Thanks for finding some awesome videos and documents.
Saul has one eye and the second (blind) will move forward as to focus on food before he eats (like automatic dual focus-- before shooting).
I had a panther chameleon that had one eye removed due to cancer. We wondered how he would eat after. I helped him out at first by touching the cricket I would be holding between my fingers to his mouth and he would eat it. Bit by bit I moved the cricket further from him…gradually he figured out that by moving his head back and forth a bit (triangulating, I call it) he could figure out where the cricket was and get it. Soon he was eating normally again! Amazing critters in many ways!
The vet was amazed at him too…he said he just leaped up, when he came out of anesthesia and ran around like nothing had ever happened to him.
He did however tend to walk in circles for a few weeks after the surgery…but I think it was part of his learning to see with one eye.