Bono's eyesight is worsening, according to Julian Lennon.

No, the younger Lennon isn't an eye doctor, but he is reportedly friends with the U2 singer and was recently quoted as saying, "Bono actually has a condition with his eyes. I don’t know the exact issue, but the brightness of the sun hurts them, and it’s a deteriorating issue.”

In 2005, Bono did say he is "very sensitive to light. If somebody takes my photograph, I will see the flash for the rest of the day. My right eye swells up.” But he also admitted that his sunglasses are part of his image. "It’s part vanity, it’s part privacy and part sensitivity."

Lennon, who is also a photographer, recently took photos of U2 in Dublin rehearsing for their next album.