Bounces have been reduced by a lot. I will test this out later to see if it can work, but for now the render times are too long so I reduced them by a lot. And the bigger question is if the pupil is too large… it looks OK according to the references I’ve seen (some rabbits really seem to have huge pupils, so I went with that).
Here’s what I got, though (I was testing out brightness of iris, and had to up it to make it more noticeable):
