Macworld Eye tracking is a critical part of the Apple Vision Pro experience. The operating system needs to know what you’re looking at at all times—it’s a critical part of the user interface, but it’s also a part of the entire graphics rendering system. Vision Pro performs foveated rendering, where the display is drawn pixel-perfect in the exact spot where you are looking and at a lower resolution as you move away from the center of your view. What’s more, the headset automatically moves the screens closer together or further apart to match your IPD (Inter Pupillary distance, or how far apart …