"That '70s Show" and "Two-and-a-Half Men" star Ashton Kutcher opened up on Monday about his struggles with vasculitis, a rare condition of the blood vessels that can be debilitating to sufferers. In Kutcher's case, he explained to adventurer Bear Grylls in the National Geographic program "Running Wild With Bear Grylls: The Challenge" that he feared he would permanently lose his sight, hearing and ability to walk.
"You don't really appreciate it until it's gone, until you go, 'I don't know if I'm ever gonna be able to see again. I don't know if I'm gonna be able to hear again, I don't know if I'm going to be able to walk again,' " Kutcher explained. "I'm lucky to be alive."
