Looking for serious  explanations/similar people that feel drugged or tunnel vision while driving at night? I drive for a living, and have to drive at night. For a long time now, I have dealt with feeling drugged while driving at night. It's hard to explain. I don't feel woosy or dizzy, it feels like it's in my eyes. But I can see clearly, though I have to really concentrate to comprehend signs. It just feels like I've been drugged. My reactions are fine, but I become very paranoid, and find that I'm 2nd guessing myself. I am a healthy 28 yr old female, have had bouts with hypoglycemia, but not recently. Mom thinks I may not have low blood sugar, but instead diabetes. Any ideas at all? I am locked into this job, and avoid driving at night when possible, but sometimes it has to be done. Thanks!

Summarized question: What is causing tunnel vision while driving at night?