First, try this quick visual experiment: Find two objects about 5 feet in front of you and 2 feet apart. Rapidly scan your eyes back and forth between the two objects, focusing briefly on one and then the other. Observe that, unlike a still or video camera, there is no motion blur as you shift your eyes from one object to the other. A particularly good observer will also notice a very brief blank period while shifting between the two objects—a quick fade in/fade out of the visual field. That blank period is the result of something called “visual saccadic suppression” or “saccadic masking,” which eliminates blurring and any potential ghost image that might dirty your vision like the “afterimage” that lingers following a bright flash of light.