"I'll keep an eye out for those, then."

Sasuke nods.

"I wish you a swift recovery."

"I should be fine."

So does having mismatched eyes work, or do you have to stop having Sharingan if you want the ultra fancy legendary kind?

Mismatched eyes work, but it's possible some powers would only work with a matched set - the Mangekyou Sharingan is like that.

So maybe somebody who isn't you would be a better pick for Rinnegan outfitting. If that seems like a reasonable thing to do at all.

I think someone without any kind of eye-based bloodline would have trouble with it. From my reading it's possible someone of the Senju or Uzumaki bloodlines might not? But also I'd be hesitant to trust most people with it. 

I don't know if it's reasonable to make them in the first place.

It's a pretty wild list of powers. I don't hear the undead complaining about their side effects but I imagine some people would rather just plain be alive, though?

What kind of trouble would people without magic eyes run into?

Shinobi don't tend to complain about anything, but I think most people would prefer having a sense of touch for instance.

The usual problems when transplanting into someone without the right systems is more difficulty using powers, higher chakra cost, inability to deactivate them, and some loss of control. I might have some of those, since my body is set up for a different type of eye, but I'd probably have less of them.

How exactly does one be set up for an eye?

Can we get around any of this by using Rinnegan-bearing basement dwellers to resurrect people into or do those get wholly overwritten?

Those get wholly overwritten.

And people with the relevant bloodlines have different brain structures as well as different chakra networks around the eyes. I'm not a neurologist, but I think the area that processes visual information's a lot larger?

At the expense of what? You don't have a giant head.

No idea.

Honestly knowing my clan probably emotional regulation.

Is that your guess for other magic eye types too?

Don't know. I'm not familiar with the Hyuuga, who are the other magic eye people I know.

What do theirs do?

They can switch between normal vision and seeing chakra instead of solid objects, I think.

Sounds disorienting. Is it useful?

Yeah. Lets them effectively see through solid objects to an extreme distance, and gives them a good basis for becoming medics or manipulating other people's chakra.

You know, I'm sure some angel has figured out how to have more than two functioning eyes.

It'd be interesting if that works with bloodline-specific eyes too.

It would! It might require an angel to do it, though, they have us beat on medicine.

Probably you could make an implant of an eye outside the normal places have useful powers but not actual vision under our system.

I'm betting I can find an angel who made them see. But it might work better on daeva than on human subjects for self-concept stuff reasons.