World's most subscribed YouTuber Jimmy Donaldson, also known as MrBeast, revealed that he has astigmatism. "This might sound crazy, but I thought things far away looking super blurry was normal...I got my eyes checked and apparently have a bad astigmatism," he wrote. "Started wearing contacts recently...My eyesight is 3x better and I don't squint/can...open my eyes normally," he added.