How do the number of muscles in a cow eye compare with that of a human eye, and what does this mean for each organism?

• there a 6 muscles (extralocular muscles) that control the movement of the human eye but a cow only has 4. therefore, they can look up, down, left and right but they cannot move their eyes in certain ways that humans can, such as rolling their eyes; humans are able to move their eyes in more directions.