On a bad day it feels as though someone has applied the vignette filter and my field of view is decreased, whilst things become a bit more blurry and less vibrant. 

My eyelids also become a bit heavier, as though I've just woken up after a nap. 

And there's a sort of foggy feeling in my forehead and behind my eyes. 

Can any of you guys relate to this or does it sound like something unrelated to anxiety?