>>284622756
Focus is pretty weird in VR because the screen is a fixed focal distance away from your eyes, about 2 meters, no matter what you're looking at virtually. So for gunsights right up next to your face, you still can have them in focus (and whatever you're shooting at) without any eye strain. However, until you get used to it, your eyes will try to focus on the virtually sights, which will actually make the whole screen blurry. Your eyes will give up trying after a while though; same effect as >>284616330. Also pic related is one of the VR stocks, which some people use but I don't.

tl;dr shooting in VR is different than RL, but it's still fun and a skill you can get good at.