U2 frontman Bono reveals why he always wears sunglasses

Bono has recently revealed that he has glaucoma for the past 20 years and this is the reason he has to wear sunglasses everywhere, while appearing on Graham Norton's show.

The U2 frontman said that he had excellent vision, but slowly the objects and lights were accompanied by cloudiness and rings, an indicator of the condition, the CNN reported. 

However, the Irish singer assured that he was going to be fine as he has been receiving good treatments and medications. Bono said there was no need to worry about his health.