My FiL is still driving at 81 and he gets checked every year without fail because he doesn't want to lose his licence. He's not bad enough for laser treatment, but will have it if it means he can continue to drive. He lives on his own now, so he was worried when he was first diagnosed, but now it's just another health thing to cope with.
My friend's father had the laser treatment in November and was so impressed by how easy it was that he told everybody all the details when they asked how he was!
. He'd bought a brand new car last year and only drove it for a few months before deciding not to drive anymore. We think he must have had a scare when he was driving, but he never said anything. He's been back driving since before Christmas and is now a happy bunny. 
I know there's no point in saying don't worry, but hopefully these posts will help you feel a little bit better. 