Cataracts And Driving What's The Best Way To Tell A Parent That It's Time To Stop Driving Due To Their Deteriorating Health?

What's the best way to tell a parent that it's time to stop driving due to their deteriorating health? - cataracts and driving

My father fought with type 2 diabetes for several years. In the last three or four years, became very ill. His time was that she lost consciousness while driving and in some accidents (injured fortunately - no one was that my father) in those accidents. The state has not revoked his license, if the eye exam, even partially blind in both eyes from cataract disease. Only in the mid-50 and can be very stubborn when it comes to freedom in Rome, dedication, wherever and whenever you want. Among the four children he can not convince him of his dangerous game, playing with life and others.