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Experimental Chimp, Swirly things, 2007. © 2007 Experimental Chimp
"This is something that happens very occasionally, for no apparent reason. I can be walking along, and suddenly my visual field will be filled with these things, maybe 20 of them all spinning in place. They appear to be directly in front of me, perhaps a meter or two away. They last for up to a minute, then disappear. It's been suggested that this might be retinal detachment (which would be bad), but as I understand it, that's characterised by flashes from the edge of the visual field rather than things swirling around in front of you. Plus, I've been having them since I was 10 or 11 and nothing was picked up by the optometrist who did my eye test."
(Experimental Chimp's blog, July 14, 2007)
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