You see mainly a flat surface? Why is that? Your perspective relative to your distance to the ground is identical to the ground's perspective. So you're on the floor, it's impossible to see a curve anywhere, because you aren't high enough to see any form of curve. Now, imagine this in a child, still developing and maturing, especially less than 2 years old. they get dropped, they sustain possibly fatal injuries. But, the brain is on almost a 1ms delay on taking any form of stimulus. So, in that 1ms, they open their eyes after falling, seeing that flat surface. It becoms comforting, becomes their perspective
