Strange blue artifacts/clipping effect in Unity

Hey there, I'm working on a VR Application and I have a strange effect while in play mode. 
I can see some blue artifact/clipping effect around the top corners while in play mode (only with VR-Headset on, does not show up in the scene tab). It even appears when I record my view.

Does anyone know how to fix this? It must be something with the camera, right?
Here is a picture where you can see it in the top right corner.