That's what I read too. The reason I asked is because "either the distance on the first frame for the case interface : False or the distance when the set depth

That's what I read too. The reason I asked is because "either the distance on the first frame for the case interface : False or the distance when the set depth button is pressed for the case interface : True" is not entirely clear to me. When I was working on such a project, I had no way of correctly guessing the distance between the screen and eyes.