But the fight between 4th and tobi. He did space time jutsu without his eye.
He fought against danzo's guards and did his space time jutsu without his eye.
But always if he sucks something, he used his eyes.
I think Kakashi has the similar technik but he is not able to do space time jutsu.
That means tobi has 2 ninjutsus. a kekke genkai and the space time jutsu.