I am very worried about my 80 year old father who has recently had a spell in hospital and was?

... treated for severe urinary tract infection. As he is resilent to a lot of drugs he was prescribed gentamicin. Since leaving hospital he is suffering badly with vision, can't drive and his balance is effected. I researched the drug and found out it has devastating consequences but are they permanent? His doctor wants to sit tight and see if it settles down. Sally