Is it possible to help someone without them being tested? I remember i received a leaflet offering a freebie hearing aid but when i phoned there, they said i couldn't get it for someone else who is not living here. So basically i'm stuck with something i can buy on ebay unless someone can advise another option. I wouldn't like to pay much in case it doesn't work. 

Thanks very much for your answer, i'm absolutely ignorant in this sphere and needed to hear someone with knowledge. I don't want to worsen his condition. Will refrain from buying the aid on ebay - i wasn't sure if that would help, but since it can make things worse, it's definitely not acceptable.

I will only be in Belarus for a week so not likely to get him to the doc. The biggest problem with my dad is that he is not willing to go anywhere due to his sore feet.. and seeing a doc would involve a lengthy trip to the capital with lots of walking and public transport (and not a signle visit i suppose). That's what my sister told me on the phone as they already tried to convince him to go to the doctors. He just says he will die as he is.  Stubborn old people.