Bono Sunglasses: 'This Is A Good Place To Explain... That I've Had Glaucoma For The Last 20 Years' [VIDEO]

Bono has revealed the real reason why he is never seen without his trademark shades. 

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The 54-year-old U2 front man announced he had been struggling with glaucoma for the last 20 years in an interview for the Graham Norton Show. The interviewer asked him to take his glasses off, which is when he made the revelation.

"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, according to an Oct. 17 report by Us Weekly.

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Glaucoma can make the eyes more sensitive to light, lead to blindness and, if it isn't treated properly, can lead to optic nerve damage. Sunglasses, just like Bono's, help ease the blinding pressure, and even prevent the condition from progressing.

"You're not going to get this out of your head, and now you will be saying 'Ah, poor old blind Bono," he added.

U2 was on the BBC show to promote their latest album, Songs of Innocence. The band paired up with Apple to automatically upload the album to around 500 million iTunes customers' playlists, according to an Oct. 17 report by PEOPLE Magazine. The album was uploaded without these users permission, causing a stir in the music community.

Bono later admitted that the band may have gotten "carried away" with the album release.

"Artists are prone to that kind of think. Drop of megalomania. Touch of generosity. Dash of self-promotion," he said.