Combine VR and AR

Hi, I believe this may have been answered in the past but I wanted to know the easiest way to create an AR app with a VR interface?

I'm using a Unity on a Mac and would like to create something similar to:

I have created a few AR apps using Vuforia, but I'd like the apps to have a VR interface so I can use the AR app using a headset and see the 3D images rendered using the front camera while in VR mode.

Any guidance on how this can be achieved?

Greatly appreciated