How to scale the scene when using WebVR?

I was just thinking, what are typical values for the eye-to-eye distance in three.js units, or how do I access the value?

The guy says vr scene appears huge to him which, I assume, means the eye-to-eye distance is too small. So I would need to apply some scale when switching to vr…? how? when? is there a guide to this?

I saw similar previous thread but it was not helpful.

Have you tried to scale the entire scene when WebVR is presenting? Something like scene.scale.set( 0.5, 0.5, 0.5 );

Assuming you are using WebVR and not WebXR, you can use renderer.vr.isPresenting() in order to determine if the app is in VR mode.