It is trippy in a pretty literal sense. I'd wager this is the same mechanism that screws up faces for you when you take psychedelic drugs, except with that you

It is trippy in a pretty literal sense. I'd wager this is the same mechanism that screws up faces for you when you take psychedelic drugs, except with that you can be staring right at the face and still see it that way. The effect is very similar. Babies have to learn to interpret human faces so that they ignore the parts that don't matter and focus only on what typically distinguishes them. They manage to do it pretty quickly, but perhaps this is how we see faces for the first few days after we're born.