Can deaf people who are mentaly ill hear voices? Can blind people hallucinate images?

Someone correct me if I’m wrong, but when one has auditory hallucinations, they are not actually hearing anything through their ears. It’s in the mind, so if that person was deaf when they were born and don’t know what sound is, they would interpret such hallucinations through whatever other means they were taught to communicate with. (touch, sign language, others)
Just a guess. But hallucinations which denote dead dudes staring at you or the family cat telling you to drink paint work with your means of understanding and interpretation, and not the senses. They are only translated in ways that make you think they come from the latter.

I would think that if they had the sense before and lost it that they could hallucinate seeing and hearing just like someone who is sighted or able to hear. The vast majority of people who are blind were born with sight and lost it from injury or illness. I don’t know if that is the case with people who are hard of hearing. I don’t even think they have to be mentally ill.

That’s all guessing, I don’t know any of it for a fact. I’m not a doctor or a therapist.

The deaf would not hear fully formed voices, but the muffled noise they are accustomed to.

Just wondering what the purpose of adding ‘who are mentally ill’ into the question? I have visual and auditory hallucinations. I am not deaf or blind. I am arguably “mentally ill”. But that’s a very debatable point. The visual hallucinations often happen when my eyes are closed and auditory ones I’m pretty sure are not actual sounds at all so nothing to do with sound coming from outside. So I would echo (ha ha) what @Symbeline said

I think the OP meant if a deaf person had schizophrenia, would they still “hear” voices?

@Dutchess_III Yes.. thank you.