So where I live if you have a disease, physical or mental, you go to a doctor and they decide if you’re ok to drive or if you need to pass an extra test first where you are judged if you’re able to drive safely with whatever disabilities you have. This is besides the standard driving test and written test. Also everybody has to take lessons with a professional.
It’s however not perfect because the government doesn’t have access to your medical records (which is good). But that means you have to be honest on a form about your disabilities. Plus the doctor visit is not covered by insurance and costs around 200 euros.
Plus if you already have your licence there isn’t really a system in place to prevent you for driving if your health declines.