I have this all the time, I see shadows out of the corner of my eyes all the time. I always do "reality checks" when I have someone around. It is good for seeing and hearing things that may not be there, and then I know what to tell my doctor. Like, if I hear something, I will ask my husband "did you hear that"? It helps me figure out whether I am in or out of reality. I am sorry you are dealing with this, you are not alone *hugs*