We Prefer People With Eyes
The eyes are the window to the soul, so when we can’t see someone’s eyes, we have a hard time sussing out their true intentions. If something resembling an eyeless human appears, the tiny people in our brain scramble to set off every panic alarm they can find to make us run for our lives.
Another Redditor suggested the four-year-old was talking about something far less terrifying than eyeless apparitions haunting the theater. There’s a strong possibility that the theater had statues that didn’t have discernable pupils, giving their fixed stare a soulless quality anyone would be rightfully fearful of. Maybe they could put sunglasses on them. Problem solved.