Your brother needs to take the kitten to the vet to have the kittens eye looked after otherwise...the kitten could have an infections or worse...it's not that expensive. I've never heard of the tea bag thing. This kitten would be needing her shots by now anyways. Hopefully your brother does the right thing and brings her to a vet. Good luck. The kitten could also have worms or ear mites, it's good to check all of that out just to be on the safe side.
"The question is not, can they reason? Nor, can they talk? But, can they suffer?"