Ashton Kutcher reveals a super rare form of vasculitis left him deaf and blind

Ashton Kutcher has admitted that he was previously suffering from a rare autoimmune disease that left him unable to see or hear or even walk. 

In Access Hollywood's exclusive look at an upcoming episode of National Geographic's 'Running Wild with Bear Grylls: The Challenge.' The actor opened up about this rare issue and explained that he is 'lucky to be alive'.

In the clip Ashton revealed, "Two years ago, I had this weird, super rare form of vasculitis that like knocked out my vision, knocked out my hearing and knocked out all my equilibrium. It took me like a year to build it all back up. You don't really appreciate it until it's gone, until you go 'I don't know if I'm ever going to be able to see again, I don't know if I'll ever be able to hear again, I don't know if I'll ever be able to walk again.'" 

Bear responded by saying, "Wow what an ordeal, talk about strength through adversity." Ashton replied by shrugging and calmly commenting, "Lucky to be alive." "Lucky to be alive?" replied Bear. "Yeah man," said the actor. 

Ashton then became philosophical as he reflected on the ordeal that took place in 2019. "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? You start surfing on top of your problems instead of living underneath them."

Bear commented to the camera that 'storms make you stronger' and said that Ashton was 'living proof of that.'

Ashton isn't the only celebrity who has recently opened up to the public about their serious health issues. Bruce Willis retired from acting due to aphasia, a condition that actually affects a number of celebrities including Sharon Stone and Emilia Clarke. Similarly, Brad Pitt opened up on his struggles with prosopagnosia, which is a face blindness disorder that makes him seem 'remote and aloof.'

Ashton's eye-opening episode of Running Wild with Bear Grylls: The Challenge, was first released on Monday, August 8, and is available to view on National Geographic.