I've been debating whether I should post anything here, but as a part-time remedial driving instructor, I've heard first-hand what taking your eyes off the road for just a moment can do. It can kill, and I've had folks in my class that have done just that. If anyone ever thinks his/her medical condition will even remotely put himself/herself or other drivers into harm, then he/she should hand over the keys. Sorry that this may seem strong, but I just had to post this. Granted, there are many days when I don't remember the drive home, but if I ever felt like I was going to have difficulty keeping my eyes open and maintaining the physical ability to drive safely, then I would call my partner to come get me.