Ashton Kutcher says he's "lucky to be alive" after dealing with a rare autoimmune disorder, PEOPLE reported.
In Access Hollywood's sneak peek at an upcoming episode of National Geographic's "Running Wild with Bear Grylls: The Challenge," the 44-year-old actor opened up about his private battle with a condition that left him unable to walk, see or hear.
"Like two years ago, I had this weird, super rare form of vasculitis that knocked out my vision, it knocked out my hearing, it knocked out like all my equilibrium," Kutcher revealed in the clip. "It took me like a year to build it all back up."
"You don't really appreciate it until it's gone," he continued. "Until you go, 'I don't know if I'm ever going to be able to see again, I don't know if I'm ever going to be able to hear again, I don't know if I'm ever going to be able to walk again.'"
The That 70s Show actor added that he's "lucky to be alive" and is now using the health scare as a learning experience.
"The minute you start seeing your obstacles as things that are made for you, to give you what you need, then life starts to get fun, right?" Kutcher said. "You start surfing on top of your problems instead of living underneath them."
Vasculitis is an autoimmune disease that causes inflammation and narrowing of blood vessels, which restricts blood flow and can cause damage to the organs and tissue.
Symptoms may include weakness in the hands and feet, abrupt hearing loss or temporary blindness in one or both eyes, according to the Mayo Clinic.
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