There's no mistake.

The Houjutsu's poison has damaged your optic nerve.

Just like I said.

Well, how bad will it be for me?

If you promise to never use Houjutsu's magic again, I'm sure the symptoms won't be able to progress...

Haha, that kind of consultation is kinda unreasonable, don't you think?

But... There is one curious thing.

What thing? Spit it out.

All of the damages on your nerve are too new.

It usually takes more than ten years of training and using Houjutsu's magic for these damages to show symptoms. But here, these damages have only been here for about a month.