Like, if you are staring at a moving object, your eyeballs turn along the direction of that object, smoothly and continuously. But when you try to do it when not looking at a moving object, you can’t, your eyeballs jumps in increments. Why is that? My hands can move smoothly whether or not they are following something. Why not my eyes?
In: 10
Your brain filters strongly for moving vs stationary objects. This is why you don’t see the blood vessels crossing the front of your eyes, and can often ‘ignore’ noses and glasses.
When your eyes “stop” as you scan a stationary room they are pausing for a moment to see if anything moves, like an animal in the grass. This motion will stand out and you can react appropriately.
If the object is moving, tracking it smoothly will keep it centered, and from the muscle motion required by your eyes to accomplish this, can help predict things like the path and speed of the object. The ‘moving background’ vs ‘stationary target’ also helps properly process the image.
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