I assume things will look about the same but blurred by the shutters. Your eye would focus on the subject and would blur out the shutters as good as it can. Hold a pencil in front of your eye and look at something in the room.
But wearing them as sun protection is a really bad idea!
Your eyes feel less irritated by direct sunlight so you would assume they work. But actual shades filter out hazardous UV-light. So when staring into the sun it doesn’t damage your eyes.
While with the shuttershades you would not have the natural squinched eyes reflex thus exposing your eyes to a hazardous amount of sunlight.