have to emphasize again that the procedure was extensively researched and done by people who were aware of the risks and possible complications and that it should not be casually attempted.
"Now that this experiment has been started, please wait for us to either heal or go blind before trying it."