system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - Why is it that when we look at an object in motion, our eyes can follow it flawlessly, yet when looking at a static object our eyes move point-to-point?
gpt
What you're talking about is a "saccade". It happens because the portion of your visual field which is sharp and clear is actually far smaller than you think it is--the larger clear picture you see is built up by your eyes darting rapidly over the image, building up a larger, clearer picture in your head. If you're following a moving object, on the other hand, you don't have time to do that so you just keep moving your eyes to follow the object.