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It only happened as I was traversing this particular parking lot, about five minutes. I haven't been able to recreate it since. It was so surreal, that I stopped a couple of times and cars honked at me in the lot. Like I said, I have diplexia, but except this, no mismatch of colors. I get occasional light flashes in my peripheral vision. I've just never even concieved of this and I'm curious what would cause it.
So, do you think I just overstrained my eye? Can you do that in a grocery store? I remember when I got my first HP at work in '83 with a green screen. When I left work, everything was pink. But it was both eyes.