In the movie, Dune, When Piter De Vries meets a Sardaukar commander, requesting troops. There is a very eye-catching moment when he blinks one eye before the other eye.
This funny eye moment reminds me of Bill Skarsgard's performance in It, which intends to create an uneasy and eery feeling. Not sure if there is a name for this technique.
I am wondering if Piter De Vries does it to build up his character or it is simply an improvised clever moment from the actor himself.

