Focus.

Is it bad to drive when your eyes can't stay focused?

I only ask because twice now within the past 2 weeks, I've found myself driving along a freeway, desperately trying to keep my eyes tracking together and focusing on the cars and road in front of me. 

(Anybody else have that thing where your eyes want to go off in two different directions when you're trying not to fall asleep?  Used to happen to me all the time in college lectures.  Sort of like when you're taking notes as you're falling asleep, and while you're doing it you're utterly secure in the knowledge that you're grasping all the really important points, only when you go to read your notes later, they trail off first into gibberish, and then into chicken-scratch???  Really embarrassing on those occasions when I was sitting in the front row...)

My grandfather used to make a habit of falling asleep while driving.

It's, or it was, while he was alive, sort of a standing family joke.  He never killed himself or anyone else (I don't think) while falling asleep while driving, so he sort of enjoyed the luck of fools and madmen.  He and all of his passengers, who sometimes included his four children.  Who all survived to become my father and aunts (or Pumpkinshell & Jamoker's mother and aunts and uncle).  So that's what makes it sort of a joke instead of a tragedy.  You have to laugh or else you'd cry.  (Meaning utterly no disrespect, of course, to anyone who has suffered such a tragedy.) 

So anyway I'm wondering if that could be hereditary, and if so, does it mean I'm getting old?  Or just that I'm not getting enough sleep?  Or just that I should stay off the road??

G'night.