Contrary to our impression, our eyes (and eyes in general) do not see continuous motion. What they do is take a quick succession of “pictures” which are blended together in the brain giving us the impression of motion. It is the same idea as used in motion pictures and TV. What is actually projected on the screen is quick succession of still pictures, but the brain blends them together into seeing motion.
The question is: How many “pictures” per second do the eyes take? This has been tested and determined for many species. It turns out that this species of shrimp has among the fastest. That is, its eyes take the most frames per second of any species tested.