It was plainly stated in the manga that his eye was a spare.@Bold
Everything you're speaking is speculation. Stop grasping at straws.
Oh, so it's okay for you to speculate? I see. I'm just going to fire your own quote back at you:It has already been shown that Madara can use Sussano without his eyes meaning Tsukuyomi would be possible without his eyes as well.
So, please show me where it was said that Madara used Tsukiyomi.Unless there is a DB entry or actual spoken fact within the manga
Speculation.Madara said he can manipulate things in the genjutsu to his liking, I'm sure time isn't ruled out