Does he have any major mobility issues from the stroke? There are groups that do run and bike with vision loss.

https://www.achillesinternational.org/ <--- running

http://www.torontotrailblazers.org/aboutus/aboutus.shtml <--- biking, but this one is for Toronto. But where you are from, they may have their own group.

Just because someone can't see doesn't mean they can't do what they used to do... they just need to learn some skills to do it differently.

Not sure how old your father is, but with a vision impairment learning how to use a smartphone with a screen reader can help with independence and feeling connected. Visual impairment shouldn't necessarily mean your father can't run, but you may need to put a little more thought into where and when. Some older people have reported that they like the Amazon Echo, since they can just talk to it (no real learning curve), but I'd buy him an iPhone, learn how to use the screen reader yourself, and try to teach him.

If you have some financial resources, I'd start with an Echo and some podcasts or audiobooks. Get some classic stuff like Orson Welles or something else related to his interests. Just make sure he isn't sitting alone stewing, if he's listening to something or talking to people he'll do a lot better. Also find a way for him to get exercise, whether it's swimming, walking, or running.

Don't know if he loves music, but learning guitar was a great new hobby for me, when I had to stop playing sport when vision loss kicked in.