Jack Osbourne, the son of rocker Ozzy Osbourne who rose to fame on MTV's hit reality series "The Osbournes," has revealed that he is battling multiple sclerosis.


The 26-year-old tells People magazine that he was diagnosed with the disease after losing 60 percent of his vision in his right eye. "While I was waiting for the final results, I got really, really angry," he says. "The timing was so bad. I'd just had a baby, work was going great — I kept thinking, 'Why now?' "


"Then I got really sad for about two days, and after that I realized, being angry and upset is not going to do anything at this point — if anything, it's only going to make it worse."


Multiple sclerosis is a disease of the central nervous system in which the body's immune system attacks the fatty myelin sheaths around the axons of the brain and spinal cord. This causes these critical regions to slowly miscommunicate, leading to a broad range of symptoms and impairments. 


Causes are currently unknown, although some theories point to genetics, environmental risk factors and infections as potential suspects. There is no cure. It is estimated that there are about 250,000 to 350,000 people in the United States with MS as diagnosed by a physician.


As for Osbourne, he says that his new motto is to "adapt and overcome." In a recent tweet, he thanked fans for their outpouring of support. "Thank you all so much for the kind and inspirational words. It means a lot. #adaptandovercome."


To learn more about MS or make a donation to help fund research for a cure, visit the Multiple Sclerosis Association of America site here


Related: Is it possible to treat multiple sclerosis through nutrition?

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Jack Osbourne has multiple sclerosis
Reality television actor given diagnosis after losing 60 percent of the vision in his right eye.