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?
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I’ve always wondered this, why our eyes smoothly ‘glide’ along a horizontal line in our vision, but not a vertical. The eyes sort of ‘vibrate’ as you go down.
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