(Bono first talks about the sunglasses at 1:08, but the first minute of the interview is worth watching)
Now we know why Bono always wears sunglasses.
The U2 singer revealed he has he has glaucoma on the BBC’s Graham Norton Show.
Bono told Norton he’s had the condition – which makes the eyes over sensitive to light – for 20 years.
He said blindness is not an issue, joking “I have good treatments and I am going to be fine. You’re not going to get this out of your head now and you will be saying, ‘Ah, poor old blind Bono.'”