@Forestofenchantment @RustyCrab Basically your eye is ALWAYS dancing back and forth when you look at stuff. It has to do that because if you didn't, your cone cells would acclimate to the level of light and stop sending an image-- they detect CHANGES in brightness, not the absolute light level. What this means is that in order to keep your cells from going blank (called fatigue) it has to sweep back and forth in tiny jerky movements. Your brain compensates for this by shifting the image exactly the right amount so you don't notice it jerking back and forth.

The thing is, that spot is created by this fatigue. It's not attached to the real world, it's attached to a particular patch of cells-- but your brain doesn't know that. It thinks of it as just another part of the image, so it compensates and shifts it as well, even though it shouldn't. The result is it appears to bounce back and forth in space.

I'm back down to normal levels of manic lol.