Vr game correct graphics settings?

I am making a vr game, and i am trying to figure out the best settings to limit jittering and aliasing, blurry moments. I checked my games refreshrate and it is 60hz, i want it to be 90. Is there a guide out there that shows the best settings in unity, and or if i need to add anything in my scripts? Can i set the update function to update on 90hz? or do i write my own? I use a htc vive, and i use unity 2019.4.3