High Contrast/Gamma adjustment for users with Nyctonopia through Vrtoolkit?

Yeah, I have eyesight issues that make being in darker vr titles. I don't want to ruin the experience of them but I want something to help with the dimmer areas where a flashlight is involved, etc? I honestly don't have a clue how this works but given theres not many options for adjusting things like gamma/brightness in VR titles usually I figured Reshade would be the best option to go with. 

I cant seem to find anything for contrast/gamma in the ini or user settings though the steam vr dashboard so was wondering if it was doable by anyone here?

I can suggest HDR toning or Shadows from nvidia. Both shaders can darken or lighten the picture without creating artifacts. True this is a port from a YF user, but it works quite perfectly I have tested recently.