In December, Bono posted a lengthy message on U2's official website, detailing the extent of his injuries after falling off his bike in New York, and revealing that his recovery had been more difficult than anticipated.

Now, in a new interview with The New York Times, the singer - sporting a newly-dyed blonde hairstyle, as seen in the article accompanying the photo - said that he still can't bend two of his fingers and repeated his fear that he might not play guitar again.

"I really used to think that my head was harder than any surface it came in contact with, and I don’t anymore," he said. "I didn't come off a Harley-Davidson. I came off a push bike and smashed myself to bits. There is no glory here."

Although 'Songs of Innocence' was released last September, U2 pushed back their touring schedule to accommodate for Bono's recovery after the accident in November. Their arena world tour starts in Vancouver on May 14th - but it won't involve any guitar-playing by their frontman.

"It feels like I have somebody else's hand. I can’t bend these," he said, referring to his ring and pinky fingers. "And this," he said, pointing to another part of his hand, "is like rigor mortis. But they say that nerves heal about a millimeter a week, so in about 13 months I should know if it’s coming back."