After my first couple of hours with Oculus, significant eye strain and headache. I’m still at the bottom of a steep learning curve and eager for all the “how to” hints that are offered. After adjusting the lense focus, there was slightly less out of focus issue. Still working on the double vision issue while looking in the sight. Some wiggling around tends to reduce it someonwhat. Just need to dial it in and eliminate it.
I have and still do get eye strain, but its less after stopping all that shimmying around. All the correction software is great when your 3' away from monitor, but when your 1/2" away, u c all the correction up close. Since the rift has no clarity anyways, for me, turning off helped a lot.
I also made a foam spacer piece that loosely fits the rifts face ring. It pushes the rift away from my face around 3/8". It provides cushioning. Backing the rift up helped a lot. Something about my body type vs the rifts generalized fit. I believe the double site is just bad setup????
Remember, horizontal clarity is based on where the rift sits, up/down, on your face. Vertical clarity is with the IPD adjustment. And only the center of the rifts lens is clear, roughly a 3/4" dia area, so try to move your head to change view not your eyes.
luck
ps: every other sorty or so, I take the dam thing off and let my eyes rest. The SDE forces the yes to constantly try and focus on something, they cannot.