Article at "Road to VR"... :
"Both the Rift and Vive end up putting a fair amount of pressure on your face. This isn’t ideal as the face is filled with muscles that like to move, especially in the cheeks and around the eyes. They don’t quite like bearing pressure either; poor placement of a headset on your face can hold the muscles in non-resting positions which is notably uncomfortable, sometimes leading to twitching. If you’ve ever squinted or opened your eyes widely while putting on one of these headsets, you’ll immediately notice the discomfort of having the muscles in your face unable to reach their natural resting position.
Sony’s approach is very different. PlayStation VR uses a ‘hanging’ style display enclosure which doesn’t rely at all on pressure from your face to keep it in place. Instead, the display hangs down from the structure of the headset while transferring a great majority of the weight to the top of your forehead (which, if you poke around up there a bit, you’ll notice has very little muscle compared to your face). From your forehead, the circle of the headset’s body wraps low behind your head to act as an anchor for the forehead section."












