Resolved With SteamVR, how to display BOTH eyes in the desktop preview instead of just one?

I'm referring to what you see on the computer screen when you run a SteamVR app. By default Unity displays just one eye's view on the screen, but is there any way to view both eyes side-by-side? (similar to the view you get when you use SteamVR's screen mirroring feature)

 

I am not sure if it is exactly what you want, but you can look at this maybe: https://docs.unity3d.com/Manual/MultiDisplay.html

Unity just shows the 'middle eye', so it's as accurate is possible for a single screen.

Also check this: http://mammothinteractive.com/activating-vr-split-mode-unity-tutorial/