I keep my eye appointments religiously and now as a diabetic have those checks too, so know that my eyesight is, so far ,good and have appropriate glasses to wear. I will be very sorry if the times come that I can no longer drive, but have actually thought about that situation, which is partly why I moved to live in a town where there are public transport availability. Looking at the cost of running a car, it actually could be less expensive to use taxis on occasion and public transport. However the big problem is that with your own vehicle you can go at a time that suits you and wherever you wish to go. The taxis here are all very busy with school work and if you needed a taxi in a hurry in the afternoon you would have a problem, so that is again part of the wish to remain as a driver for many people.
My husband and I both had the very good test for older drivers by the police brought to a group. we belonged to. It was very worth while and ensured that people were aware of their eyesight and reaction times without endangering themselves or anyone on a road because it was a test screen and you were able to check that your driving and reaction times were still up to scratch. It tested your reactions and I actually had one of the quickest reactions of the group. In fact the tester asked me to retake the test as he seemed to not believe what it told him!
As I have driven for many years, here and abroad and been a hospital car driving as a volunteer, I think that the continuous amount of driving I do in town and in rural areas keeps me up to date.
The particular area I would like to see some testing and checking is to do with caravans. You find drivers who obviously only get their caravans out for their holidays yet dont seem to do any preparation for long trips, or make sure that they know the width and length of either their cars or caravans. Travelling up the dales as I do a great deal you meet people who almost stop at every corner, or seem to have no idea of how to drive on narrow roads or roads with passing places. As far as I know there are no local sort of practise places where people can just drive safely and make sure they remember how to drive towing after many months of just having the car. You do see many caravans swaying about rather dangerously on motorways too, and it obviously is something that is more difficult than having a motorhome. This is particulary obvious when you get things like crosswinds or bridges that traffic go over. When you hear people discussing getting ready to go away, it is always about what needs to go into the caravan, but not about trying a little run first.