Mark Herndon

:  In a recent interview with Billboard Magazine, the U2 front-man admitted that his penchant for dark glasses stems from glaucoma - a affliction he's battled for the last 20 years.

So, why DOES a man wear sunglasses all the time - even at night? In a six-year-old interview with Rolling Stone that reporter Jann Wenner has recently shared, Bono revealed that he doesn't wear his ever-present sunglasses just to look like a super-cool rockstar while the rest of us have to sit around being normal...