This'll be fun: try staring at those white circles on the left until your eyes feel like they are popping out of your head.
How long did it take? (Note to my eye doctor: I really didn't stare at the circles. I...uh...well, I just sort of glanced at them. For about thirty seconds. Or, no more than a minute or two, anyway.)
Try the purple circles - the color is more restful for your eyes.
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