Board Thread:Wiki Discussions/@comment-25075055-20140410102548/@comment-25075055-20140410103353

Seelentau wrote: There's no canon timeline. He obviously lost his right eye sometime between recruiting Kabuto and the Uchiha incident. By "canon timeline", I just used the events that have happened in the manga so far, but as you say, there isn't one so ... :P

So, essentially, his lost eye was just an empty eye socket ? Obviously we will never know as Kishi doesn't seem too interested in making a storyline involving Danzo's past at this time :/