So, I am somewhat confused about his original story, so I searched it up, and on most reliable sites it said that he has NO ORIGIN STORY. People have written multiple origin stories, but there is no correct or original one... technically. He spawned from this story;

A man named Mitch moves in with his brother Edwin after his house is foreclosed. A week later, Mitch wakes up with a large gash on his cheek. After going to the hospital, the doctor reveals that Mitch's left kidney had been surgically removed overnight.

Around midnight that night, Mitch wakes to see Eyeless Jack over his bed, wearing a blue mask with black liquid dripping from empty eye sockets behind the mask. Mitch manages to grab his camera and take a picture before Jack attacks, clawing at his chest. Mitch escapes and flees into the woods, where he trips and is knocked unconscious.

When Mitch awakens in the hospital, it is revealed to him that Edwin had been killed the previous night. His parents drive him to the house to collect his belongings. When he enters, Mitch sees Edwin's corpse and a small object laying next to it. He observes it to find that it is his kidney with a bite taken out of it, covered in a black substance.

So there you have it. This is the ORIGINAL story. Meaning anything this story says about eyeless jackass is true. Meaning; he only eats kidneys. Not the whole body, or other body parts. KIDNEYS.

So, any origin story you have read is FAN MADE. Haha! Guess you'll never really know how it all started.