Furcamper going blind. Your $0.02 to help next trip?

I'm not making judgements or suggestions. My Mother gave my Nephew a dog 15 years ago. he is now near blind and you have to watch movements near him or he will get your hand etc. His rear legs are arthritic and it is pitiful to see him try to sit or lie down. he is dearly loved and he loves the family but he is suffering a lot. They can't tell us how bad it is.
last I saw him he pressed his body as tight as he could to me and I scratched his ears and chin until I was tired out.