>>359979572
Those are known as god rays and are an inherent artifact on fresnel lenses. However, manufacturing variation exists on the Quest 2 in terms of the lens quality (and this variation happens on almost all headsets), so while you probably have an average unit, it might also be possible it's one of the not as good ones. 

If your IPD is not set accurately or your eyes aren't at the "sweet spot" distance to the lenses, it can worsen the effect, so you should make sure to dial that in. There are plenty of resources online about that kind of thing that explain some good ways to get the IPD and sweet spot better than I could, so go look it up. Note that the Quest 2 has 3 IPD positions but you can fiddle around with it to get it stuck into the in-between positions for better accuracy.