This falls under the category of: “You learn something new everyday.”
From Berkley:
Flicker rate is how fast something is moving and how fast your eye can perceive it. A bass can see a heck of a lot faster action than humans. So when you’re looking at a crankbait in the water, it’s generally not the same action that a bass is seeing. They can see more intricate action. A human’s flicker rate is 17.6, and a bass’s is 52.1. So bass can see basically three times faster motion.