how can I make a game VR and not VR?

hi all!
I’m a bit in trouble working with unity VR:
the question is this:
I want that my game manages VR and not VR…
what’s the better way to do this?
at the moment the only way I found is to have VR enabled, and if the user doesn’t have VR, it runs witout VR, but if the user has VR and want play without VR, the only way is to turn off the VR…

is there a different workaround to do this?
thanks in advance

Maybe this forum post would help: En/Disable Virtual Reality through code