Off topic, but regards "VR with Eye Tracking [...] Imagine this technology being used in a VR Silent Hill or Resident Evil. You put the headset on and start playing. You see something move in your peripheral vision, but by the time your eyes have saccaded, it’s gone. No matter how hard you try, you can’t get a good look at it. With only hints and sounds to go on, your imagination fills in the rest. [] Such a game would be –without a doubt– the scariest game ever. I can’t wait to play it."[1]

My fuzzy recollection is there was a CAVE setup (at siggraph? some years back) which used a head-mounted backwards-facing tracking camera, and the hemisphere behind you was filled with tracking markers. So if you quickly turned your head, out of the corner of your eye... apparently it created "something is behind me!" creepiness.

There's also a VR game prototype that mutates the world behind you when you are facing away. "Wait, was that chair there before?" It's disturbing.

The Shadertoy Fovea detector[2] illustrates how narrow your high-res fovea is.

[1] https://geoff.greer.fm/2016/05/14/interesting-tech-that-is-j... [2] https://www.shadertoy.com/view/4dsXzM