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On Monday, Ashton Kutcher disclosed that he was dealing with a dangerous autoimmune condition.

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Ashton Kutcher's ability to hear, see, and walk was impacted for more than a year as a result.

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"Like two years ago, I got this crazy, really unusual kind of vasculitis," revealed Ashton Kutcher.

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Kutcher from the forthcoming "Running Wild with Bear Grylls: The Challenge" episode on National Geographic

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said in a special video clip made exclusively for "Access Hollywood."

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Kutcher said to broadcaster and adventurer Bear Grylls, "I rejected my hearing and my eyesight.

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I was knocked out of my equilibrium. I had to wait for about a year to get back."

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I'm not sure when I'll be able to view it again. Kutcher stated,

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"I don't know if I'll be able to hear again, or if I'll be able to walk again.

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