Hoda Kotb was out of sight — literally — when her contact lens went missing while she was live on air, prompting co-host Jenna Bush Hager to ask if she was having a “medical emergency.” The longtime host’s mishap occurred during Thursday’s episode of “Today with Hoda & Jenna,” and prevented her from reading her lines on the teleprompter. “I think I have a contact stuck in my eye way up here,” she said at the end of the program’s first segment. “I don’t think I took it out last night and I can’t find it. It feels like it’s in there!” Kotb, 59, went on to explain that she wasn’t joking and consi…