The 77-year-old music legend lost the vision in his right eye because of an infection and now, according to The Sun newspaper's Bizarre column, he has had to "simplify" his usual signature for the special edition of his new album Who Believes In Angels?
The Crocodile Rock hitmaker now signs his autograph simply as E - and will complete it with the letter X to represent a kiss.
John revealed in December he hadn't been able to see his new musical The Devil Wears Prada properly, but said the cast "sounded great" when he attended a charity gala event put on by the stage adaptation of the 2006 film.
"As some of you may know I have had issues and now I have lost my sight," he said.
"I haven't been able to see the performance, but I have enjoyed it"
Prior to that, John revealed that he had been battling an infection and while he hoped he would be able to see properly again, he was currently unable to work on new music because of his limited vision.
"It's been a while since I've done anything. I just have to get off my backside," he told Good Morning America.
"I unfortunately lost my eyesight in my right eye in July because I had an infection in the south of France.
"It's been four months now since I haven't been able to see. My left eye is not the greatest," he said.
"There's hope and encouragement that it will be okay, but I'm kind of stuck in the moment, because I can do something like this, but going into the studio and recording, I don't know.Â
"Because I can't see a lyric for start."
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