Introducing Sir Tabbington to the buns

I've been wondering about the best way to introduce them.

At present, I am shutting the bunnies away while I allow Sir Tabbington in and out of the room - I want him to get used to the rooms of the house and which ones he can and can't go in. My thinking behind shutting the buns away while he is in the room is that I'm worried that since he can't see to well and isn't totally settled, he might lash out if he's feeling a little insecure and these 2 friendly buns come bounding over to him, as they do with the other cats.

So I was wondering, how would any of you guys go about the introductions? At what point would you think it was ok to allow them to interact? Just to clarify, we only allow them to interact under supervision.

Thanks!