May your friend be blessed for helping. Though of course we don't want to think of it being necessary, cats do very well after successful enucleation. There are a LOT of kittens requiring one, sometimes two, if they are born on the streets. I advocate for a lot of them in my work.My friend took the kitty to the vet. It was a full grown black cat. The eyeball was not completely knocked out, my neighbor had told me that it was hanging out. But still, it will probably have to be removed because of lacerations. I am sad for the kitty.
As for the devil that did that, may it receive Justice a thousandfold, very quickly, and never be able to do that, or anything else again. *With NO apology. I advocate for capital punishment for anyone, of any age, that wilfully harms any cat, as was law in ancient Egypt.*