I used to have a profound case of Prosopagnosia, when I would look at faces at any living beings, including humans, I would see only poker faces from them.
It kind of looked more like a rotating mask illusion and sometimes would avoid eye contact, because it felt scary to see faces ( eventually this is why most with ASD avoid eye contact ).
I used to have severe communication delays, had speech delay, very low IQ, delusions, hallucinations, painful sensory issues and self-injury behaviors from my early childhood.
It felt creepy and scary to have profound symptoms of Autism.