I wear dark glasses because I have glaucoma

U2 frontman Bono has revealed he has suffered from glaucoma for many years, prompting his continual use of dark glasses.

The star said he has had the condition — a build-up of pressure in the eyeball which can damage the optic nerve and lead to blindness if not treated — for around two decades.

Many had assumed his ever-present sunglasses — even indoors — were a rock star affectation, but he explained during a recording of last night’s Graham Norton Show for BBC1 that they are to help with his vision problem.