If I’m remembering correctly vision is movement based, but animals have lots of ways to deal with it. Humans and other species that can move their eyeballs just like vibrate their eyes. But birds like chickens rely more on head bob I think. Couldn’t tell you what kind of muscles a tyranasaur has in its eyes.

Also being wrong on the Internet is the best way to find the right answer. So tell me how I’m wrong.