In an article about the movie Barbarian, it says the following:
Before filming began last summer, he received advice from legendary creature performer Doug Jones, including the fine line between physical expression and nonverbal overacting and another handy pro tip: Get prescription creature contacts made, else risk biting it while chasing your co-stars through those dark tunnels.
I presume "prescription creature contacts" means contact lenses that allow the actor's eyes to appear nonhuman. I don't remember The Mother character having nonhuman eyes, but maybe I just didn't get a good enough look at them.
But what did Jones mean by "biting it"? The definition that seems to make the most sense in the context of Jones' advice is:
to fall and hit the ground
But why would prescription creature contact lenses make it less likely to fall than normal contact lenses or just no contact lenses at all (assuming the actor has perfect vision). Do creature contact lenses somehow make the environment seem brighter than it really is?