British singer Elton John, 77, told a theatre audience on Sunday that he had lost his sight. One of the biggest selling artists of all time, the "Tiny Dancer" and "Rocket Man" star attended the launch of a show in London's West End but said he had been unable to watch the performance. "As some of you may know I have had issues and now I have lost my sight. I haven't been able to see the performance but I have enjoyed it," John said, according to the Daily Mail. John said in recent months that an eye infection had left him unable to see out of his right eye and that his left was "not the greatest", meaning he could no longer read or watch anything, and putting his ability to record any new music in future at risk.