If you think tattoos are so over, you've got another thing coming. The latest in permanent ink? Tats on your eyeball. That's right - a sharp stick in the eye.

When doctors do it, it's called corneal tattooing; but when perfectly healthy folks looking for new horizons in tattooing, piercing, scarring, etc., do it, it's nuts.

Last month, the online magazine BMEzine.com (short for Body Modification) started chronicling three people's efforts to turn the whites of their eyes blue.

To tattoo the eyes, they used two different procedures. First they used a traditional needle with ink on it, but when the ink didn't hold, they switched to a syringe that injected ink into the eye. The most recent posts indicate that all was well, with one of the guys saying it felt like he had something in his eye.

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"It's quite amazing," says Lane Jensen, who saw the tattooing take place at a Canadian body-modification convention earlier this month. "Over the last couple weeks, it's flooded across the white and stained the eyeball perfectly," Jensen, who also publishes Tattoo & Piercing magazine, tells The Post. "It's trippy - and definitely starts some interesting conversations."