well it's now been more than 5 months that I put off my glasses and didn't need to drive until very recently, so I had no concern about that.
I ride my bicycle a lot though and this wasn't a problem, especially on a sunny day.
I recently had to drive to take my mom to hospital, a 20 km ride.
And that was hard.
I tried without the glasses and it felt unsafe, especially since the windshield cuts some of the light off, which makes things worse.
So I used my former glasses (reduced prescription). I could see clearly with each eye independently but not with the 2 together as I would see crossed eye, which would make me see cars double... It also gave me a headache quickly.
So I prefer not to drive for now.
The improvements are not very fast in my case and I actually stopped the exercises for a month to "see" what would happen. Well, not much happened at all
So I'm back on doing them more regularly.
Coincidentally, it seems to me that my eyesight is slightly better today
I can see things on my computer a bit clearer at a distance.
This is mostly where I have noticed improvements in my own case so far, but still very far from perfect sight!
I also want to fast at some point as I'm sure it would help
Let us know how it goes for you!