Hi,
You told me that your father is having hallucinations(he sees what is not there actually),these are commonly seen due to hyperosmolar, hyperglycemic , nonketotic syndromes.
The cause of hallucination is usually rapid rise in blood sugar.(the cause might be some exisiting infection in body). I have never heard of hallucination due to electrolyte imbalance,however you may get it checked as(electrolyte imbalance) definitely can cause confusion.
Rest if he has very high blood sugar, dehydrat ...
Read Complete Answer