26-year-old Lena Lupari of Newtownabbey, Northern Ireland is going blind. And while you've got to feel some sympathy for her, it's safe to say it was totally her fault.

(Facebook / Red Bull)

The reason Lena is losing her vision is that she spent the past several years drinking 28 cans of Red Bull a day.

She gained a ton of weight, when she got to be over 360 pounds, she developed a rare condition where her brain swelled up and stopped her optic nerve from working right. It's called idiopathic intracranial hypertension.

Her doctors say she can start to reverse the process, but she'll need to lose at least 30% of her weight. Even after that, she still might need surgery to keep her eyesight.

On the bright side, since her vision started fading in mid June, she's completely stopped drinking Red Bull. That should also help her financially, since she was spending around $10,000 a year on it.