So, I had an interesting day!
Right after my last post in this thread, I noticed that I couldn't read Hef's response. I kept leaning closer and closer to the monitor but I couldn't make sense out of what he wrote. Then when I looked across the hall (out my office door), I realized that I really couldn't see anything. It was like all the light was entering my eyes but my brain just could make any detail out of the patterns.
The service manager came into my office and started talking to me. Almost instantly he realized something was wrong and took me to the hospital. By the time we got there my vision had returned and I felt fine. They did a shitload of tests (blood, urine, CT scan, etc.) and pronounced me healthy.
As near as any of us can figure, I had a complex Migraine! They gave me a prescription for Imitrex, a pat on the ass, and showed me the door.