"Can you figure out any mental actions to take with it naively?"

"No, it has no obvious user interface."

"That is very annoying. We might be able to experiment with some of the listed abilities just by intending to do them, but..."

"I mean, I'm also not just-plain-trying to reverse gravity, on account of if that worked I don't know how emphatically it would work."

"Yeah. Without a user-friendly interface, and with such dramatic powers..."

"I probably wouldn't make a big old hole in the Land of Snow by thinking about reversing gravity too hard but, you know."

"Not something we want to risk."

"Indeed. I don't know if this might get more obvious if I had two of them, do you have a guess on that?"

"With the Sharingan you get more powers with both."

"But they're not any more accessible?"

"I don't think so, but I've never had only one."

"Except for a few minutes when you were unconscious."

"And I wouldn't have noticed then."

"Yes, quite. Hm. I'm probably taking some non-negligible risk just keeping this in, and it's not doing anything helpful, maybe I should get rid of it."

"Since we know it works, and presumably I could just switch back, it might be sensible for me to try. I might at least be able to make more sense of the input."

"Sure, whenever you and Karin are free works for me." And he has a little paper bag ready to catch the discarded eye this time. He burns it.

"I think I'm fully healed, so we can probably do tomorrow."

"...your orbit, I guess." He mops up eyegoo.

"Chakra healing makes things faster." Though Karin might be annoyed at him over the repeated eye trauma anyways. "And we can do the other eye."

"Your orbit."

Eye-roll. "I'd rather, yes."

"Lemme know when and I can stand by. And maybe have a more interesting playlist of music set up to listen to while you recover, what do you like?"

"Don't really have strong preferences."

"I diagnose you with inadequate time spent listening to music."

That gets a very faint smile. "Probably."