How this optical illusion made me question my reality

The latest visual illusion to make me question my reality is a blurry swirl of colors that disappear if I stare at them for long enough.The illusion popped up on the r/woahdude Reddit today. But versions of it have existed since at least 1804, when a philosopher named Ignaz Paul Vital Troxler described how an image can fade away if you stare at it hard enough. For me, the image disappears almost entirely, until I realize it — then it snaps back into focus.The reason the colors disappear i