Bono in sunglasses bid to save sight of 5m people

In October last year, the U2 frontman shed light on why he wears sunglasses all the time, even indoors — he has suffered glaucoma for more than 20 years.
Bono told Graham Norton on his BBC chatshow that his trademark tinted sunglasses are not the sign of an aloof rock star. Instead, he wears them to protect his eyes from the eye condition, which can result in optic nerve damage.