Bono reveals he wears sunglasses because he suffers from glaucoma

The U2 frontman says he's suffered from the eye condition for 20 years

U2 frontman Bono has revealed that the reason why he persistently wears sunglasses indoors is that he suffers from glaucoma.

During the filming of BBC One’s Graham Norton show, the singer confirmed that he’s suffered from the chronic eye condition for the past 20 years.

“This is a good place to explain to people that I’ve had glaucoma for the last 20 years. I have good treatments and I am going to be fine,” he said on the show. Adding: “You’re not going to get this out of your head now and you will be saying, ‘Ah, poor old blind Bono.'”

The illness is caused by a build-up of pressure in the eye socket, which leads to sensitivity to light and can result in blindness if left untreated.

U2 recently gave away their latest album ‘Songs Of Innocence’ for free via iTunes. Earlier this week, Bono apologised for the giveaway, admitting to a “drop of megalomania”.

Iggy Pop criticised the marketing ploy, stating that the band were trying to force their music upon consumers.