The photo shows the horizon. Look closely. It seems to be deepened and not upset.
It’s a matter of your eye optics. While we civilized people have convex optics, and we need GPS navigation to travel, wild geese, for example, have concave optics, and do not need GPS navigation, and never get lost when flying to the other end of the world.
It might seem that this question is not related to training, but that would be a very big mistake. When you are performing a conscious movement, it depends very much on which optics you watch and control the object of your movement that is your body.
