the one who makes that decision. It would have to be based on medical research and known data. It would be difficult to legislate. I have to tell people they cant drive if they have certain eye conditions that impair their vision and operate a vehicle safely. There are tough calls that I have to make when its close. But there is a line set by the law that has done a good job at keeping people that cant see from having a valid drivers license. I think a similar line can be drawn for levels of mental illness. I think in the same way that drivers are sent to the eye doctor to see if he approves them to qualify for a drivers license a person with mental illness could be sent to a doctor to evaluate if their mental illness is severe enough from limiting them from having a gun. At least that way a conversation takes place and a recommendation from a professional can be given. There would have to be standards in place of when the doctor is liable and when he is not. Of course people i tell not to drive still often break the rules and drive or disagree, but many of them after talking it through with me realize that its probably the safest thing for them and others to stop driving especially if a family member is there with them to agree with that assessment and talk to their family. Standards for eyes are different from state to state. I think each state should be able to decide whats best for their state.