I also agree that getting the vet is best. Home remedies can definitely be discussed though with a vet. Tumeric being an anti-inflammatory may be helpful some cases, but in others, an anti-inflammatory can actually hinder healing (like if an ulcer is involved). Sometimes things like that can be used in conjunction with vet care when the vet is aware.
Like Jerseygirl said, Cataracts can be caused by several things. While cloudiness can be normal in aging bunnies, Glaucoma can make the lens look even cloudier as pressure pushes on the lens. Also, when a cataract develops, (and in some cases, it can actually develop within a few hours –same thing with glaucoma) inflammation can accompany this. I recently learned that this inflammation can burst a section in the eye if it not brought under control. We recently dealt with a fast developing cataract in Viv’s “good” eye, so she has an anti-inflammatory for that eye. (I will post about that another time) But bottomline, any change like this should be seen by a rabbit-savvy vet asap.
Good luck and keep us updated.