As @Paul_Lamb has pointed out, the fovea is essentially a straw, with a large lower resolution, motion sensitive, “aiming” window around it.
The fovea is employed for accurate vision in the direction where it is pointed. It comprises less than 1% of retinal size but takes up over 50% of the visual cortex in the brain The fovea sees only the central two degrees of the visual field, (approximately twice the width of your thumbnail at arm’s length)
The brain steers this around to take multiple small snapshots of the world that is assembled into a total picture. I made an example of this process here: