Thank you!
With the Witch's Pupil: when you eat an Eye Berries item, you see out from one of the flower's "eyes", effectively moving your camera position to the flower you plucked it from, until you exit out. It's a bit quirky, in that you don't have free camera control but can switch which "eye" of the flower you're looking out from to give you a different angle, and the more you pluck, the less options you have.
This is implemented by creating an invisible marker entity at the flower, which the player spectates, and creating a fake player entity at the player's original position, to simulate their body still actually being there. If your body takes damage, you get snapped back out of it.
