LONDON — U2 singer Bono says his ever-present sunglasses aren’t a rock-star affectation – he has suffered from glaucoma for 20 years.

The condition can make the eyes sensitive to light.

Bono told the BBC’s “Graham Norton Show” that he has glaucoma but is going to be fine.

He also acknowledged that some people were annoyed when U2’s new album, “Songs of Innocence,” was sent unsolicited to millions of people with iTunes accounts.

“We wanted to do something fresh, but it seems some people don’t believe in Father Christmas,” Bono said.