Dad has Alzheimers and lives at home with mum. He also is severly sight impared. Mum is his carer and things are deteriorating very quickly. He takes various drugs including anti psychotics as he is becoming verbally agressive both at home with mum and out and about at the shops. He thinks mum is an imposter and not his wife even though they have been married 55 years. Tonight we went over as mum was so upset by his behaviour. He had his coat on and was saying its not his house and she was not his wife etc... I think he should be in residential care, mum thinks hes not bad enough. How bad does someone have to be? She has no life now and its a thankless task as well. Dont know what to do.