I think we should adopt the same rigorous medical standards for state issued driver's licenses. People drive on state or federal roads all the time, with a 10 second eye-chart BS. Think of the children. And, in the case of drivers, we can point to thousands of deaths on the public highways. Many of which could be eliminated with all the anal probing that goes for a third class med.
They are giving out DLs to illegal aliens now and it takes a court action to pull a license from a 90yo now. You will never see med exams other than a DMV eye test, and even that is done by a clerk not an eye person. And no thickness of glasses matter. If you can read the top line, and even if you don't speak english, you can get a license now.