Jack Osbourne made waves earlier this week when he announced that he is battling multiple sclerosis. Now he's sharing the scary way in which he learned of his horrible disease -- he went blind in one eye.

Jack, 26, visited the set of his mother Sharon's daytime chat show "The Talk" on Wednesday, where he shared with the audience that he'd had symptoms for years, but didn't know it.

"I had problems with my bladder, problems with my stomach," the new father said. "And then about two years ago my legs went numb for like two months. And I just thought I'd pinched a nerve."

The alarm was finally triggered when Jack started having vision problems, starting with a black spot in his eye that worsened until "I was more or less completely blind out of that eye."

See all of Jack's comments above and find out if he's regained his vision.

To learn more about MS, click here.

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