Cool experiment! But maybe I'm not understanding something. When a human can't see an object in sufficient detail they lean forwards to increase its apparent size in their optical field. This breaks that fundamental interaction. When you lean forward it stays the same size. Argh! In other words if your eyes are good enough to read the large text, they'll be good enough to read the small text when you lean in - nothing has changed, the system maintains the text's apparent size. If on the other hand your eyesight isn't good enough to read the large text leaning in won't help!